led reference design cookbook_ti

2Q 2010www.ti.com/led

LED Reference Design Cookbook

LED Reference Design Cookbook TexasInstruments2Q2010

LED Reference Design Cookbook

Table of Contents

2

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ArticleLED

ConfigurationDimming Options VIN VOUT (VDC) IOUT (mA) Device Page

LED Drivers

TRIAC Dimmable LED Lighting Reference Design 3 to 5 series TRIAC 120 and 230 V 14 to 17 V 325 TPS92010 4

10-Watt, AC/DC LED Driver 3 to 6 series — 120 to 290 VAC 24 typical 350 TPS92010 6

Dimmable LED Lighting Driver for Lightbulb Retrofit Apps 9 to 11 series TRIAC 90 to 265 V 28 V 350 TPS92210 8

Low-Cost AC/DC TRIAC Dimmable Driver Replacement for Lightbulb

7 to 9 series TRIAC dimmer 90 to 130 VAC 24 to 32 450 TPS92001 10

110-Watt, Constant-Current, Isolated Driver with PFC 7 to 15 series (up to 4 strings)

Analog or PWM 90 to 265 VAC 22 to 60 500 UCC28810 12

100-Watt, Constant-Current, Non-Isolated Driver with PFC 15 to 30 series PWM 90 to 265 VAC 55 to 100 900 UCC28810 14

240-W LED Lighting System 6 series PWM 108 to 305 VAC 70 to 85 3000 TPS92020UCC28810UCC28811

16

Constant Current Driver with PFC 3 to 13 series — 180 to 265 VAC 10 to 48.5 700 UCC28810 18

LED Streetlight Driver Based on SEPIC Topology 80 series TRIAC dimmer 150 to 264 VAC 300 max 350 UCC28810 20

25-Watt Dimmable Driver with PFC 10 series TRIAC dimmer 85 to 305 VAC 33 to 38 700 UCC28810 24

Nonsynchronous Boost LED Driver 10 series (1 or 2 strings)

— 9 to 18 VDC 40 max 700 or 350 TPS40211 26

Wide-Input DC Voltage Range SEPIC Driver 4 series — 8 to 40 VDC 13 typical 350 TPS40211 28

Article Standard Description TI Devices Page

Lighting Communications and Control

TMS320C2000™ Power-Line-Communcations Modem Eval Kit

EN50065 IEC 6100-3 OFDM and S-FSK PLC Modem Kit TMS320C2000™OPA564PGA112

30

Digital Addressable Lighting Interface (DALI) DALI DALI Reference Design Using MSP30™ MCU MSP430™ MCU 32

ArticleLED


LED Drivers

DC/DC LED Developer’s Kit 8 strings (1-10 LEDs per string)

PWM 12 to 24 VDC 12 to 40 V 8X 1A Piccolo™ MCU

33

3-Watt Solar Lantern 3 series Analog or PWM 4.5 to 7.4 VDC 10.5 typical 350 TPS61165 34

High-Brightness LED Driver with Switch Control 9 to 11 series Linear 4.5 to 42 VDC 42 max 500 TL4242 36

High-Brightness LED Driver with Single-Clock Operation 8 parallel (up to 8 strings)

Pending 3.0 to 5.5 VDC 2.0 to 17.0 V 120 per channel

TLC5917 38

Wireless-Controlled Triple LED Driver 3 parallel (tricolor) — 4.5 to 5.5 VDC 3 typical 300 per LED TPS62260 40

Low-Voltage Buck Boost for LED Torch 1 Dual level 1.2 to 5 VDC 5 typical 600 TPS63000 42

Boost Driver with Integrated Power Switch 4 to 8 series Analog or PWM 5 to 12 VDC VIN to 38 2000 max TPS61500 44

1.5-A White LED Driver for Notebooks Up to 10 per channel

(up to 6 channels)

PWM 5 to 24 VDC VIN to 38 Six 25-mA current sinks

TPS61180TPS61181TPS61182

46

Multichannel PWM Power Driver for Power LED Applications

4 strings (15 series each)

Digital or PWM 2 to 50 0 to 49.5 2500 max DRV9812 48

Small LCD Backlight with Digital and PWM Dimming 10 series Digital or PWM 3 to 18 VDC 26 or 38 max

700 max TPS61160/1 50

Small LCD Backlight from LDO 4 parallel (2 banks of 2)

— 2.5 to 5.5 VDC 3 typical 25 per LED TPS7510x 52

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LED Reference Design Cookbook 3

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TexasInstruments2Q2010 LED Reference Design Cookbook

LED Reference Design CookbookHelpingYouSolveYourLightingDesignChallenges

TheLEDReferenceDesignCookbookisdesignedtoprovideyouwithavaluabletooltohelpyousolveyourlightingdesignneeds.CustomersseekingthelatestininnovativeandaffordableLEDlightingsolutionscanbenefitfromTI’sbroadproductportfolioofAC/DC,DC/DC,LEDdrivers,powermanagementdevices,wirelessandwiredinterfacecontrolandembeddedprocessors.

Designershavetheoptionofnotonlycontrollingthepowerstage,butregulatingLEDcurrentsaswell,eliminatingtheneedformultiplecomponentsandreducingsystemcost.Systemscanbedesignedtoaccuratelycontrolvoltageandcurrentregulationforpreciselightintensityandcolormixing,temperaturemonitoringtopreventthermalrunaway,intelligent/adaptivedimming,andfaultdetection(overvoltage/current,blownstring).Communicationwithexternalsystemsisalsopossibleviapower-linecommunication(PLC),wirelesstechnologyorinterfaces.

LEDlightingdesignersarechallengedwithmeetingtheirefficiencyandreliabilitygoalsfasterinadvancedlightingdesigns.TI’slightingportfolioishelpingdesignersachievetheirgoalsatafasterrate.

ToseetheTIsolutionsforgenerallighting,signage,backlightingandautomotive,allcomplimentedbyacomprehensivecustomersupportnetwork,visit:

TI has Solutions for Your Lighting Challenges:• Precisionchannel-to-channeland

chip-to-chipaccuracytocreatethebesthueandluminanceinyourRGBmessageboardsandvideodisplays

• Smallfootprint,highestefficiency,programmableLEDorOLEDbacklightcontrollers

• Blinkinglow-powerLEDstoactasindicatorsinanautomotivedisplayorinacasinogame

• ControllerstopoweranddimhighbrightnesswhiteorRGBLEDsforarchitecturalluminariesandportablelighting

• PoweringarraysofHBLEDsoffanACsourceforuseinstreetlightingandreplacinghigh-intensitydischarge(HID)lamps

• HighlyintegratedZigBee®transceiversandSoCsolutionsforwirelesslightingcontrolandhomeautomation

ArticleLED


LED Drivers

Medium-Size LCD Backlight 3 series Digital or PWM 3 to 12 VDC 5 typical 820 max TPS61165 54

Large-LCD Backlight Driver Up to 96(12 series, 8

strings)

Analog or PWM 4 to 24 VDC 16 to 48 320 TPS61195 56

24-Channel, 12-Bit PWM LED Driver 24 parallel Digital or PWM 3.0 to 5.5 VDC 2.0 to 17.0 V 40 per channel TLC5951 58

24-Channel, Constant-Current LED Driver with Global Brightness Control

24 parallel Digital 3.0 to 5.5 VDC 2.0 to 17.0 V 35 per channel TLC5952 60

16-Channel LED Driver with Load-Switch Dimming Control 16 parallel PWM or Analog 3.0 to 5.5 VDC 17 max 100 per channel

TLC59116 62

www.ti.com/led

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TRIAC Dimmable LED Lighting Reference Design

TPS92010


TPS92010

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Description ThisdesignusestheTPS920108-pin,high-efficiencyoff-lineLEDlightingcontroller.Thiscontrollerincorporatesmanyfeatures,suchasfrequencyfold-backandalow-powermode,toimplementalow-cost,high-efficiencyflybackconverter.

AnapplicationofthisconverterisretrofittinglightbulbswithLEDs.Theconvertercandrive3to5high-brightnessLEDsinserieswithaconstantcurrentof0.35A.

Theflybacktopologyischosenbecauseitallowsalowercomponentcountandlowercostthanother

Efficiency without Dimmer

Dimming Performance

Output Current Regulation

Key Features• AC/DCTRIACdimmableLED

referencedesign• Idealforresidentiallighting• 3-to12-Wapplications• Highefficiency• TIlosslessdimmingcircuitfora

cooler,lower-powersystemduringdeepdimming

Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TPS92010

Efficiency with Dimmer

topologies.LEDcurrentissenseddirectlytoensureitstightregulation.AspecialcircuitforcompatibilitywithTRIACdimmersadjuststheoutputcurrentlinearly,avoidinganystroboscopiceffectsoraudiblenoisethatmightotherwiseoccur.TheTPS92010isdesignedforlow-powerlightingapplicationsthatdonotrequirepower-factorcorrection.

Design Specifications

Parameter Minimum Typical Maximum

Input voltage (VAC) 100 120 130

Output voltage (VDC) 9 — 18

Output current (A) — 0.35 —

Efficiency (%) — 80 —

Adjusting the Output Current

Output Current(A)

R15(W)

R17(W)

R1(W)

R42(W)

0.20 1000 150 330 1000

0.225 1200 86 390 1000

0.25 1200 220 470 1000

0.275 1000 560 680 680

0.30 1500 220 680 680

0.325 1500 330 470 1500

0.35 1000 1000 820 1000

0.40 1800 470 1000 1000

0.45 2200 390 1500 1000

0.50 2700 220 1500 1000

0.60 3300 150 1500 1500

0.70 3900 270 2200 1500

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TPS92010

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TPS92010



Input voltage (VAC) 100 120 130

Output voltage (VDC) 9 — 18

Output current (A) — 0.35 —

Efficiency (%) — 80 —

Adjusting the Output Current

Output Current(A)

R15(W)

R17(W)

R1(W)

R42(W)

0.20 1000 150 330 1000

0.225 1200 86 390 1000

0.25 1200 220 470 1000

0.275 1000 560 680 680

0.30 1500 220 680 680

0.325 1500 330 470 1500

0.35 1000 1000 820 1000

0.40 1800 470 1000 1000

0.45 2200 390 1500 1000

0.50 2700 220 1500 1000

0.60 3300 150 1500 1500

0.70 3900 270 2200 1500

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10-Watt, AC/DC LED Driver

TPS92010 PMP3522

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Description ThePMP3522isareferencedesignthatutilizestheTPS92010highefficiencyLEDlightingdrivercontroller.

Residentialdownlightinghasseenagreatdealoftransitiontomoreefficientsourcesoflight.CompactCFLshavebecomeamainstayinresidentiallighting,butasthelifetimecostofLEDlampsfalls,allthemorelow-power,small-form-factordesignswillbeneeded.Thisreferencedesignisanunder-10-W,non-isolatedSEPICLEDdriverspecificallylaidoutforresidentialdownlighting.


PMP3522 Schematic


Parameter Minimum Typical Maximum Unit

Input voltage 120 — 290 VAC

Output voltage — — 24 Volts

Output current — 0.350 — Amp

TPS92010

C101nF

C20.1µF

C510µF

C60.1µF

D2BZX84C20T

C10.047µF275VAC

R8

10

R7100K

Q1FCD4N60

L3180µH

J2

R90.1

R126.11K

R133.3

R143.3

3 - 6 LEDs @ 350mALET RTN

R11100

C7

0.1µF

R10100 Q2

MMBT3904LT1

R4100

R3220K

R2220K

R1220K

TP2

D6BAT54S

D3MMBD4148

C9470µF

C1110µF

D4MURA160T3

D5BZX84C27T

R1533.2K

C31nF

C447nF

LPMVSDVDD

GD

1

2

3

4

1

2 AC

AC

8

7

6

5

1 2

2

1

3 4

SSFBPCSGND

L11mH

F10.5A

D1RH05-T

AC IN120 - 290VAC

J1

L21mH +

+

+

+ +

Key Features• Single-stageSEPIC,PFC+LED

currentregulation• Low-cost,low-componentcount• Drives3to6LEDsat350mA

Formorereferencedesigns,see:www.ti.com/powerreferencedesigns



TPS92010 PMP3522

7

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TPS92010 PMP3522Laid Out for Bulb Replacement

Regulation

Efficiency

Control Loop Frequency


Dimmable LED Lighting Driver for Lightbulb Retrofit Apps

TPS92210EVM


TPS92210EVM

8

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Description TheTPS92210EVMisanaturalpower-factor-correction(PFC)LEDlightingdrivercontrollerwithadvancedenergyfeaturestoprovidehigh-efficiencycontrolforLEDlightingapplications.TheTPS92210EVMiscapableofprovidingahighpowerfactor,TRIACdimming,loadprotectionandextendedlifeinasmallspaceatlowcost.

TheTPS92210EVMemploysquasiconstant“on”timethatenablessingle-stagePFCinanisolatedflybackconfiguration.Intendedfor

Key Features• AC/DCTRIACdimmableLEDdriver

withPFC• Idealforresidentiallighting• Singlestage(PFCandLED

currentregulation)• 12-to25-Wapplications• DeepTRIACdimmingcapability

Web Linkswww.ti.com/tps92210evm

TPS92210EVM Block Diagram

low-powerlightingapplications,itcanbepackagedinavarietyofways,includingindividuallampdesignsandgenericPCBformfactorsformanytypesoflighting.Thedriverpreservesdimmerholdingcurrentandfeaturesdual-slopeoutputcontroltoimprovedimminglinearitywhenusedwithcommonTRIAC-basedphase-controldimmers.TheTPS92210controllerisprogrammedtooperateatafixedfrequencywithaconstant“on”timefortheinternalswitchthatdrivestheprimarypowerFET.

VDD

OOP

CGD

CSD

FB

OTM

PCM

GND

FEEDBACK

C

RCS

Primary Secondary

1

4

3

7

8

2

8

5

Phase AngleDetection

SupplementalLoad

Current Referenceand

Difference Amplifier

TPS92210

Description Parts VIN RangeVOUT (DC)

RangeNumber of LEDs

IOUT(max)

POUT(max) Eff. PFC ISO

Dimming In

Dimming Out

TPS92210EVMHigh efficiency, PFC and TRIAC dimmable LED lighting driver

TPS92210 180 V 265 V 17 V 21 V 6 350 mA 11 W 83% Yes Yes TRIAC Linear


NEW!



TPS92210EVM

9

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TPS92210EVMLED Lighting Driver’s Efficiency LED Lighting Driver’s Total Harmonic Distortion

LED Lighting Driver’s PFC

LED Lighting Driver’s Current RippleLED Lighting Driver’s Current Regulation


Low-Cost AC/DC TRIAC Dimmable Driver for Lightbulb

TPS92001 PMP4981

10

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Description ThePMP4981isareferencedesignforanLEDdriverinalightbulb-replacementcircuit.ThedesignisoptimizedtofunctionwithACinputsourcesthatmaybefedthroughanindustry-standardTRIAC-basedphase-cutdimmer.

PMP4981 Schematic


Description Parts

VIN (AC)

Range

VOUT (DC)

RangeNumber of LEDs

IOUT (max)

POUT (max) Eff. PFC ISO

Dimming In

Dimming Out EVM

PMP4885 low- cost offline

TPS92001 90 247 to 9 450 mA 12 W 79% No No TRIAC PWM Paper

LED lighting driver TLC372 130 32

ThePMP4981’sdimmingfunctionallowsthestringofLEDstobedimmedtoverylowlevelswithoutflickeringorstroboscopiceffects.CurrentisdrawnfromtheTRIAConlywhenneeded,providinghighefficiencywithanon-isolateddriverforavery-low-costsolution.Thissinglestageprovideshighreliability,longlifeandhighperformance.

+

U1TPS92001

L2470µ

R230

L11.2mH

+

VDD

R910K

D2MURA120T3

D1MURA120

D412V

D5301V Q2

FQT4N25

Q1FZT757A

R710KTP8

TP1

TP4

TP7

TP2

LED+LED–

R61R81

R121K

R410

R3301KR5

2KC6

100p

C7.01U

C10.01µ

R1028K

C91000P

C1.1µ

R11100K

C8.01µ

C34.7µF

C20.1UC5

1µFR12.10K

C11.01µ

C131.0U

U2:ATLC372CD

VDD

REF

REF

20 VACTRIAC Dimmer

TP3

TP6TP5

C40.047µF

200V

C150.01µF

200V

3

1

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56

7

+

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2

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FBSSRT1RT2

REFVDDOUTGND

8

4

1

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D7 15V

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R1940.2K

R1640.2K

R15200KR17

560

Q3BF720

Q43906

R188.06K

TP9

C141µ

U2:BTLC372CD


Key Features• Low-cost,AC/DCTRIACdimmable

LEDdriverlightingreferencedesign• Idealforresidentiallighting• LEDripplecurrent100%(120Hz)• 6-to11-Wapplications• DeepTRIACdimmingcapability• Noelectrolyticcapacitorsoption


Low-Cost AC/DC TRIAC Dimmable Driver for Light

TPS92001 PMP4981

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Low-Cost AC/DC TRIAC Dimmable Driver for Lightbulb

TPS92001 PMP4981Line Current and Voltage – Dimmer at Full Power Position

LED Current and Voltage – Dimmer at Full Power Position Rectified AC (Top) and LED Current (Bottom) — High Conduction Angle

Line Current and Voltage – Dimmer at ~ Half Power Position Rectified AC (Top) and LED Current (Bottom) — Low Conduction Angle

LED Current and Voltage – Dimmer at Half Power Position


100-Watt, Constant-Current, Non-Isolated Driver with PFC

UCC28810/UCC28810EVM-002

12

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Description TheUCC28810EVM-002evaluationmodule(EVM)isaconstant-currentnon-isolatedpowersupplyforLEDlightingapplicationsthatrequirehighbrightness,suchasstreet,parkingorarealighting.Thereferencedesignconvertstheuniversalmains(90to265VRMS)toa0.9-Aconstant-currentsourcetodrivea100-WLEDload.

TheUCC28810EVM-002isatwo-stagedesign.Thefirststage,atransition-modecircuitwithPFC,ensuresthatthedesignmeetsvariousstandardssuchastheEN61000-3-2.ThePFCcircuitconvertstheACinputtoaregulatedDCvoltage,whichcanbeconfiguredasaboost-followerPFCorafixedoutputvoltage.Theboost-

Key Features• High-powerAC/DCLEDdriver

withPFC• Idealforstreet,parkingorarea lighting• Universal-input,non-isolateddesign• TightlyregulatedLEDcurrent• PWMdimming,200Hzto1kHz• Highefficiencythroughdimming• Activepower-factorcorrection

Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/UCC28810

Reference designs:www.ti.com/powerreferencedesigns

EVM:www.ti.com/ucc28810evm-002

UCC28810EVM-002 Block Diagram


Description Parts

VIN (AC)

Range

VOUT (DC)

RangeNumber of LEDs

IOUT (max)


Dimming In

Dimming Out EVM

UCC28810 EVM002 100-W

UCC28810 90 5515-30 900 mA 100 W 93% Yes No PWM PWM Yes

LED lighting driver UCC28811 265 100

followerPFCtrackstheACinput’speakvoltageforincreasedefficiencyatlow-lineoperation.ThePFC’sDCoutputvoltageisthenregulatedtoafixedvalueintheregionof396VDC.Thesecondstageofthedesignalsousestransitionmodebutisconfiguredasabuckconverter.ItconvertsthePFCoutputvoltagetoafixed0.9-AcurrenttodriveanLEDload.ThesecondstageacceptsPWMdimminginputs(eitherexternallyorfromanonboardcircuit)andappropriatelytogglesitselfonoroff.

PFC Boost

Enable

BiasBias

PFC Output

LED PWMInput

Critical Conduction ModeLow Side Buck Current Source

PrimaryGnd

UCC28810

TZE

VDD

GDRV

ISENSE

GND

EAOUT

VINS

VSENSE

6

2

3

1

5

8

7

4

UCC28811

VDD

GDRV

GND

TZE

VSENSE

EAOUT

VINS

ISENSE

1

2

3

4

8

7

6

5



UCC28810/UCC28810EVM-002

13

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UCC28810/UCC28810EVM-002Efficiency and Power Factor vs. Line Voltage

UCC28810EVM-002 transition mode buck PWM response (expanded). Ch1: LED VOUT, Ch2 PWM, Ch3 buck inductor current 500 mA/Div, Ch4 VDS Ch1 and Ch4 Share GND reference.

PWM Dimming Response

UCC28810EVM-002 efficiency and power factor vs. line voltage 30 Cree XRE LED’s at 900 mA. LED current regulation as a function of line voltage.

Line Regulation 30 LEDs at 900 mA, (98 W)

PWM Dimming Waveforms

UCC28810EVM-002 transition mode buck PWM response. Ch1: Buck VIN, Ch2: Buck VDS, Ch3: LED current (0.5 A/Div), Ch4: LED voltage. Ch1 and Ch4 share GND reference.

THD Factor vs. Line Voltage

UCC28810EVM-002 THD vs. line voltage 30 Cree XRE LED’s at 900 mA.


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110-Watt, Constant-Current, Isolated Driver with PFC

UCC28810/UCC28810EVM-003: SimpLEDrive™Description TheUCC28810EVM-003evaluationmodule(EVM)isanoff-lineAC-to-DCLEDcurrentdriverwithPFCforapplicationssuchasstreet,high-bay,andmedium-orlarge-infrastructurelighting.TheUCC28810EVM-003isathree-stageconverterdesignthatdeliversupto110W.Thefirststageisauniversalinputboost-PFCcircuitprovidinga305-to400-VDCoutput.Thesecondstageisalow-sidebuckcircuitprovidingthecontrolledcurrentsource,andthethirdstageisaseriesoftwohalf-bridgeDC/DCtransformersthatprovidesisolationofmultipleLEDstrings.

Thispatent-pendingsolutionprovidesaneasilyscalableandcost-effectivemethodofdrivingmultipleLEDstrings.TheUCC28810EVM-003implements



Description Parts

VIN (AC)

Range

VOUT (DC)

RangeNumber of LEDs

IOUT (max)


Dimming In

Dimming Out EVM

UCC28810 EVM003 100-Wisolated multi-string LED lightingdriver w/multiple transformers

UCC28810

UCC28811

TPS92020

90, 265 22 V, 60 V 4X (7 - 15) 500 mA 110 W 91% Yes Yes PWM PWM Jul-09

single-referencecurrentcontrolanduniversaldimming(viaAMorPWM)forallLEDs.ThereferencedesigneffectivelydrivesalargenumberofLEDsconnectedinseries,butthevoltageontheLEDstringsissafe(low)andisolatedfromtheACline.Themultistringarchitectureismorecost-effectivethananarchitecturewithaconstantvoltageplusabuckstageforeachLEDstring.TheLED-driverarchitectureisreadilyscalabletoveryhighpowerlevels.ExcellentLEDcurrentmatchingbetweenstringsisachievedwiththisarchitecture.TheUCC28810EVM-003achieveshighefficiency(91%),highpowerdensityandahighpowerfactor.Thecontrolstageisasimpleandrobustdesign,andtheEVMprotectsagainstscenarioswithopenandshortLEDstrings.

Key Features• SimpLEDrive™high-power

dimmableAC/DCLEDdriverwithPFC

• Idealforstreet,high-bayorinfrastructurelighting

• IsolatedfromtheACline• Readilyscalabletohigherpower

levels• LEDcurrentmatchingbetween strings•Highefficiencyandpowerdensity•Activepower-factorcorrection

Web LinksReference designs:www.ti.com/powerreferencedesigns

Datasheets, user’s guides, samples:www.ti.com/sc/device/UCC28810


PFC Boost Follower

Enable

+50 - 60V

+50 - 60V+50 - 60V

+50 - 60V

BiasBias

Bias

PFC Output

LED PWMInput


PrimaryGnd

UCC28810

TZE

VDD

GDRV

ISENSE

GND

EAOUT

VINS

VSENSE

6

2

3

1

5

8

7

4

UCC28811

VDD

GDRV

GND

TZE

VSENSE

EAOUT

VINS

ISENSE

1

2

3

4

8

7

6

5VCC

GD1

GND

GD2

RT

DT

SS

TPS92020


15

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110-Watt, Constant-Current, Isolated Driver with PFC

UCC28810/UCC28810EVM-003Efficiency vs. Line Voltage

UCC28810EVM-003 IOUT matching vs. line voltage 4 x 15 Cree XRE LED’s at 500 mA.

Ch1: VBUCK+, Ch2: Buck VDS, Ch3: AC line current 1A/Div, Ch4: VBUCK - Ch1 and Ch 4 share GND reference.

Power Factor vs. Line Voltage UCC28810EVM-003 AC Input Current During PWM Dimming

IOUT Matching vs. Line Voltage

UCC28810EVM-003 efficiency vs. line voltage and load 4 x 15 Cree XRE LED’s at 500 mA.

UCC28810EVM-003 power factor vs. line voltage 4 x 15 Cree XRE LED’s at 500 mA.

PFC Boost Follower

Enable

+50 - 60V

+50 - 60V+50 - 60V

+50 - 60V

BiasBias

Bias

PFC Output

LED PWMInput


PrimaryGnd

UCC28810

TZE

VDD

GDRV

ISENSE

GND

EAOUT

VINS

VSENSE

6

2

3

1

5

8

7

4

UCC28811

VDD

GDRV

GND

TZE

VSENSE

EAOUT

VINS

ISENSE

1

2

3

4

8

7

6

5VCC

GD1

GND

GD2

RT

DT

SS

TPS92020


240-W LED Lighting System

TPS92020, UCC28810/1


TPS92020, UCC28810/1

16

➔

Description ThisreferencedesignusestheUCC28810,UCC28811andTPS92020foranisolated,off-line,240-WLEDdriverforhigh-bayandstreetlightapplications.Thedriverhasthreestages:apower-factor-correction(PFC)stage,abuckstageandanisolationstage.ThePFCandbuckstagesbothoperateincritical-conductionmode.Theisolationstageisahalf-bridgeconverterwithanoptiontoadoptamulti-transformerconfiguration.Aconstantoutputcurrentiscontrolledwithinthebuckstagetoprovide3AtotheLEDstrings,withanoutputvoltagerangingfrom70Vto85V.

TPS92020, UCC28810/1 Schematic

Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TPS92020,www.ti.com/sc/device/UCC28810 orwww.ti.com/sc/device/UCC28811



Parameter Test Conditions Minimum Typical Maximum Unit

Input voltage — 108 120/277 305 VRMS

Power factor — 0.990 — — —

Output current — — 3 — Amp

Output ripple COUT = 4.4 µF — 300 — mAPP

Output voltage — 70 — 85 Volts

Efficiency — 87 — — %

≈

≈

UCC28810

TZE

VDD

GDRV

ISNS

GND

EAOUT

VINS

VSNS

ENABLE LED PWMInput

PFC Output CC Buck Output

PFC Boost Follower

Primary GND

Critical Conduction Mode Low Side Buck Current Source

Half BridgeDC Transformer

Bias

1

2

3

4

5

6

7

8

UCC28811

VDD

GDRV

GND

TZE

VSNS

EAOUT

VINS

ISNS

1

2

3

4

8

7

6

5

TPS92020

VCC

GD1

GND

GD2

RT

DT

SS

Bias

Bias

+70V to 85V3A

NEW!



TPS92020, UCC28810/1

17

➔


TPS92020, UCC28810/1Power Factor Power Factor

Load Regulation Load Regulation

Efficiency Efficiency


Constant Current Driver with PFC

UCC28810 PMP4501

18

➔

Description ThePMP4501isanisolated,off-line,AC-to-DCLED-currentdriverwithPFCforapplicationssuchascommercialfixturelightingandgeneralisolatedLEDdrivers.ThePMP4501isasingle-stageflybackPFCconverterthatdeliversupto34Wwitha180-to265-VACinputvoltagewhileprovidinga10-to48-Voutputvoltageataconstantoutputcurrentof700mA±2%.

ThePMP4501implementssecondary-sidecurrentcontrolfortheLEDstring.Overvoltageprotection

Key Features• IsolatedsinglestageLEDdriver• NaturallyhighPFC• 90%efficient• Universalinputvoltagerange• 700-mAoutputcurrent• LowLEDripplecurrent


PMP4501 Reference Design Schematic

L11mH

D1DF06S

C10.1µF

L220mHT

P1

TP

2

C30.15µF275VAC 3

2

4

1

F11A/250V

C11µ

C922nF

C14DNP

R1911K

R141.5M

R91.5M

R1100K

R4100K

R710K

Q1PZT2222A

R82.2

D2BYG10M

D3BYG10M

R6100K

C6100µF

25V

C11.1µ

C1210pF

R106.98K

R22330

R2047.5K

R2147.5K

R230.82

4

3

32

56

7

8

12

A

5

4

7

8

2

1

9

10

1

4

1

2

R1610

+C747µF63V

D4S1KB

D6BAS16

D815V

D7MURA140T3

D11MBR0520L

U3TCMT1107

D13BAW56

D1212V

D9MURA120T3

D5PDU540-13

T1G094010LF

+

R222KR322K

C210nF

C1047µF35V

C81000pF Y1

Q3 3904

+

C4470µF

63V

+ C5470µF63V

+

C1547µF35V

C161µF

R2710K

R2610K

R283.32K

R242.21K

R111K

R1223.7K

R131K

R50.15

J110V...48V . 700mAGND

U1:BTL103WID

R172.49K

D1051V

TP3

TP5

TP4

R2510K

U1:ATL103WID

C17220µF

C131µ

+

Q2STB7NK80ZT4

U2UCC28810D

8765

1234

VDDGDRV

GNDTZE

VSNSEAOUTVINSISNS

R1810K

For Test PurposeOnly. R17=50Ω

preventsdangerousoutputvoltagesfromoccurringduringopen-stringconditions.Acurrent-senseamplifierreducesthesensingresistor’spowerdissipation,thusincreasingoverallefficiency.TheinternalreferencevoltageoftheoperationalamplifierachievesexcellentLED-currentregulationversusoutputpowerandinputvoltage.ThePMP4501achieveshighefficiency(90%peak),highpowerdensityandahighpowerfactor.ThereferencedesignprotectsagainstscenarioswithopenandshortLEDstrings,andthecontrolstageisasimpleandrobustdesign.



Description Parts

VIN (AC)

Range

VOUT (DC)

RangeNumber of LEDs

IOUT (max)


Dimming In

Dimming Out EVM

UCC28810 PMP4501 34-W

UCC28810 180 10 V

3-13 700 mA 34 W 89% Yes Yes No NoReference

DesignSecondary side current loop TL103W 265 48.5 V



UCC28810 PMP4501

19

➔


UCC28810 PMP4501PMP4501 Board

Efficiency vs. Rectified-Equivalent Line Voltage and Output Power

Output Current Ripple. Input Voltage = 230 VAC, Output Voltage = 48 V @ 700 mA

Power Factor vs. Line Voltage and Output Power AC Input Current and Voltage at Full Load and Nominal Input Voltage

IOUT Regulation vs. Rectified-Equivalent Line Voltage and Output Power


LED Streetlight Driver Based on SEPIC Technology

UCC28810 PMP3976

20

➔

Description ThePMP3976circuitshownbelowwasdesignedforacommercialLEDlightingfixture.TheSEPICtopologyhastheadvantageoveraflybackconverterinthatitclampstheswitchingwaveformsonthepowersemiconductor,allowingtheuseoflowervoltageandhencemoreefficientparts.Thisprovidesanestimated2%improvementinefficiencyinthisapplication.Additionally,thereislessringingintheSEPIC,makingEMIfilteringeasier.

TheLED-lightingcircuitusestheUCC28810transition-modeboostcontrollertoshapetheinput-currentwaveform.ThecircuitstartsbychargingC6offtheline.Oncethecontrollerisrunning,itspowerisprovidedbyanauxiliarywindingontheSEPICinductor.ArelativelylargeoutputcapacitorlimitsLEDripplecurrentto20%oftheDCcurrent.Asasidenote,theACfluxandcurrentsinthetransition-modeSEPICarequitehigh,soLitzwireandlow-loss

PMP3976 Schematic






corematerialarerequiredtoreduceinductorlosses.

Thefollowingmaterialpresentslabresultsfromaprototypethatwasbuilttomatchtheschematic.EfficiencyisquitehighovertheEuropeanlinerange,peakingat92%.Thisgoodefficiencywasachievedbylimitingtheringingonthepowersemiconductors.Also,ascanbeseenfromthecurrentwaveform,thepowerfactorisquitegoodatover96%.Interestingly,thewaveformisnotpurelysinusoidalbutshowssomesteepnessontherisingandfallingedges.Thisisbecausethecircuitmeasuresswitchcurrentbutnotinputcurrent.However,thewaveformisgoodenoughtopasstheEuropeanrequirementsforharmoniccurrents.

Key Features• Non-isolatedsingleLEDstringdriver• 92%efficientsolution• SEPICcontrolboostsforhigh voltage• Naturalsinglestagewith>0.9PFC• Low-costsolutionwithfewexternal

parts• MeetsEuropeanharmonic requirements


Reference designs:www.ti.com/powerreferencedesigns

++

+

U2UCC28810D

HS1

Q3SPP06N80C3

150VAC to 240VAC Input

LINE

NTRL

F11.6A/250V

RT12.5Ω

C1020.22µ

C1010.22µF

L14mH

R41.1 MEG0.25W

R111.1 MEG0.25W

R1515K

C100100pF

C121000pF

C4100pF C5

0.1µF

C6100µF25V

C1010pF

C81000pF

R13100K

R6100K

TP5R21 511

TP6

TP2

TP4

J1+LED

–LED

U1TLV431AIDBZ

R8100K

R20100K

R1815K

R17 301 R190.51W

R1200K0.25W

C20.22µF

T1750µH

C1 0.47µF

R3200K0.25W R23

20

R100 10

R12 1K

D100 MMSD914

R1015K

R101100K0.5W

C3330µF

R102100K0.5W

C71000pF

Q2MMBT3904

Q1MMBT2907

D4180V

R23.61W

D5180V

R9100K

R7 200K

R5 49.9K

D3 MMSD914

D1 MUR8100E

R161K

C922µF

C112.2µF

D2KBP06G

+

–4

2

1

3AC

AC

34

21

1

1 1

1

1 1

1

1 1

1

1

1

12

3

1

1

1

1

11

2

4

5

0

8

7

1

1

1

VCCDRVGNDZCD

VSNSCOMPMULTINCS

8765

1234

TP1

TP3



UCC28810 PMP3976

21

➔


UCC28810 PMP3976PMP3976 Rev B Demo Board Power Factor






The circuit is built on a PMP3976 Rev A PWB.

++

+

U2UCC28810D

HS1

Q3SPP06N80C3

150VAC to 240VAC Input

LINE

NTRL

F11.6A/250V

RT12.5Ω

C1020.22µ

C1010.22µF

L14mH

R41.1 MEG0.25W

R111.1 MEG0.25W

R1515K

C100100pF

C121000pF

C4100pF C5

0.1µF

C6100µF25V

C1010pF

C81000pF

R13100K

R6100K

TP5R21 511

TP6

TP2

TP4

J1+LED

–LED

U1TLV431AIDBZ

R8100K

R20100K

R1815K

R17 301 R190.51W

R1200K0.25W

C20.22µF

T1750µH

C1 0.47µF

R3200K0.25W R23

20

R100 10

R12 1K

D100 MMSD914

R1015K

R101100K0.5W

C3330µF

R102100K0.5W

C71000pF

Q2MMBT3904

Q1MMBT2907

D4180V

R23.61W

D5180V

R9100K

R7 200K

R5 49.9K

D3 MMSD914

D1 MUR8100E

R161K

C922µF

C112.2µF

D2KBP06G

+

–4

2

1

3AC

AC

34

21

1

1 1

1

1 1

1

1 1

1

1

1

12

3

1

1

1

1

11

2

4

5

0

8

7

1

1

1

VCCDRVGNDZCD

VSNSCOMPMULTINCS

8765

1234

TP1

TP3

LED Cookbook TexasInstruments2Q2010

22

➔


UCC28810 PMP3976Harmonic Content

The image above shows a thermal image of the board. The ambient temperature was 26ºC with no forced air flow. The input was 230 VAC.


Efficiency and Power Factor

Efficiency

Harmonic Content

The harmonic content and the EN61000-3-2 Class C (lighting equipments) Limits are shown above; input voltage was set to 230 VAC.

IOUT VOUT VIN LIN PF POUT LossesEfficiency

%

0.349 245.5 150.4 0.646 0.983 85.65 9.827 89.7

0.349 245.4 176.4 0.544 0.980 85.64 8.398 91.1

0.349 245.3 202.6 0.473 0.979 85.61 8.208 91.3

0.350 245.3 226.3 0.430 0.975 85.86 9.201 90.5

0.350 245.3 248.4 0.399 0.969 85.86 10.184 89.4

0.350 245.3 265.7 0.378 0.962 85.86 10.763 88.9

IOUT VOUT VIN LIN PF POUT LossesEfficiency

%

0.348 303.9 149.9 0.803 0.988 105.75 13.168 88.9

0.349 303.3 175.2 0.677 0.983 105.85 10.742 90.8

0.349 303.8 199.9 0.588 0.984 106.03 9.634 91.7

0.349 303.3 224.8 0.527 0.983 105.85 10.604 90.9

0.349 303.2 249.8 0.482 0.978 105.82 11.938 89.9

0.349 303.0 264.2 0.461 0.975 105.75 13.004 89.0



UCC28810 PMP3976

23

➔

Frequency Response

MOSFET Voltage Waveform

The frequency response of the feedback loop is shown in the plot above. The input was set to 220 VAC. The lower gain plot was taken with a 300 V output. The upper gain plot was taken with a 250 V output.

The image above shows the drain-to-source voltage on Q3. The input was set to 250.

Line Voltage and Current Waveform

The image above shows the input voltage and current. The input voltage was 230 VAC.

Diode Voltage Waveform

Inductor Winding Currents

The image above shows the voltage on the anode of D1. The input was set to 250 VDC.

The two images above show the currents in the individual windings of the inductor.


25-Watt Dimmable Driver with PFC

UCC28810/UCC28810EVM-001

24

➔

Description TheUCC28810EVM-001evaluationmodule(EVM)isa25-WTRIACdimmableandsingle-stageflybackconverterwithPFC.TheUCC28810EVM-001providesapproximately36Vataconstant700-mA(undimmednominal)loadcurrenttopowerastringofhigh-brightnessLEDs.ThisEVMallowstheevaluationoftheUCC28810LEDlightingcontrollerinanapplicationwhereLEDscanbeusedforgeneralilluminationapplicationsthatrequiredimming.

resistanceisusedacrossthelineorinseriesthatwouldreduceefficiency.ValleyswitchingisimplementedintheUCC28810EVM-001toimproveefficiency.Afaststart-upcircuitisalsoimplemented,sothereisnoperceiveddelayfromswitchingtoillumination.


Datasheets, user’s guides, samples:www.ti.com/sc/device/UCC28810




Description Parts

VIN (AC)

Range

VOUT (DC)

RangeNumber of LEDs

IOUT (max)


Dimming In

Dimming Out EVM

UCC28810 EVM001 25-W

UCC28810 85

33 10 700 mA 25 W 89% Yes Yes TRIAC Linear YesPFC dimmable LED driver TPS3808 305

UsingtheUCC28810transition-modeboostICwithPFCinaflybackconverteryieldsavalley-switchingdesignthatcanachieve90%efficiencyandahighpowerfactoroverauniversalwideinput-voltagerange.TheUCC28810EVM-001alsooperatesoverauniversalwideinput-voltagerange.High-performanceTRIACdimmingdetectionandregulationadjustmentareachievedwithminimalimpactonefficiency.

Aninput-filterdampingnetworkensuresoperationswithmostTRIAC-basedwalldimmers.Noextra

VSENSE

UCC28810

EAOUT

VINS

ISENSE

1

2

3

4

8

7

6

5

VDD

Dimmer

GDRV

GND

TZE

Input Filter and Bridge

High Voltage Startup

ZeroEnergyDetect

PrimaryBias

SecondaryBias

CurrentEA

Voltage LimitEA

Triac Dimming Detection



UCC28810/UCC28810EVM-001

25

➔


UCC28810/UCC28810EVM-001Efficiency vs. Line Voltage

Load current as a function of line voltage. 10 Cree XLamp® 7090 XR-E, white, 700 mA LEDs connected in series was used for the load.

Triac Dimming Detection Circuit Waveforms – Deep Dimming

Power Factor vs. Line Voltage

Total Harmonic Distortion vs. Line Voltage Triac Dimming Detection Circuit Waveforms – Light Dimming

Output Current vs. Line Voltage

Efficiency as a function of line voltage. 10 Cree XLamp® 7090 XR-E, white, 700 mA LEDs connected in series was used for the load.

Power factor as a function of line voltage.10 Cree XLamp® 7090 XR-E, white, 700 mA LEDs connected in series was used for the load.

Total harmonic distortion as a function of line voltage. 10 Cree XLamp® 7090 XR-E, white, 700 mA LEDs connected in series was used for the load.


Nonsynchronous Boost LED Driver

TPS40211 PMP4026

26

➔

Description TheTPS40211isawide-input-voltage(4.5-to52-V),nonsynchronousboostcontroller.Itissuitablefortopologiesthatrequireagroundedsourcen-channelFETsuchasboost,flyback,SEPICandvariousLED-driverapplications.TheTPS40211featuresaprogrammablesoftstart,overcurrentprotectionwithautomaticretry,andaprogrammableoscillatorfrequency.Current-modecontrolprovidesimprovedtransientresponseandsimplifiedloopcompensation.Thefeedbackpinhasareferencevoltageof260mVtohelpreducethepowerusageandcostofthesenseresistor.

ThePMP4026circuitshownbelowwasdesignedwithanautomotiveinput-voltagerange.Thedriverwasbuilttooperateunderlow-powertonominalbatteryconditionsandtosurviveload-dumpincidents.TheTPS40211waschosenforthisapplicationduetoitslowfeedbackvoltageandwide

Key Features• Wide4.5-to52-Vinputrange• Low-costnon-synchronousboost• Highefficiencyfromlow260-mV

VREF• Simpleloopcompensation• SupportsversatileSEPICtopology


PMP4026 Schematic

TPS40211DGS

48V @ 0.7AGND

VDDVBP

GDRVISNSGND

RCSSSDCOMPFB

109876

Freq = 150 KHZ

12345

C71µ

D100(R6)3.3V

VBP

R549.9K

R110.01C9

100pF

R101.21K

Q1Si4858

R215K

C1470pF

R3249K

R1249K

R10010K

C44700pF

C83.3µF

3 2 1

4G

S

D8 7 6 5

1 2

R4A2

D247V

R949.9

C12B3.3µF50V

C12A3.3µF50V

D1MBRS260

1

2

3

Q1002N7002DICT

9 - 18 VINGND

C50.1µ

33 µH

ENAB



Input voltage 9 — 16 VDC



Switching frequency — 150 — kHz

input-voltagerange.Theapplication,powereddirectlyfromVBAT,canhaveastringofuptoten700-mALEDsinseriesortwoparallelstringswithuptoten350-mALEDsineachstring.

Anadditionalreferencedesignisavailable.Thisdesignisa700-mA,nonsynchronousboostcurrentregulatorforanLEDdriver.Ithasan8-to18-Vinputanda20-to35-Voutput.Itcanbefoundalongwithademonstrationboardat:

http://focus.ti.com/docs/toolsw/folders/print/tps40211evm-352.html




TPS40211 PMP4026

27

➔


TPS40211 PMP4026Startup

Efficiency Control Loop Frequency Response: 12 V input; 1.15 A Load

Load Regulation of Outputs Load Transients

Output Ripple Current

The input voltage was set at 12 V, with 0.15 (LED) + 1 (resistor) A load on the outputs. The image was taken with a 1.15 A/20 V load. Top waveform is FET drain, bottom is LED current.

Total output current was 1.15 A, output voltage was 20 volts.

Output response to driving TP%. The input voltage was set to 12 V.


Wide-Input DC Voltage Range SEPIC Driver

TPS40211 PMP3943

28

➔

Description TheTPS40211isawide-input-voltage(4.5-to52-V)nonsynchronousboostcontroller.Itissuitablefortopologiesthatrequireagroundedsourcen-channelFETsuchasboost,flyback,SEPICandvariousLED-driverapplications.TheTPS40211featuresaprogrammablesoftstart;overcurrentprotectionwithautomaticretry;andaprogrammableoscillatorfrequency.Current-modecontrolprovidesimprovedtransientresponseandsimplifiedloopcompensation.Thefeedbackpinhasareferencevoltageof260mVtohelpreducethepowerusageandcostofthesenseresistor.

ThePMP3943circuitshownbelowwasdesignedwithanautomotiveinput-voltagerange.Thedriverwasbuilttooperateunderlow-powerbatteryconditionsandtosurvive

PMP3943 Schematic



Input voltage 8 — 40 Volts

Output voltage — 13 — Volts



U1TPS40211DGS

J1VIN

GND8-40

Short L4L40

13V @ 350mATested with LEDs

Giving 12.3 V

LEDA

LEDC

LEDC

D18180-13C15

3.3µF

VDDVBP

GDRVISNSGND

RCSSSDCOMPFB

109876

Freq = 380 KHZ

3 2 1

4

8 7 6 5

3 4

1 2

12345

03

L2100µH

R101k

R949.9

R549.9

R710

C71µF

R60

R140.75

C1310µF

R110.10

D218V

R10010K

R20

R1249K

C44700pF

C83.3µF

C50.1µF

C1220pF

C347pF

C20.22µF C9

0.1µF

1

2

load-dumpincidents.TheTPS40211waschosenforthisapplicationduetoitslowfeedbackvoltageandwideinput-voltagerange.

Anadditionalreferencedesignisavailable.Thisdesignisa700-mA,nonsynchronousboostcurrentregulatorforanLEDdriver.Ithasan8-to18-Vinputanda20-to35-Voutput.Itcanbefoundalongwithademonstrationboardat:

www.ti.com/sc/device/TPS40211evm


Key Features• Wide4.5-to52-Vinputrange• Low-costnon-synchronousboost• Highefficiencyfromlow260-mV

VREF• Simpleloopcompensation• SupportsversatileSEPICtopology




TPS40211 PMP3943

29

➔


TPS40211 PMP3943

3 Green and 1 Red OSRAM LEDs Used as Load for Vf About 12 V

VIN Volts IIN mA VOUT1 Volts IOUT1 mA Efficiency %

40.22 123.6 12.27 341.8 84.4

20.11 238.5 12.27 341.3 87.3

7.93 619.4 12.27 341.3 85.3

Regulation and efficiency: 25 degrres Celsius ambient. Target IOUT was 350mA, hence actual current is 2.5% low.

When Diode Load is Opened, VOUT Goes to About 18 V

VIN Volts IIN mA VOUT1 Volts IOUT1 mA

40.42 8.79 18.44 0

20.08 10.75 18.41 0

8.00 19.12 18.40 0

Short Circuit: Output Current Holds Steady

VIN Volts IIN mA VOUT1 Volts IOUT1 mA

40.14 21.24 0.694 341.6

20.06 34.20 0.694 341.5

8.00 77.70 0.694 341.4

Current Loop Frequency Response


TMS320C2000™ PLC Modem Evaluation Kit

TMDSPLCKIT-V1


TMDSPLCKIT-V1

30

➔

Description Power-linecommunication(PLC)isaninexpensivewaytoaddlightingcontroltoexistingornewbuildingsandinfrastructureswithoutlayingdownnewcontrolcabling.TheTMDSPLCKIT-V1isaPLCevaluationkitbasedontheC2000™seriesofreal-timemicrocontrollers.ItoperatesinbothOFDMandS-FSKmodulationschemesandhasdataratesofupto76.8kbps.

Thekitcomeswithaneasy-to-useGUIthatmakestestingthecommunicationslinkintuitiveandsimple.

Web Linkswww.ti.com/plcevm

Datasheets, user’s guides, samples:www.ti.com/sc/device/OPA564 orwww.ti.com/sc/device/PGA112

TMDSPLCKIT-V1 Block Diagram

Specifications• OFDMandS-FSKmodulation

schemes• Dataratesofupto76.8kbpsforone

phase(phaseselectionisprovided)• PLCsystemonmodule(SoM)

withinterfacetohostcontroller(I2C,SPI,SCI)

• CompatiblewithCENELECEN50065andIEC6100-3standards

• Operatingfrequencyrange:24to94.5kHz(CENELECAband.Bbandtoreleasein1Q10.)

• UniversalAC-voltageinput(85to270VAC)


PWM Out

Line Driver

OPA564

PGA112

Receive Filter

Surge Protector

Power Line

CouplingTransformerHV Cap

PLC Modem Implementation on TMS320F28x 32-Bit MCU - Simplified Block Diagram

12-BitADC

FlexiblePLCSW

Engine

TMS320F28x

NEW!



TMDSPLCKIT-V1

31

➔


TMDSPLCKIT-V1PLC Data Signal

50- or 60-Hz Power Line

PLC Signal Modulated Onto the Power Line 50/60Hz


Digital Addressable Lighting Interface (DALI)

DALI Implementation with the MSP430™ MCU

32

➔

Description Intelligentlightingcontrolcanprovidelargeefficiencygainsandenergysavings.Thedigitaladdressablelightinginterface(DALI)standardisbecomingincreasinglypopularforthisapplication.

TheDALIevaluationkitenablesthedesignertorunDALIonthepopularMSP430seriesofmicrocontrollers.SoftwarelibrariesandhardwarereferencefilesareprovidedtoallowquickevaluationanddevelopmentwiththeDALIstandard.

Web LinksApplication Note:www.ti.com/lit/SLAA422

MSP430-Based DALI Reference Design

Specifications• Fullhardwarereferencefiles,

includingschematics,GerberfilesandBOM

• Fullsoftwarelibraries• SupportfortheentireDALI

commandset,includingbidirectionalcommands


DALI+

DALI—

GND

1

2

4

3

MSP430™MCU

GND

1

2

4

3

NEW!

TexasInstruments2Q2010 LED Cookbook

33

➔

DC/DC LED Developer’s Kit

TMDSDCDCLEDKIT

Digital Addressable Lighting Interface (DALI)

DALI Implementation with the MSP430™ MCUDescription TheDC/DCLEDDeveloper’sKitincludesallofthehardwareandsoftwaretostartexperimentingwithanddevelopingadigitallycontrolledLEDbacklightingsystem.ThekitisbasedonthePiccolo™microcontrollerandthecontrolCARD™developmentplatform.OnePiccoloMCUisabletodirectlycontroltheDC/DCpowerstageaswellaseightLEDstrings.Thedevelopmentboardtakes12to48VDCofinputandusesaSEPICDC/DCtopologytobuckorboosttheinputvoltagetoadesiredlevel.ThisvoltageisthenfedtofourLED-drivingstages,eachcapableofdrivingtwoLEDstringsatupto30Weach.Thekitincludesclosed-loop,open-sourcesoftwareforboththeDC/DCstageandtheLED-lightingstage.Thekithardwareisalsocompletelyopen-source,withtheGerberfiles,

Web LinksDatasheets, user’s guides, samples:www.ti.com/c2000tools

Typical Application Schematic

schematicsandBOMsallavailableforfree.Formoreinformation,pleaseseethequick-startguideforthekit.TodownloadtheLEDsoftware,pleasevisit:www.ti.com/c2000tools

Key Features• 12-to24-VDCinputtoSEPICDC/DC

stage,12-to40-VDCoutput• FourLED-driverstages,eachcapable

ofdrivingtwostringsat30W• LED-driverstagescanbeexternally

powered• Piccolo-basedcontrolCARD

developmentplatform• Open-sourcehardware,including

Gerberfiles,schematicsandBOMs• Closed-loopDC/DCandLED-driving

software,completewithsourcecodeanddocumentation

DC12 V to 48 V

Sepic

Piccolo™

CPU32 bit

PWM-1A

B 2

1

2

PWM-1A

B

3

4

PWM-1A

B

5

6

PWM-1

I2CSPI

UART

A

B

7

8

3

1

3

2

3

4

8

9

1

+

+

2

3

13

ADC12 bit

VREF

33

NEW!


34

➔

Description TheTPS61165operatesovera3-to18-Vinputsupplyanddeliversanoutputvoltageupto38V.Withits40-VratedintegratedswitchFET,thedevicedrivesupto10LEDsinseries.Itoperatesata1.2-MHzfixedswitchingfrequencytoreduceoutputripple,improveconversionefficiency,andallowfortheuseofsmallexternalcomponents.Thedefaultwhite-LED(WLED)currentissetwiththeexternalsensorresistorRSET,andthefeedbackvoltageisregulatedto200mV.IneitherdigitalorPWMdimming,theoutputrippleofTPS61165attheoutputcapacitorissmallanddoesnotgenerateaudiblenoisesassociatedwithcommonon/offcontroldimming.Forprotectionduringopen-LEDconditions,theTPS61165disablesswitchingtopreventtheoutputfromexceedingtheabsolutemaximumratings.

ThePMP3598usestheTPS61165inanonsynchronousboostconfiguration.Anadditionalcircuitbuiltaroundtheopampprovidesthebatteryunder-voltage/chargingindicationsandalsoprovidesORingbetweenthesolarpanelandbatteryinputs.Thecircuitalso

PMP3598 Schematic



Input Voltage 4.5 6 7.4 Volts

Output Voltage 10.45 10.5 10.65 Volts

Output Ripple — — 50 mV pp

Output Current 0 — 350 mA

Switching Frequency — 1200 — kHz

J1 D1BAT54C

D3BAT54C

R11K

D5MBRS120

R181

R161

R6169K

R11226K

R9169K

R34.42K

R42.25M

R210K

R54.42K

U1:BTL103WID

U2

TP

S61

165D

RV

D6BZX84C18T

R1310K

R8Open

D4IN5820

R121K

R2151.1

C22.2µF

C30.22µF

C43.3µF

R1459K

R15100K

R10162K

R176.81K

RT122K

R7100K

C10.1µF

Q1Si2343DS

TP

1

TP

2

TP

5

12

23

65

1 2 3

6 5 4

7

1 2 3 4 5 6 7 8

J41

2

J31

2

L110µH

TP3

TP4 To 28K POT

LED ALED C

R202.61K

4

5

7

FB CO

MP

GN

D

VIN

CT

RL

SW

Pw

Pd

incorporatesthenecessarythermalandovercurrentprotectionsandhasload-disconnectfeature.

KeyconsiderationsforthisdesignarehighefficiencyandgoodLED-currentregulation.TheTPS61165operatesinaconstant-currentmodetoregulatetheLEDcurrent.TheCTRLpinisusedforthecontrolinputforbothdigitalandPWMdimming.ThedimmingmodefortheTPS61165isselectedeachtimethedeviceisenabled.Analogdimminghasbeenimplementedbyvaryingthefeedbackreference.A20-kWvariableresistorcanbeusedtovarytheLEDcurrenttoachievedimming.Theconverterboosts6to10.5Vat350mAandhasminimumconversionefficiencyof85%.Thiscircuitis

usedfordrivingthree1-WLEDsormultiple50-mALEDswhostotalpowerinputdoesnotexceed3W.

Key Features• Boostoutputupto38Vout• Widesupplyvoltage3Vto18V• Highefficiencyfrom200-mV threshold• PWMdimming• LEDopenprotection• 350-mALEDcurrent


Datasheets, user’s guides, samples:www.ti.com/sc/device/TPS61165

3-Watt Solar Lantern

TPS61165 PMP3598


3-Watt Solar Lantern

TPS61165 PMP3598

35

➔

Switching Waveform

Open LED Protection

Efficiency

Output Ripple


High-Brightness LED Driver with Switch Control

TL4242


TL4242

36

➔

Description High-brightnessLEDsarebecomingmoreandmoreprevalentinallfacetsoflife.Lineardriversaregreatforsimpleapplicationsthatdonotrequireveryhighefficiencyandforapplicationsthatmusthavelittleornoelectromagneticinterference(EMI).Pulse-widthmodulation(PWM)isusedfordimminginsomeoftheseapplicationsbutcanalsointroduceEMI.ThisreferencedesignusesasimplelinearLEDdriverforhigh-brightnessapplicationsanddemonstratesoneofseveralmethodsofcontrollingdimmingwithouttheintroductionofEMI.

TheTL4242isalinearconstant-currentsingle-channelLEDdrivercapableofsourcingupto500mA.TheTL4242iscapableofrunningfromasupplyofupto42VsothatalargeLEDstringcanbedriventhroughasingledevice.Figure1showsasimpleexampleoftheTL4242usedtodrivefourLEDs(typicalVF=3.5V).Inthisdesign,thePWMpinisusedonlytoenableanddisabletheTL4242.Thecurrentissetthroughaverysimplerelationshipbetweenthesenseresistor(RREF)andthevoltageattheREFpin(VREF):

IOUT=VREF/RREF

TheTL4242’stypicalVREFis0.177V.IfRREFissetto2W,thenthecorrespondingIOUTwillbe88.5mA.

IntheapplicationinFigure1,the18-VsupplycurrentisfeddirectlyintotheTL4242forLEDcurrent.TheTL4242alsomonitorstheLEDstringforanopenconditionandsetsthestatus(ST)pinifanopenisdetected.

ToenabledimmingwithoutPWM,RREFmustbechangedandiseasilymanipulatedwithasimpleanalogswitch.TheTS3A4742ischosen(seeFigure2)becauseofitslow(typically0.7-W)RON,high-current(100-mA)capability,dual-switchconfiguration

350mA.ChangingRREFP,RREFS1andRREFS2providesawidevarietyofdimminglevels.RREFS1andRREFS2mustbechosenwiththeRONoftheswitchinmind.Notethateachleghasthesamecurrentwhenitison,regardlessoftheotherlegs’current.

Figure 1. Simple TL4242 LED Drive Circuit

Figure 2. TS3A4742 Dual, Normally Closed Analog Switch Provides Four Brightness Levels

andnormallyclosedoperation.Caremustbetakentokeepthechannelcurrentunder100mA.

Figure2demonstratestheTL4242usedwiththeTS3A4742toproduceanLEDdimmingcircuitcapableofswitchingbetween200,250,300and


RREF

C147nF

+18V

10KΩ

TL4242 Q

REF

I

TPS7A4533

IN SHDN

GND SENSEOUTSTPWM

GND D

Controller

RREFP

C147nF

RREFS1RREFS2NC1

+3.3V

IN1

NC2IN2

COM2

COM1

+18V

10KΩ

3.3V

V+

GND

TS3A4742

TL4242 Q

REF

I

TPS7A4533

IN SHDN

GND SENSEOUTSTPWM

GND D

Controller

Switched Reference Resistors

Primary ReferenceResitor (RREFP) (RREFS1) (RREFS2)

Equivalent Resistance (RREF)

Nominal Output Current (IOUT)

0.885 W 1.77 W 3.54 W 0.506 W 350 mA

0.885 W 1.77 W Open 0.590 W 300 mA

0.885 W Open 3.54 W 0.708 W 250 mA

0.885 W Open Open 0.885 W 200 mA

Note: RREFS1 and RREFS2 include RON of the TS3A4742.

NEW!



TL4242

37

➔


TL4242

Figure 4. Switches in Series

Figure 3. Analog-Switch Brightness Control

Simple Pushbutton 1

RREFP RREFS1

NC1

+3.3V

IN1

NC2IN2

COM2

COM1

+3.3V

+18V

10KΩ

Simple Pushbutton 2

V+

GND

TS3A4742

TL4242 Q

REF

I

TPS7A4533

IN SHDN

GND SENSEOUTSTPWM

GND D

RREFP

C147nF

RREFS

NC1

+3.3V

IN1

NC2IN2

COM2

COM1

+18V

10KΩV+

GND

TS3A4742

TL4242 Q

REF

I

TPS7A4533

IN SHDN

GND SENSEOUTSTPWM

GND D

Controller

ChoosingadualswitchwithalowRONallowstheusertoconnectbothchannelsinparallel,therebyreducingtheeffectiveRON.ThisparallelapproachcanreducetheTS3A4742’stypicalRONto0.35W.Figure3showsanexampleusingthisparallelapproachtogenerateadual-brightnessdesign.Thisapplicationusesa0.65-Wresistor(RREFS1)inserieswithbothswitches,creatinganeffectiveRREFof1-W.Thislegwillsink177mA(88.5mAthrougheachswitch)whenon.Caremustbetakentokeepthecurrentthroughtheanalogswitchbelowthemaximumallowed.Additionally,thepowerdissipationintheswitchpackagemustbeconsidered.InthecaseoftheTS3A4742,themaximumcontinuouscurrentis100mAperchannel.Figure3alsoremovesthecontrollerandreplacesitwithsimplepush-buttonswitches.Thisdesignallowsasinglebutton(orothermanualcontrol)toenabletheLEDs(simplepush-button1)andanothertosetthebrightnesslevel(simplepush-button

2).Thisisasimpleautomotivetail-lightsolutionforon/offandbraking.ThetaillightisonwhenPWMishigh(push-button1isnotdepressed).Thebrightnessofthetaillightisnormalwhenpush-button2isnotdepressedandbrighterwhenitisdepressed.

Anotheroptionistohookuptheswitchesinaserialmanner(seeFigure4),therebydoublingthe

resistanceto1.4W.Thisalsopermitsdualbrightness;butthecurrentthroughtheTS3A4742islimitedto100mAperchannel,sothebrightnesswillbelowerthanwhenthechannelsareinparallel.

Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TL4242

Primary Reference Resistor

(RREFP)

SwitchedReference Resistors(RREFS1 + RREFSwitch)

Equivalent Resistance (RREF)

Nominal Output Current

(IOUT)

1 W 1 W + 1.4 W = 2.4 W 1.09 W 162 mA

1 W Switch Open 2 W 88.5 mA

.


High-Brightness LED Driver with Single-Clock Operation

TLC5917


TLC5917

38

➔

Description TheTLC5917isan8-channel,constant-currentLEDdrivercapableofupto120mAperchannel.ThisisagreatfitwhenanapplicationrequiresaconstantLEDcurrentthatisindependentofinputvoltage,temperatureanddifferencesinLEDforward-voltagedropsresultingfromuncontrolledmanufacturingprocesses.Theoutputscanalsobetiedinparallelwhenneededtodrivehigh-brightnessLEDs.Communicationisaccomplishedthroughabasicserialport.Manyapplicationsdonothavethecapabilityforgeneratingevensimpleserialcommands.Thisreferencedesignallowsausertoovercomethisissuewithasimple555timer.

TheTLC5917driveseightindependentconstant-currentsinks.Normally,amicroprocessordrivesthe/OE(outputenable),SDI(serialdatainput),CLK(clock)andLE(latch)pinswithfourseparateGPIOpins,whichallowsthecurrentsinktobeindependentlyturnedonandoff.IfindependentLEDcontrolisnotneeded,theTLC5917canbeturnedonwithasingleclocksignalora555timer.• /OE(outputenable)—Thispin

enablesanddisablesalloutputs.• SDI(serialdatainput)—Thedata

clockedintothispinprogramseachoutputtobeonoroff.

Figure 1. TLC5917 Driven by 555 Timer

LEDson.PullingSDIlowturnsallLEDsoffaftereightclockcycles.Figure2showshowtheTLC5917respondstoturn-onandturn-offwhenitisconfiguredasshowninFigure1.NotethatFigure1showsalltheTLC5917outputsconnectedinparalleltodriveasinglehigh-brightnessLED.TheTLC5917outputscaneitherdriveeightindependentLEDsorbeconnectedinparalleltodrivehigher-powerLEDs.InFigure1,R3=178W,whichsetseachoutputcurrentat105.3mA.Connectingalloutputsinparallelyields105.3mAx8=842.4mAofLEDcurrent.

Thissameapproachcanbeusedforanyofthe8-and16-channelTLC59xxfamilies,includingtheTLC5916/25/26/27andTLC59025.

Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TLC5917

• CLK(clock)—TherisingedgeoftheclockshiftsSDIdataintointernalshiftregisters.

• LE(latch)—ThefallingedgeofLElatchesdatafromtheinternalshiftregistersintotheinternalon/offlatches.

CloseexaminationoftheTLC5917timingdiagramrevealsthatasinglePWMsignalcanreplacetheCLKandLEinputsbecausetherisingedgeofCLKshiftsdataintotheICandthefallingedgeofLElatchesthedata.Figure1showshowtoconfiguretheTLC5917tooperatefromasingleclocksignal.

/OEmustbeconnectedtogroundtoenabletheIC.TheSDIpincanbeconnectedtoVCCtoshift1’sintotheICtoturnalloutputson,andcanbeconnectedtogroundtoshiftall0’sintotheICtoturnalloutputsoff.TheCLKandLEpinscanbeconnectedtoanytypeofPWMsignal.Turn-onandturn-offtimeswiththiscircuitdependontheclockfrequency.Atpowerup,theTLC5917’sinternalon/offlatchesthatturneachoutputonoroffdefaultto“0”,sotheselatchesmustbesetto“1”beforetheoutputsturnon.Eachrisingandfallingedgeoftheclocksignalsequentiallyturnsoneachoutput,startingwithOUT0.Therefore,ittakeseightclockcyclestoturnall

U2TLC5917PW

ON/OFF Control

ON/OFF

R3178

C30.1µ

C40.1µ10kHz Clock

C20.1µ

C11500p

R220.0k

R137.4k

Outputs connected in parallel for 842mALED current

High PowerLED

OUT0

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

OUT7

VDD

CLK

LE(ED1)

(ED2)OE

SDI

SDO

R-EXT

GND

U1TLC555D

VCC

RESET

DISCH

THRES

TRIG

GND

OUT

CONT

16

3

4

13

2

14

15

1

8

4

7

6

2

1

3

5

5

6

7

8

9

10

11

12

VCCVCC

NEW!



TLC5917

39

➔

Figure 2. LED’s Turn-On and Turn-Off Responses with 10-kHz Clock



Wireless-Controlled Triple LED Driver

TPS62260 TPS62260LED

40

➔

Description Residentialandcommerciallightingcantakeadvantageoftheadditivecolormixingofred,greenandblueLEDs.ThisreferencedesigndemonstrateshowtoremotelymanagethecoloroutputofanLEDlampwithalow-powerwirelesscontroller.ThecolorisgeneratedbythreeLEDs(red,greenandblue).AnMSP430™ultralow-powermicrocontrollercontrolsthebrightnessofeachLEDwithconstantcurrentgeneratedbythreeTPS62260buckconverters,oneforeachLED.

Thecolorlook-uptabletakestheformofanarraystoredintheMSP430.Whenevertherotaryencoderisturned,newred,greenandbluevaluesarereadfromthearrayandusedtogeneratethethreePWMoutputsignals.Currently252valuesarestored,whichcanbechangedifdesired.Adecimalvalueof100switchestheLEDoff,andavalueof65535producesamark-spaceratioof100%.Whenthe5-Vsupplyisapplied,

MSP-FET430UIFtoolscanbefoundrespectivelyat:

http://focus.ti.com/docs/toolsw/folders/print/ez430-rf2500.html andhttp://focus.ti.com/docs/toolsw/folders/print/msp-fet430uif.html

Key Features• WirelessRGBcolormixing• Ultra-low-powerMSP430controller• Wirelessdevelopmenttoolavailable


EVM:www.ti.com/tps62260led-338

TPS62260LED-338 Schematic



Input voltage 4.5 5 5.5 VDC


U1MSP430F2131RGE

NCVSSXOUT/P2.7/CA7XIN/P2.6/CA6NM /RSTP2.0/ACLK/CA2P2.1/INCLK/CA3P2.2/CAOUT/TA0/C44P1.4/SMCLK/TCKNCP2.3/TA1/CA0P2.4/TA2.CA1NC PwPd

P2.5/CA5VCC

TESTP1.7/TA2/TDO/TDI

P1.6/TA1/TDI/TCLKNC

P1.5/TA0/TMS

P1.3/TA2P1.3/TA1P1.1/TA0

P1.0/TACLK

123456789

101112

2468

101214

654321

135791113

JP1

NET-DIMM_LED1NET-DIMM_LED2NET-DIMM_LED3NET-EN

242322212019181716151413

3.3V

3.3V

3.3V

R6100K

R3100K

R4100K

C310n

S1

R547K

C2100n

3.3V

JP2

eZ430=RF Connector

thedesigngoesintoademonstrationmodewherethevaluesstoredinthearrayarereadandoutputinsequenceinaninfiniteloop.Assoonastherotaryencoderisturned,thesequencestopsandaparticularfixedcolorvaluecanbeselected.

ThereisapinheaderthatcanbeusedtoplugintheRFboardfromtheMSP430WirelessDevelopmentTool(theeZ430-RF2500),whichisseparatelyavailable.Withthisadditionalmodule,thelamp’scolorscanbecontrolledremotelyviathewirelessRFinterface.

IfadesignerpreferstoreprogramtheMSP430,aseparateMSP430flashemulationtoolcanbeordered,suchastheMSP-FET430UIF.MoreinformationontheeZ430-RF2500and




TPS62260 TPS62260LED

41

➔


TPS62260 TPS62260LEDRed LED

Green LED

Blue LED



Input voltage 4.5 5 5.5 VDC


U11TPS62260DRV

red

<1206>

C1222µF

R122

R1110K

R1310K

D14

D13

TS4148RY

C114.7µF

1

C134.7µF ???mV

TP11

GNDVINEN

SWMODE

FBPwPd

654

123

7

TP12

TP13

VIN

L11

NET-DIMM_LED1

+5V

NET-EN

U21TPS62260DRV

green

<1206>

C2222µF

R222

R2110K

R2310K

D24

D23

TS4148RY

C214.7µF

1

C234.7µF ???mV

TP21

GNDVINEN

SWMODE

FBPwPd

654

123

7

TP22

TP23

VIN

L21

NET-DIMM_LED2

+5V

NET-EN

C14.7µF

D1BZX84-C3V3

C422µF

R2330

VINmax < 6V

+5VJ1123

3.3V

U31TPS62260DRV

blue

<1206>

C3222µF

R322

R3110K

R3310K

D34

D33

TS4148RY

C314.7µF

1

C334.7µF ???mV

TP31

GNDVINEN

SWMODE

FBPwPd

654

123

7

TP32

TP33

VIN

L31

NET-DIMM_LED3

+5V

NET-EN


Low-Voltage Buck Boost for LED Torch

TPS63000 PMP3038

42

➔

Description TheTPS63000providesapower-supplysolutionforproductsthatuseatwo-orthree-cellalkaline,NiCdorNiMHbattery,oraone-cellLi-IonorLi-Polymerbattery.Thebuck-boostconverterisbasedonafixed-frequencyPWMcontrollerthatusessynchronousrectificationtoobtainmaximumefficiency.Themaximumaveragecurrentintheswitchesislimitedtoatypicalvalueof1800mA,andtheconvertercanbedisabledtominimizebatterydrain.Duringshutdown,theloadisdisconnectedfromthebattery.Thedeviceispackagedina10-pinQFNPowerPAD™(DRC)packagemeasuring3x3-mm.ThePMP3038circuitwasdesignedforatorchorruggedflashlight.Mosttorchapplicationsstillusealkalinebatterieswithacommonconfiguration

Key Features• Buck-boostconvertertopology• Idealforbatteryapplications• 1.8-Aoutputcapability• Autobuck-boostmodeswitching• DualLEDbrightnesslevels• Operatesdownto1.2V


PMP3038 Schematic


Parameter Minimum Maximum Unit

Input voltage 1.2 5 VDC

Output voltage — 5 Volts

Output current 300 600 mAmp

Switch frequency — 1.5 MHz

+

U1TPS63000DRC

S1

NO

1.5V x 2BAT

C310µF

C41000pF

C122µF

C222µF

D17090 XR-E

THERMALPADC6DNP

R249.9K

R512.7K

R30.3

R40.3

R649.9

S2NC

NOD2LM4040D2.048V

R110K

NCL2

VOUT

PGND

FB

GND

4

5

8

7

6

2

1

3

10

9

11

L1

VIN

VINA

SYNC/PS

EN1PwPd

L12.2µH

oftwoorthreecellsinseriesthathaveamaximumvoltageof5V.Duringoperation,theVBATdropsbelowtheVfoftheLED,andtheTPS63000automaticallyswitchesfrombuckmodetoboostmodetocreatetheconstantcurrentneededfortheLED.TheTPS63000canboostfromvoltagesaslowas1.2V.AswitchthatbringsR4intooroutofthefeedbackloopprovidesadimmingmechanismfortheflashlighttotogglebetween300and600mA.




TPS63000 PMP3038

43

➔


TPS63000 PMP3038Output Current Graphs with DC Coupling

Efficiency Curve for IO = 0.32 A and IO = 0.62 A Turn On with 0.63 A

Control Loop Response Graphs

Output current with VIN = 3 V.

Control loop response with 0.63 A.

Output current with VIN = 4 V.

Control loop response with 0.32 A.

Efficiency.


Boost Driver with Integrated Power Switch

TPS61500

44

➔

Description TheTPS61500isamonolithicswitchingregulatorwithanintegrated3-A,40-Vpowerswitch.Itisanidealdriverforhigh-brightness1-or3-WLEDs.Thedevicehasawideinput-voltagerangetosupportapplicationswithinputvoltagefrommulticellbatteriesorregulated5-Vto12-Vpowerrails.

TheLEDcurrentissetwithanexternalsenseresistor,R3,andwithfeedbackvoltagethatisregulatedto200mVbyacurrent-modePWMcontrolloop,asshownintheschematicbelow.ThedevicesupportsanalogandpurePWMdimmingmethodsforLEDbrightnesscontrol.ConnectingacapacitortotheDIMCpinconfiguresthedevicetobeusedforanalogdimming,andtheLEDcurrentvariesinproportiontothedutycycleofanexternalPWMsignal.FloatingtheDIMCpinconfiguresthe

Key Features• Supportsboosttopology• Integrated3-A40-Vpowerswitch• SupportsPWMorAMdimming• Protectionfeatures: •Pulsebypulse •Thermalshutdown



LED Current vs. Input Supply and LED Number

Input Supply 5 V 12 V

LED number 4 1000 mA 2000 mA



Note: Assumption that LED forward voltage is 3.5V, and TPS61500’s conversion efficiency is 85%.

TPS61500

SW

SW

OVP

FB

PGND

PGND

PGND

VIN

EN

COMP

DIMC

FREQ

S3

AGND

PWM

VIN 5V L1 D1

C1 C2DL13W LED

DL2

DL3

DL4

C4R4

R1

R2

R3

C3

C5

ICforpurePWMdimming,withtheaverageLEDcurrentbeingthePWMsignal’sdutycycletimesasetLEDcurrent.

Thedevicefeaturesaprogrammablesoft-startfunctiontolimitinrushcurrentduringstart-upandhasotherprotectionfeaturesbuiltin,suchaspulse-by-pulseovercurrentlimiting,overvoltageprotectionandthermalshutdown.TheTPS61500isavailableina14-pinHTSSOPpackagewithPowerPAD™.




TPS61500

45

➔


TPS61500Efficiency vs. Output Current

PWM Dimming Application Circuit: Circuit for the TPS61500 to Perform Analog Dimming Using an Injected Analog Signal

Analog Dimming by External DAC: Pure PWM Dimming Method


Input Supply 5 V 12 V




Note: Assumption that LED forward voltage is 3.5V, and TPS61500’s conversion efficiency is 85%.

TPS61500

SW

SW

OVP

FB

PGND

PGND

PGND

VIN

EN

COMP

DIMC

FREQ

SS

AGND

DSP orµcontroller PWM

0 - 1.229V

VIN 5V L1 D1

C1

DL13W LED

DL2

DL3

DL4C4 C5

≥100nFR4

R1

R2

R3C3

OFF

ON

DAC

TPS61500

SW

SW

OVP

FB

PGND

PGND

PGND

VIN

EN

COMP

DIMC

FREQ

SS

AGND

PWM

VIN 5V L1 D1

C1

C2

DL13W LED

DL2

DL3

DL4C4

R4

R1

R2

R1

R2

R3

Q1

Q2

PWM

C3


1.5-A White LED Driver for Notebooks

TPS61180/1/2


TPS61180/1/2

46

➔

Description TheTPS61180/1/2ICsprovidehighlyintegratedsolutionsformedia-sizeLCDbacklighting.Thesedeviceshaveabuilt-in,high-efficiencyboostregulatorwithanintegrated1.5-A/40-VpowerMOSFET.Thesixcurrent-sinkregulatorsprovidehigh-precisioncurrentregulationandmatching.Intotal,thedevicecansupportupto60whiteLEDs(WLEDs).Inaddition,theboostoutputautomaticallyadjustsitsvoltagetotheWLEDforwardvoltagetoimproveefficiency.

Thedevicessupportpulse-width-modulation(PWM)brightnessdimming.Duringdimming,theWLEDcurrentisturnedon/offatthedutycycle,andfrequencyisdeterminedbythePWMsignalinputontheDCTRLpin.OnepotentialissueofPWMdimmingisaudiblenoisefromtheoutputceramiccapacitors.TheTPS61180/1/2familyisdesignedtominimizethisoutputACripple

overvoltageprotection,softstartingandthermalshutdown.

TheTPS61180ICrequiresanexternal3.3-VICsupply,whiletheTPS61181/2ICshaveabuilt-inlinearregulatorfortheICsupply.Allthedevicesareina3-x3-mmQFNpackage.

Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TPS61180,www.ti.com/sc/device/TPS61181orwww.ti.com/sc/device/TPS61182


acrosswidedimming-duty-cycleandfrequencyranges,thereforereducingtheaudiblenoise.

TheTPS61180/1/2ICsprovideadriveroutputforanexternalPFETconnectedbetweentheinputandinductor.Duringshort-circuitorovercurrentconditions,theICsturnofftheexternalPFETanddisconnectthebatteryfromtheWLEDs.ThePFETisalsoturnedoffduringICshutdown(trueshutdown)topreventanyleakagecurrentfromthebattery.Thedevicealsointegrates



Input voltage 4.7 — 24 Volts

Output voltage 15 — 38 Volts

Output ripple — — 200 mVPP

Output current 0 — 150 mA


Also Available Soon

Device Switch Channels Current per Channel LEDs per Channel

TPS61183 2.0 A 6 30 mA Up to 10

TPS61185 2.0 A 8 25 mA Up to 10

TPS61195 2.5 A 8 30 mA Up to 12

Preview products are listed in bold blue.

5V to 24V

EN

PWM Dimming

C14.7µF

C31µF

C40.1µF

R162kΩ

R251Ω

R3100kΩ

Optional

Q1

L110µH

C24.7µFD1 10 WLED in series, 120mA Total

TPS61181/2

SWFault

VO

IFB1

IFB2

IFB3

IFB4

IFB5

IFB6

PGND

GND

VBAT

CIN

DCTRL

EN

ISET

NEW!



TPS61180/1/2

47

➔


TPS61180/1/2Switching Waveforms Efficiency vs. PWM Duty

Start-up Waveforms Output Current vs. Dimming Duty Cycle

Output Ripple at PWM Dimming Output Ripple at PWM Dimming



Input voltage 4.7 — 24 Volts

Output voltage 15 — 38 Volts

Output ripple — — 200 mVPP

Output current 0 — 150 mA


Also Available Soon

Device Switch Channels Current per Channel LEDs per Channel

TPS61183 2.0 A 6 30 mA Up to 10

TPS61185 2.0 A 8 25 mA Up to 10

TPS61195 2.5 A 8 30 mA Up to 12

Preview products are listed in bold blue.



DRV9812


DRV9812

48

➔

Description TheDRV9812,whichhasawideinputvoltageofupto50V,isasynchronousmultichannelPWMpowerdriverforLEDapplications.Itcanbeconfiguredasbuck,boostorbuck/boost,dependingontheapplicationrequirements,andcandrive4independentLEDstringswithupto15powerLEDsinseriesperstring.ItcanalsoprovideDC,sine-wave,oranyotherkindofdesiredcurrenttodriveLEDsbasedonaPWMcontrolalgorithmfromanexternalMCUcontroller.

Becauseoftheintegratedlow-RDS(on)MOSFETsandintelligentgate-drivedesign,theefficiencyoftheDRV9812canbeashighas96%.Thedeviceoffersintegrated,on-chipsafeguards

TheDRV9812hasaunique,independentsupplypinforeachchannel,enablingittosupportmultipleoutputswithdifferentpower-supply-voltagerequirementsorwithmixedconvertertopologies.Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/DRV9812

DRV9812 Typical Application Schematic in Buck Configuration

againstawiderangeoffaultconditionssuchasshortcircuitsandovercurrentandundervoltageconditions.Italsooffersintegratedtwo-stagethermalprotection.Aprogrammableovercurrentdetectorprovidesanadjustablecycle-by-cyclecurrentlimittomeetdifferentpowerrequirements.



Input Voltage (V) 2 — 50

Output Voltage (V) 0 — 49.5

Gate Voltage (V) 11.4 12.3 13.2

Peak Output Current (A) — — 5

RMS Output Current (A) — — 2.5

Switching Frequency (kHz) — 10 to 500 1000

Real-Time MCU(TMS320F2802x/3x,

C2000™, etc.)

PWM

12VVIN

Up to 50V

VLED

ADC

DRV9812

DH_A

DH_B

DH_C

DH_D

BST_A

DL_A

BST_B

DL_B

BST_C

DL_C

BST_D

DL_D

VREG

GV

DD

_A

AG

ND

GN

D

GN

D_A

GN

D_B

GN

D_C

GN

D_D

GV

DD

_B

GV

DD

_C

GV

DD

_D

VD

D

RESET_AB

RESET_CD

PWM_A

PWM_B

PWM_C

PWM_D

FAULT

OTW

OC_ADJ

M1

M2

M3

AMP AMP AMP AMP


NEW!



DRV9812

49

➔


DRV9812

PWM Linearity Curve Efficiency Curve

DRV9812 Typical Application Schematic in Boost Configuration



Input Voltage (V) 2 — 50

Output Voltage (V) 0 — 49.5

Gate Voltage (V) 11.4 12.3 13.2

Peak Output Current (A) — — 5

RMS Output Current (A) — — 2.5

Switching Frequency (kHz) — 10 to 500 1000

PWM

12V

AMP

VIN

VLED Up to 50V

AMP AMP AMP

ADC

DRV9812

DH_A

DH_B

DH_C

DH_D

BST_A

DL_A

BST_B

DL_B

BST_C

DL_C

BST_D

DL_D

VREG

GV

DD

_A

AG

ND

GN

D

GN

D_A

GN

D_B

GN

D_C

GN

D_D

GV

DD

_B

GV

DD

_C

GV

DD

_D

VD

D

RESET_AB

RESET_CD

PWM_A

PWM_B

PWM_C

PWM_D

FAULT

OTW

OC_ADJ

M1

M2

M3

Real-Time MCU(TMS320F2802x/3x,

C2000™, etc.)


TPS61161

L1: TDK VLCF5020T-220MR75-1C1: Murata GRM188R61E105KC2: Murata GRM21BR71H105KD1: ONsemi MBR0540T1

VIN

CTRL

COMP

SW

FB

RsetR10Ω

20mA

C21µF

C11µF

L122µH

GND

D1

On/OffDimmingControl

VI 3V to 18V

C3220nF

Small LCD Backlight with Digital and PWM Dimming

TPS61160/1


TPS61160/1

50

➔

Description Witha40-VintegratedswitchFET,theTPS61160/1isaboostconverterthatdrivesupto10LEDsinseries.Theboostconverter,whichallowsfortheuseofhigh-brightnessLEDsingenerallighting,runsatafixedfrequencyof1.2MHzwitha0.7-Aswitch-currentlimit.

Asshownintheschematicbelowofatypicalapplication,thedefaultwhite-LED(WLED)currentissetwiththeexternalsenseresistor,RSET,andthefeedbackvoltageisregulatedto200mV.TheLEDcurrentcanbecontrolledviatheone-wiredigitalinterface(EasyScale™protocol)throughtheCTRLpin.Alternatively,aPWMsignalcanbeappliedtothe

Ordering Information1

TA Open LED Protection (typical) Package2 Package Marking

26 V TPS61160DRV BZQ–40°C to 85°C

38 V TPS61161DRV BZR

1For most current package and ordering information: www.ti.com/sc/device/TPS61160.2The DRV package is available in tape and reel. Add R suffix (TPR61160DRVR) to order quantities of 3,000 parts per reel or add T suffix

(TPS61160DRVT) to order 250 parts per reel.

Key Features• Efficientboosttopology• Integrated40-Vpowerswitch• Drivesupto10LEDs• PWMdimmable• 200-mVVREF• Noaudiblenoise



CTRLpinsuchthatthedutycycledeterminesthefeedbackreferencevoltage.IneitherdigitalorPWMmode,theTPS61160/1doesnotprovideLEDcurrentinburst;therefore,itdoesnotgenerateaudiblenoiseontheoutputcapacitor.Forprotectionduringopen-LEDconditions,theTPS61160/1hasintegratedcircuitrytopreventtheoutputfromexceedingtheabsolutemaximumratings.




TPS61160/1

51

➔


TPS61160/1

Ordering Information1

TA Open LED Protection (typical) Package2 Package Marking

26 V TPS61160DRV BZQ–40°C to 85°C

38 V TPS61161DRV BZR

1For most current package and ordering information: www.ti.com/sc/device/TPS61160.2The DRV package is available in tape and reel. Add R suffix (TPR61160DRVR) to order quantities of 3,000 parts per reel or add T suffix

(TPS61160DRVT) to order 250 parts per reel.

Efficiency vs. Output Current

PWM Dimming Output Ripple

PWM Dimming Linearity: FB Voltage vs. PWM Duty Cycle


Small LCD Backlight from LDO

TPS7510x

52

➔

Description TheTPS7510xlinearlow-dropout(LDO)LEDcurrentsourceisoptimizedforlow-powerLEDbacklightingapplicationssuchaskeypadsandnavigationpads.ThedeviceprovidesaconstantcurrentforuptofourunmatchedLEDsorganizedintwobanksoftwoLEDseachinacommon-cathodetopology.Withoutanexternalresistor,thecurrentsourcedefaultstothefactory-programmable,presetcurrentlevelwith±0.5%accuracy(typical).Anoptionalexternalresistorcanbeusedtosetinitialbrightnesstouser-programmablevalueswithhigheraccuracy.BrightnesscanbevariedfromofftofullbrightnessbyinputtingaPWMsignaloneachenablepin.Eachbankhasindependentenableandbrightnesscontrol,butthecurrentsofallfourchannelsarematchedconcurrently.Theinput-supplyrangeisideallysuitedforsingle-cellLi-Ionbatterysupplies,andtheTPS7510xcanprovideupto25mAperLED.Nointernalswitchingsignalsareused,eliminatingtroublesomeelectromagneticinterference(EMI).The

Device Specifications

Device VIN LEDs ∆IDX MAX VDO ∆IDX Packages

TPS7510x 2.5 V to 5.5 V 2 mm x 2 mm 25 mA 28 mV ±2% WCSP, DSK

TPS7510x Package Options

TPS7510xisofferedinanultra-small,9-ball,0.4-mmball-pitchwaferchip-scalepackage(WCSP)anda2.5x2.5-mm,10-pinSONpackage,yieldingaverycompacttotalsolutionsizeidealformobilehandsetsandportablebacklightingapplications.

Atfirstglance,usingalinearLDOcircuittodriveLEDsmayseemimpractical,giventhelinearregulator’sreputationforlowefficiency.However,theefficiencyofLDOsisoftenmisunderstood.LDOefficiencyisentirelybasedontheinput/output-voltageratio;therefore,theefficiencyofdrivingwhiteLEDs(WLEDs)canbequitehigh.Forexample,drivinga3-VWLEDfroma3.6-VLi-Ion-batteryinputtranslatesintoanLEDefficiencyof83%.

Figure 1showsatypicalapplicationfortheTPS75105.NotethatthisdevicerequiresnoexternalcomponentstodrivetheWLEDs.Thetotalsolutionisextremelysmallandverycosteffective.

Figure 2showstheTPS75105efficiencydataforseveraldifferentWLEDforwardvoltagesovertheLi-Ionbattery’srange.TheLEDefficiencyfortheTPS75105iscomparabletoorbetterthanthatofotherWLED-driversolutions.

Figure 3demonstratestheLEDefficiencyoftheTPS7510xovertheLi-Ionbattery’sdischargecurve.Theaverageefficiencyfortheentiredischargerangeisover80%forallthreecurves,andupto90%whenVLED=3.3V.

Key Features• Drivesfourconstantcurrentoutputs• PWMdimmable• 0.5%currentaccuracy• 25mAperLED• Ultra-smallsizeballpitchpackaging 83%efficientsolution





TPS7510x

53

➔


TPS7510x

Figure 2 - Efficiency Data

Figure 3 - LED Efficiency

Figure 1 - Typical Application

D1A

D2A

D1B

D2B

VIN

GND

ENA

ENB

ISET3.6VBattery

OFF

ON

OFF

Optional

ON


TPS61165

L1: TOKO #A915_Y-100MC1: Murata GRM188R61A475KC2: Murata GRM188R61E105KD1: OSRAM LW-W 5SM

VIN

CTRL FB

COMP

SW

RsetR57Ω

350mA

C21µF

C11µF

L110µH

GND

D1

On/OffDimmingControl

VIN 5V

C3220nF

Medium-Size LCD Backlight

TPS61165

54

➔

Description Witha40-VintegratedswitchFET,theTPS61165isaboostconverterthatdrivesuptotenLEDsinseries.Theboostconverter,whichallowsfortheuseofhigh-brightnessLEDsingenerallighting,runsatafixedfrequencyof1.2MHzwitha1.2-Aswitch-currentlimit.

Asshownintheschematicbelowofatypicalapplication,thedefaultwhite-LED(WLED)currentissetwiththeexternalsenseresistor,RSET,andthefeedbackvoltageisregulatedto200mV.TheLEDcurrentcanbecontrolledviatheone-wiredigitalinterface(EasyScale™protocol)throughtheCTRLpin.Alternatively,aPWMsignalcanbeappliedtotheCTRLpinsuchthatthedutycycle

Key Features• Boostconverterforhighefficiency• 40-Vintegratedpowerswitch• Drivesupto10LEDs• LowVrefforhighefficiency• Onewiredigitalinterface• PWMdimming• Noaudiblenoise




Input Supply 3 V 5 V 12 V

LED number 3 200 mA 350 mA 820 mA



Note: Assumption that LED forward voltage is 3.5 V, and TPS61165’s conversion efficiency is 80%.

determinesthefeedbackreferencevoltage.IneitherdigitalorPWMmode,theTPS61160/1doesnotprovideLEDcurrentinburst;therefore,itdoesnotgenerateaudiblenoiseontheoutputcapacitor.Forprotectionduringopen-LEDconditions,theTPS61165hasintegratedcircuitrytopreventtheoutputfromexceedingtheabsolutemaximumratings.

TheTPS61165isavailableinaspace-saving,2x2-mmQFNpackagewithathermalpad.




TPS61165

55

➔


TPS61165Efficiency vs. Output Current

PWM Dimming Linearity: FB Voltage vs. PWM Duty Cycle

PWM Dimming Output Ripple

Startup


Large-LCD Backlight Driver

TPS61195

56

➔

Description TheTPS61195provideshighlyintegratedsolutionsforlarge-LCDbacklights.Thisdevicehasabuilt-in,high-efficiencyboostregulatorwithanintegrated2.5-A,50-VpowerMOSFET.Theeightcurrent-sinkregulatorsprovidehigh-precisioncurrentregulationandmatching.Intotal,thedevicecansupportupto96whiteLEDs(WLEDs).Inaddition,theboostoutputautomaticallyadjustsitsvoltagetotheWLEDforwardvoltagetoimproveefficiency.

TheTPS61195supportsmultiplebrightness-dimmingmethods.DuringdirectPWMdimming,theWLEDcurrentisturnedon/offatthedutycycle,andthefrequencyisdeterminedbyanintegratedPWMsignal.InPWM-dimmingmode,thefrequencyofthissignalisresistor-programmable,whilethedutycycleiscontrolledfromanexternalPWMsignalinputfromaPWMpin.Inanalogmixeddimmingmodes,theinputPWMduty-cycleinformationistranslatedintoananalogsignaltocontroltheWLEDcurrentsignallinearlyoverabrightnessareaof12.5to100%.ThedevicealsoallowsPWM

TPS61195 Schematic


Parameter Minimum Maximum Unit

Input voltage 4.0 24 Volts

Output voltage 16 48 Volts

Number of channel — 8 —

Output current 0 0.32 Amp

Switching frequency 600 KHz 1 MHz —

TPS61195

VIN

4v ~ 24V

C14.7µF

C20.1µF

R240KΩ

R165KΩ

R4953KΩ

R646.4KΩ

R51M

C31µF

Up to 48VD1

R3523KΩ

200 Hz

L110µH

* 510Kohms resistance to ground.

SEL

VDDIO

Open

GND

R*

Interface

SMBus

PWM

PWM

PWM

DimmingMode

PWM

D-PWM

PWM

Mix Mode

AGND

VIN VIN

VDDIO PGND1PGND2

OVP

FDIM

IFB1IFB2IFB3IFB4IFB5IFB6IFB7IFB8

EN

DPWM

FDPWM

FSW

SEL

ISET

SDA

SCL

dimmingtobeaddedwhentheanalogsignalkeepstheWLEDcurrentdownto12.5%.Below12.5%,theanalogsignalwillbetranslatedintoPWMduty-cycleinformationtocontroltheon/offoftheWLEDcurrentandtoaveragetheWLEDcurrentdownto1%.

TheTPS61195integratesovercurrentprotection,short-circuitprotection,softstartandovertemperatureshutdown.Thedevicealsoprovidesprogrammableoutputovervoltageprotection,andthethresholdisadjustedbyanexternalresistor/dividercombination.

TheTPS61195hasabuilt-inlinearregulatorfortheICsupplyandisavailableina4x4-mmQFNpackage.

Key Features• Boostregulatorwithintegrated3-A

50-Vpowerswitch• Eightcurrent-sinkregulatorsfor

precisionintensitycontrol• Highefficiencythroughautomatic

VOUTtoLEDVforward• PWMdimming• Multipleprotectionfeatures: •Overcurrent •Shortcircuit •Overtemperature


Datasheets, user’s guides, samples:www.ti.com/sc/device/TPS61195


57

➔


TPS61195Dimming Efficiency VIN = 10.8 V; 9s8p

PWM Dimming Current Linearity VIN = 10.8 V Mixed Mode Dimming Waveform: 8% Brightness Mode

Mix Mode Dimming Current Linearity VIN = 10.8 V

Mixed Mode Dimming Waveform: 20% Brightness— Pure Analog


TPS61195


24-Channel, 12-Bit PWM LED Driver

TLC5951


TLC5951

58

➔

Description TheTLC5951isa24-channel,constant-currentsinkdriver.Eachchannelhasanindividuallyadjustable,4096-step,pulse-width-modulation(PWM)grayscale(GS)brightnesscontrol(BC)and128-stepconstant-currentdotcorrection(DC).TheDCadjustsbrightnessdeviationbetweenchannelsandotherLEDdrivers.Theoutputchannelsaregroupedintothreegroupsofeightchannels.Eachchannelgrouphasa256-stepglobalBCfunctionandanindividualGSclockinput.

GS,DCandBCdataareaccessibleviaaserial-interfaceport.DCandBCcanbeprogrammedviaadedicated


Typical Application Schematic (used when DCSIN/DCSCK Ports are used)

serial-interfaceport.TheTLC5951hasthreeerror-detectioncircuits:LEDopendetection(LOD),LEDshortdetection(LSD)andathermal-errorflag(TEF).LODdetectsabrokenordisconnectedLED,LSDdetectsashortedLED,andTEFindicatesanovertemperaturecondition.




Input voltage — 3.0 — 5.5 Volts

Output Voltage OUTR/G/B 0 to 7 3.0 — 17 Volts

Dot correction/global brightness control

— — 7/8 — Bits

Output current — 35 40 45 mA

Grayscale clock frequency — — — 33 MHz≈

≈≈

≈≈

≈

VLED

RIREF

GND

TLC5951ICn

OUTR0/G0/B0 OUTR7/G7/B7

VCC

GND

GSSIN

GSSCK

GSLAT

XBLNK

GSCKR

GSCKG

GSCKB

GSSIN

GSSOUT

DCSOUT

VCC

GND

GSSCK

GSLAT

DCSIN

DCSCK

XBLNK

GSCKR

GSCKG

GSCKB

IREF

GSSIN

READ DATA

DCSIN

READ DATA

DCSCK

GSController

DC/BC/FCController

VLED

GND GND

≈

6

RIREF

GND

TLC5951IC1

OUTR0/G0/B0 OUTR7/G7/B7

VCC

GND

GSSIN

GSSOUT

DCSOUT

VCC

GND

GSSCK

GSLAT

DCSIN

DCSCK

XBLNK

GSCKR

GSCKG

GSCKB

IREF

NEW!



TLC5951

59

➔

Output Current vs. Output Voltage Dot-Correction (DC) Linearity (IOLCMax with Lower Range)

Dot-Correction (DC) Linearity (IOLCMax with Upper Range) Constant-Current Output-Voltage Waveforms (Red Group)

Constant-Current Error vs. Ambient Temperature (Channel-to-Channel, Red Group)

Global-Brightness-Control (BC) Linearity (IOLCMax with Upper Range)


24-Channel, Constant-Current LED Driver

TLC5952 with Global Brightness Control



60

➔

Description TheTLC5952isa24-channel,constant-currentsinkdriver.Eachchannelcanbeturnedon/offwithinternalregisterdata.Theoutputchannelsaregroupedintothreegroupsofeightchannelseach.Eachchannelgrouphasa128-stepglobal-brightness-control(BC)function.

Bothon/offdataandBCarewritableviaaserialinterface.Themaximumcurrentvalueofall24channelsissetbyasingleexternalresistor.TheTLC5952hasthreeerror-detectioncircuits:LEDopendetection(LOD),LEDshortdetection(LSD)anda



thermal-errorflag(TEF).Theerrordetectionisreadviaaserialinterface.LODdetectsabrokenordisconnectedLED,LSDdetectsashortedLED,andTEFindicatesanovertemperaturecondition.




Input voltage — 3.0 — 5.5 Volts

Output Volatage OUTR/G/B 0 to 7 3.0 — 17 Volts

Global brightness control — — 7 — Bits

Output current — 29 32 35 mA

Data shift clock frequency — — — 35 MHz

≈≈

≈≈

+

TLC5952IC1

SIN

SCLK

LAT

BLANK

IREF

OUTR0

VLED

OUTB7

SOUT

VCC

GND

VCC

3

RIREF

DATA

SCLK

LAT

BLANK

ERRORREAD

RIREF

TLC5952ICn

SIN

SCLK

LAT

BLANK

IREF

OUTR0 OUTB7

SOUT

VCC

GND

VCC

Controller

NEW!




61

➔


TLC5952 with Global Brightness ControlOutput Current vs. Output Voltage (Red and Green Groups) Constant-Current Error vs. Output Current

(Channel-to-Channel, Red Group)

Constant-Current Error vs. Ambient Temperature (Channel-to-Channel, Red Group)

Constant-Current Output-Voltage Waveforms (red group)

Output Current vs. Output Voltage (Blue Group) Global Brightness-Control (BC) Linearity (Red and Green Groups)


16-Channel LED Driver with Load-Switch Dimming Control

TLC59116


TLC59116

62

➔

Description TheTLC59116isa16-channel,constant-currentLEDdrivercapableofsinkingupto100mAperchannel.Externalcurrent(IOUT)isprogrammedbyanexternalresistor(REXT).ThedevicehasaserialI2Cinterfaceandmultiplefunctions,someofwhichallowindividualpinblinkingandglobalbrightnesscontrol.InternalbrightnessandblinkingareaccomplishedbyusingtheTLC59116’sinternaloscillatortocreatedigitaldimming,commonlyreferredtoaspulse-width-modulation(PWM)dimming.TheTLC59116alsohasaninternalregisterthatcanbesettochangethebrightness“gain”from99.2%(thedefault)to8.3%.ThisreferencedesignallowsanyoftheseoptionstobeusedbutalsohasanaddedloadswitchformanipulatingtheREXTtochangebrightness.Thismethodcanalsobeusedtoproduceblinkingbetweendifferentbrightnesslevels,whichcannotbeachievedwiththeTLC59116alone.

LEDbrightnesscanbeprogrammedtochangedependingonthetimeofdayorthelevelofambientlight.LEDdimmingcanbeaccomplishedthroughanalogordigitalmethods.Inanalogdimming,thecurrentthroughtheLEDisreduced.Indigital(PWM)dimming,theLEDisturnedonandoffatahighfrequency.ThehumaneyeintegratestheonandoffbrightnessinsuchawaythattheLEDappearstodim.ChangingthefrequencyanddutycycleofthePWMsignalwillimpactthebrightness.Forexample,anLEDapplicationthatrequires40mAtobeatfullbrightnesswillbeat50%brightnessiftheanalogdimmingissetforadrivecurrentof20mAorifthePWMoperatesata50%dutycycle.Figure1showsthedifferencebetweenanalogandPWMdimming.FortheTLC59116LEDdriver,IOUTissetbytherelationshipbetweenthe

whichishigherthanthe0.9Vrequiredforoperation.

TheTPS22901’sdefaultis“on”anditsresistorisusedtocomputeIOUT,resultingin80mA.WhentheTPS22901isoff(theswitchisopen),theresultingcurrentchangesto40mA.ThehostMSP430controllercaneasilycontrolthefrequencyofthedim/full-brightnesstiming.TheTPS22900(dualloadswitch)canprovideuptofourbrightnesslevels.


externalresistorandtheREXTpin’sreferencevoltage(VREXT),asshowninequation1.

(1)IOUT=VREXT/REXTx15

Equation2solvesforREXT.

(2)REXT=VREXT/IOUTx15

ThedefaultVEXTvalueis1.25V.Theactualvalueisdependentonthebrightness“gain”setbytheuserviatheTLC59116’sinternalregister.Asaresult,anymanipulationofthecurrentbasedonREXTisstilldependentonthegain.

ChangingREXTchangestheresultingcurrent.Forexample,ifIOUTwassetto80mA,REXTwouldbe

(3)REXT=1.25V/80mAx15=234.

Similarly,a40-mAcurrentwouldresultinanREXTof468W.

Figure2showsabasicconfigurationforanLEDapplicationthatrequires40mAperchannel.The5-Vsupplyissteppeddownto3.3VbyasimpleLDOtodrivetheMSP430™controllerandtheTLC59116LEDdriver.The5-VsupplypowerstheLEDsdirectly.

BrightnesscontrolisenabledbyaddingaresistorinparallelwithREXT.Addinganother468-WresistorallowsIOUTtobedoubledfrom40mAto80mA.UsinganavailableGPIOlinefromtheMSP430totheloadswitchallowsthedesignertoaddorremovetheextraresistorasdesired.Figure3showsasimpleimplementationusingaTPS22901loadswitch.

TheTPS22901loadswitchfitsthisdimming-controlapplicationbecausetheRONisbelow100mW(negligibleinserieswith468W)andVREXTis1.25V,


NEW!



TLC59116

63

➔


TLC59116

Figure 1. Analog vs. PWM Dimming

Figure 2. Programmable LED Driver

TLC

5911

6

IN

+5V

+3.3V

REXT2468Ω

REXT2468Ω

SHDN

GND

SCL

ON

GND

VIN

VOUT

ON

SDA

RESET

OUTSENSE

TPS7A4533

MS

P43

0

TPS22901

ON = 234Ω = 80mAOFF = 468Ω = 40mA

OUT0

OUT1

OUT13

OUT14

OUT15

VDD

GND

REXT

A0-A3

RESET

SDA

SCL

+3.3V

TLC

5911

6

IN

+5V

+3.3V

REXT2468Ω

SHDN

GND

SCL

ON

SDA

RESET

OUTSENSE

TPS7A4533

MS

P43

0

OUT0

OUT1

OUT13

OUT14

OUT15

VDD

GND

REXT

A0-A3

RESET

SDA

SCL

+3.3V

Figure 3. Analog Dimming/Blinking with a Load Switch

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InternetTI Semiconductor Product Information Center Home Pagesupport.ti.com

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A042210

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Products Applications

Amplifiers amplifier.ti.com Audio www.ti.com/audio

Data Converters dataconverter.ti.com Automotive www.ti.com/automotive

DLP® Products www.dlp.com Communications and www.ti.com/communicationsTelecom

DSP dsp.ti.com Computers and www.ti.com/computersPeripherals

Clocks and Timers www.ti.com/clocks Consumer Electronics www.ti.com/consumer-apps

Interface interface.ti.com Energy www.ti.com/energy

Logic logic.ti.com Industrial www.ti.com/industrial

Power Mgmt power.ti.com Medical www.ti.com/medical

Microcontrollers microcontroller.ti.com Security www.ti.com/security

RFID www.ti-rfid.com Space, Avionics & www.ti.com/space-avionics-defenseDefense

RF/IF and ZigBee® Solutions www.ti.com/lprf Video and Imaging www.ti.com/video

Wireless www.ti.com/wireless-apps

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http://www.ti.com/communications

http://dsp.ti.com

http://www.ti.com/computers

http://www.ti.com/clocks

http://www.ti.com/consumer-apps

http://interface.ti.com

http://www.ti.com/energy

http://logic.ti.com

http://www.ti.com/industrial

http://power.ti.com

http://www.ti.com/medical

http://microcontroller.ti.com

http://www.ti.com/security

http://www.ti-rfid.com

http://www.ti.com/space-avionics-defense

http://www.ti.com/lprf

http://www.ti.com/video

http://www.ti.com/wireless-apps

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