over-voltage & over-current protection...

SunlordEXPERT IN PASSIVE PARTS

OverOver--voltage & Overvoltage & Over--current current Protection SolutionProtection Solution

2013.03


1.1. OverOver--voltage & Overvoltage & Over--current Treatcurrent Treat

2.2. Protection Solution on Power LinesProtection Solution on Power Lines

-- LED/TV/STB/LED/TV/STB/Energy MeterEnergy Meter//Security/Communication/ Security/Communication/ Industrial EquipmentIndustrial Equipment

3.3. Performance Comparison of overPerformance Comparison of over--voltage Protection voltage Protection ComponentsComponents

ContentContentContent


Over-voltage and Over-current Treat

OverOver--voltage and Overvoltage and Over--current current TreatTreat

Many equipments exhibitexcessive inrush currents when they are turned on which will cause system damage or fuse tripping.

Due to operation (such as switch on or off), fault or other reasons, the system may be changed from one state to another state and over-voltage may be produced by electromagnetic oscillation during this process.

The space around lightning has a strong alternating electromagnetic waves spreading outward divergently. In this case transient voltage will occur in cables or circuit.

Source

ConductionCurrent wave

( 2mS or 10/1000μS)

μS - mSSwitching

Over-voltage

ConductionCurrent wave SOver-

current

μS

DurationType Pulse wave Propagation mode

Lightning Induced

Over-voltage

Current wave(8/20μS) or

Voltage wave(1.2/50μS)

Electromagnetic induction,

Conduction

Over-voltage Carrier: Circuit, Network interface, Signal line interface.Over-current Carrier: Circuit.


Power NTC

Varistor

Varistor

Protection Components

SPNL （Leaded）

SDVL3216~5650(Chip)

VPR（Leaded）、VPL（Low profile leaded）、SDVL8063~10080(Chip)

Sunlord Part Number

Switching Over-voltage

Over-current

Type

Lightning Induced Over-

voltage

ProtectionProtection ComponentsComponents

SunlordEXPERT IN PASSIVE PARTSContentContentContent

1.1. OverOver--voltage & Overvoltage & Over--current Treatcurrent Treat



3.3. Performance Comparison of overPerformance Comparison of over--voltage Protection voltage Protection ComponentsComponents


1.2/50us Voltage Wave（without varistor）

Varistor

Signal/Power

GND

Varistor

V

t

Clamping Voltage

V

t

Withstand Voltage

With varistor

System rated voltage

Vdc

Circuit

/ Device

Principle of OverPrinciple of Over--voltage Protectionvoltage Protection


Power（AC/DC）

GND

Power NTC

CtCircuit

/ Device

Principle of OverPrinciple of Over--current Protectioncurrent Protection

SPNL13D Series

0.1

1

10

100

1000

-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150Temperature()

Res

ista

nce(Ω

)

SPNL13D150

SPNL13D080

SPNL13D1R5


R25, Permissible Max. Steady Current, Permissible Max. Capacitor

Max. Working Voltage,Clamping Voltage,Peak Current

Main Parameter

suppressing induced over-voltage cased by power and lightning;absorbing surge energy

VPR Series/ VPL Series / SDVL Series

Varistor

Suppressing surge current amplitude and no consumption of powerSPNL SeriesPower

NTC

Sunlord P/NType Effect

Application：Household appliances, LED Lighting, TV/STB, Switching Power Supply, Power adapter , Energy Meter and Industrial instrument.

Power（AC/DC）

GND

Power NTC

CtVaristorCircuit

/ Device

Protection PrincipleProtection Principle


400~1200A150~385Vac8063~10080Voltage Surge Suppression on AC

2500~4500A130~680Vac2004/3007/4505

Voltage Surge Suppression on ACVPL

100~6500A11~680Vacφ5~φ20Voltage Surge Suppression on ACVPR

Picture

150~1200A5.5~100Vdc3216~5650Voltage Surge Suppression on DC

SDVL

ApplicationSeries Size Working Voltage

Peak Current（8/20us）

Electrical Performance ShowElectrical Performance Show


Picture

150~200 50μF~810μF0.5A~12ASPNL

PermissibleMax. Steady CurrentSeries

PermissibleMax. Capacitor

Max. Steady Temperature

Picture

0.7Ω~30ΩΦ5~Φ20Current Surge

Suppression on AC/DC

SPNL

ApplicationSeries Size R25

Electrical Performance ShowElectrical Performance Show


Outdoor LED

Locaton

R25=20Ω, Imax=2A, Ct=150μFSPNL09D200M

Vdc=24V, Ip=400~800A, Et=1.7~3.7JSDVL4532SD300PT2

No. Sunlord P/N Main Parameter

1

SDVL10080KA301PT/VPR07KD300/ VPL1004KD300

Uac=220V, Vc=775V, Ip=1200A, Et=32.2J

SPNL09D200M R25=20Ω, Imax=2A, Ct=150μF

3 SDVL4532SD300PT Vdc=24V, Ip=400~800A, Et=1.7~3.7J

4 SDV1608H300C100NPT Vdc=24V, Cp=10~360pF

Application ExampleApplication Example--LED lightingLED lighting(Internal Power Module)(Internal Power Module)

Note: According to electromagnetic pulse source and energy pulse, SDVL may be omitted on ;According to design. SPNL may be omitted on or .2

21

AC-DC DC-DC IC Driver LEDTube

1 2 3 4L

N

RT RT


Outdoor LED

Locaton

R25=20, Imax=2A, Ct=150μFSPNL09D200M




4 SDV1608H300C100NPT Vdc=24V, Cp=10~360pF

Note: Power adapter provides DC power supply.

Application ExampleApplication Example--LED lightingLED lighting(External Power Module)(External Power Module)

DC-DC IC Driver LEDTube

2 3 4+

-

RT


Application ExampleApplication Example--TV/STBTV/STB




1

VPR14KD300BS or VPL3007KD300BS

Uac=220V, Vc=775V, Ip=4500A, Et=125J




21

AC-DC DC-DCIC

Driver

1 2 3L

N

RT RT


Application ExampleApplication Example--Energy MeterEnergy Meter

2

3Varistor

Antenna

Collector

Concentrator

Digital display

instrument

Low voltage supply


ESD protection for SIM and USB2.0SDV1005H260C030YP

Uac=220V, Vc=1120V, Ip=4500A, Et=130JVPR14KD420BS

2/3

ESD protection for SIM and USB2.0SDV1005H260C030YP

ESD protection for RS485SDV1005E5R5C101NP

Vdc=24V, Ip=400~800A, Et=1.7~3.7J(SMAJ/SMBJ/SMCJ on several power lines of collector and concentrator)

SDVL4532SD300PT



1

VPR14KD420BS Uac=220V,Vc=1120V, Ip=4500A, Et=130J


SDV1005E5R5C101NP ESD protection for RS485

Application ExampleApplication Example--Energy MeterEnergy Meter



Vsig≤3.6V, Ip=800～1000A, Et=1.9～4.0J, Cp＜1pf

For signal line: For signal line: SDMA SDMA (S(Schedulechedule))

4




1

VPR14KD300BS or VPL3007KD300BS

Uac=220V,Vc=775V, Ip=4500A, Et=125J


POEPOE Supply: Supply: SDVL4532SD650PTSDVL4532SD650PT Udc=65V, Vc=140V, Ip=600A, Et=4.0J

Application ExampleApplication Example--Security/CommunicationSecurity/Communication


21

AC-DC DC-DCIC

Driver

1 2 3L

NPort

Signal I/O4RTRT


RJ45 PortRJ45 Port

POE Supply

Application ExampleApplication Example--Security/CommunicationSecurity/Communication


Application ExampleApplication Example--Industrial EquipmentIndustrial Equipment





1VPR20KD300BS Uac=220V,Vc=775V, Ip=6500A, Et=220J

SPNL15D2R5M R25=2.5Ω, Imax=8A, Ct=330μF


21

AC-DC DC-DCIC

Driver

1 2 3L

N

RTRT

SunlordEXPERT IN PASSIVE PARTSContentContentContent

1.1. OverOver--voltage and Overvoltage and Over--current Treatcurrent Treat



3.3. Performance Comparison of OverPerformance Comparison of Over--voltage Protection voltage Protection ComponentsComponents


Varistor TVS

P/N Size（mm）Rated Power

P (W)Ip (A)8/20μS P/N Size

（mm）Rated Power

P (W)Ip (A)8/20μS

SDVL3216 3.2*1.6*1.05 500~780 250~300 SMAJ 5.0*2.5*1.9 400 3.0~195

SDVL3225 3.2*2.5*1.7 600~1600 300~400 SMBJ 5.4*3.6*2.3 600 4.5~293

SDVL4532 4.5*3.2*2.5 700~3000 600~800 SMCJ 8.0*6.0*2.3 1500 24.7~733

SDVL5650 5.7*5.0*2.5 1600~8500 900~1200 SMDJ 8.0*6.0*2.3 3000 92~1250

For the same performance, Chip Varistor’s size is very smaller than TVS’s size；Varistor has better performance on EMC effect, flame retardancy and temperature

characteristic than other over-voltage protection components.

VaristorVaristor vs. TVSvs. TVS


With the working voltage increasing, the pulse current through TVS drops dramatically; however, the pulse current through SDVL almost unchanged. So the varistor is more available to be used in lines with high voltage and high amplitude pulse current for suppressing over-voltage and absorbing surge energy.

Pulse Current vs. Working Voltage

0

50

100

150

200

250

300

350

5.5 9 14 26 38 48 56 65 85 100

Working Voltage Vdc（V）

Ip（

8/20μ

S）

（A）

SMAJ SDVL

Pulse Power vs. Working Voltage

200

300

400

500

600

700

800

900

5.5 9 14 26 38 48 56 65 85 100

Working Voltage Vdc（V）

P（

10/1000μ

S）

（W）

SMAJ SDVL



Varistor has transient resistance and can absorb part of energy, therefore it is good for EMC capability of device.

Varistor

Varistor

TVS / GDT / PESD

Signal/Power

Circuit

/ DeviceTVS/GDT/PESD

EMC Effect

Circuit

/ Device

Signal/Power

TVS, GDT and PESD have no capability of absorbing ESD energy which may occur in the circuit and cause EMI.

VaristorVaristor vs. TVS/GDT/PESDvs. TVS/GDT/PESD


Pulse Current vs. Temperature

Chip varistor is a good hot conductor, has excellent heat dissipation capacity, and can keep stable temperature characteristics at 85.

Because of material performance, the temperature characteristics of TVS deratedfrom 25.

Temperature Characteristic


over-voltage & over-current protection...

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