confidential on-bright · 2018. 3. 21. · ©on-bright electronics confidential ob_doc_dbm_3652m00...

©On-Bright Electronics Confidential OB_DOC_DBM_3652M00

1

3LEDs Lighting Application Using OB3652M

LD12V0.3A3652M.00

Subject

OB3652M Demo Board Manual Board Model: LD12V0.3A3652M.00 Doc. No.: OB_DOC_DBM_3652M00

Key Features

Cost effective and simplified system design

Without auxiliary winding, primary no RCD, second no RC design

Accurate primary-side constant current controller without secondary side control and

opto-coupler

Small size for GU10/E27 1x1W to 3x1W LEDs lighting (L*W =25mm*16mm)

High Precision output current regulation

Audio noise free operation

Short circuit protection, over voltage protection and over temperature protection

Revision History

Revise Date Version Reason/Issue

2013-8-29 00 First issue

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Contents Index

1 LED Lighting Specification ................................................................................................................ 3 1.1 Input Characteristics ..................................................................................................................... 3 1.2 Output Characteristics .................................................................................................................. 3 1.3 Performance Specifications .......................................................................................................... 3 1.4 Protection Features ...................................................................................................................... 3 1.5 Environments ................................................................................................................................ 3

2 LED Lighting Information ................................................................................................................... 4 2.1 Schematic ..................................................................................................................................... 4 2.2 Bill of material ............................................................................................................................... 4 2.3 PCB Gerber File ........................................................................................................................... 5 2.4 Transformer Design ...................................................................................................................... 6 2.4.1 Transformer Specification ........................................................................................................ 6 2.4.2 Transformer Winding data ....................................................................................................... 6 2.5 Module Snapshot .......................................................................................................................... 6

3 Performance Evaluation ..................................................................................................................... 7 3.1 Input Characteristics ..................................................................................................................... 8 3.1.1 Efficiency ................................................................................................................................. 8 3.1.2 Thermal Test ............................................................................................................................ 8 3.2 Output Characteristics .................................................................................................................. 9 3.2.1 LED Current Regulation .......................................................................................................... 9 3.2.2 Current Ripple........................................................................................................................ 10 3.2.3 Current overshoot ................................................................................................................... 11 3.2.4 Time Sequence....................................................................................................................... 11 3.3 Waveform at normal/ start/output open/output short .................................................................. 12 3.3.1 MOSFET VDS and Secondary Rectifier VAK ........................................................................... 12

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LD12V0.3A3652M.00

1 LED Lighting Specification

1.1 Input Characteristics

AC input voltage rating 100Vac ~ 240Vac

AC input voltage range 90Vac ~ 264Vac

AC input frequency range 47Hz ~ 63Hz

1.2 Output Characteristics

Output Current 0.3A

Output Voltage 12V

1.3 Performance Specifications Max. Output Power 3.6W

Efficiency >70% @ Max. Output Power

Turn on Delay Time 0.3Sec. Max. @90Vac with full load

1.4 Protection Features

Short Circuit Protection Output shut down with auto-recovery

Over Voltage Protection Output shut down with auto-recovery

Over Temperature Protection Output latched with frequency decreases to half

1.5 Environments

Operating Temperature 0℃ to +40℃

Operating Humidity 20% to 90% R.H.

Storage Temperature -40℃ to +60℃S

Storage Humidity 0% to 95% R.H.

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LD12V0.3A3652M.00

2 LED Lighting Information

2.1 Schematic

2.2 Bill of material No. Position Description Quantity Remark

1 R1,R2 RES SMD 1206 240K±5% 2

2 R3 RES SMD 1206 2R±1% 1

3 R4 RES SMD 0805 10K±5% 1

4 C1 EC 4.7uF/400V 105℃ 1

5 C2 CAP SMD 0805 1uF/16V 1

6 C3 EC 10uF/50V LOW ESR 1

7 BD1 HD06 0.8A 600V SMD 1

8 D6 US1D 1A 200V SMA 1

9 F1 1A/250V 1 （微型小体积

3*7mm）

10 T1 Transformer EE10 Lp: 1.6mH 1

11 U1 OB3652M SOP-8 1

TOTAL 12

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2.3 PCB Gerber File

Top Silkscreen

Top

Bottom Silkscreen

Bottom

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LD12V0.3A3652M.00

2.4 Transformer Design

2.4.1 Transformer Specification

Bobbin

Pri

8

5

4

Sec

1

Note: 1) Bobbin: EE10 卧式(8Pin)

2) Core material: PC40 (TDK).

3) L(1-4) = 1.6mH±7% (10KHz,1V,25℃)

4)Cut pin(3,6,7)

2.4.2 Transformer Winding data Step Winging Material Start Turns Finish Remark

1 N2 2UEW Φ0.13×1 4 41 →

2 N2 2UEW Φ0.13×1 → 41 →

3 N2 2UEW Φ0.13×1 → 41 1

4 TAPE 6.2mm 2

5 N1 2UEW Φ0.21×2 8 24 5

6 TAPE 6.2mm 2

Note: Black dot is start

2.5 Module Snapshot

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3 Performance Evaluation Characterization Results Summary

Test Item Test result

1. Input characteristics

Efficiency (115/230 Vac,3LEDs load) 81%/77.5%

2 .Output characteristics

Current overshoot 0%

3. Time sequence (90Vac, Full load)

Turn on delay time 57mS

4. Protections

Short Circuit protection OK

Over Voltage protection OK

Over Temperature protection OK

Test Equipments

Item Vender Module

AC Source: WEST WEW1010

Digital Power Meter YOKOGAWA WT210

Electrical Load Prodigit 3315C

Oscilloscope LeCroy WS424

Multimeter VICTORY VC9807A

Thermal FLUKE HS2

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3.1 Input Characteristics

3.1.1 Efficiency

Efficiency Vo/V VIN=90Vac VIN=115Vac VIN=230Vac VIN=264Vac SPC

3V 65.63% 65.51% 58.34% 55.79%

6V 75.37% 75.97% 70.45% 67.85%

9V 79.14% 79.71% 75.45% 75.53% >70%

12V 80.53% 81.00% 77.50% 76.00%

Efficiency

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

VIN=90Vac VIN=115Vac VIN=230Vac VIN=264Vac

Input Voltage(Vac)

Eff

icie

ncy(

%)

VO=3V

VO=6V

VO=9V

VO=12V

Efficiency vs. Output 1W to 3.6W

3.1.2 Thermal Test

Item VIN=90Vac VIN=264Vac

Transformer T1 (EE10) Primary winding (OC) 58 68

IC U1 (OB3652M) Package (OC) 60 77

DIODE D6 (US1D) Package (OC) 77 80

Note: Thermal performance was measured by putting the power inside a box, protected from air flow. An ambient thermal probe was placed about one inch away from the power and ambient degree is 25℃ Thermal test after the power had worked for an hour under full load condition(12V/0.3A)

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3.2 Output Characteristics

3.2.1 LED Current Regulation Line Regulation

Vout/Vdc Iout (mA)

90Vac/60HZ 115Vac/60HZ 230Vac/50HZ 264Vac/50HZ Precision VS

VIN 3V 315 321 317 318 ±0.95% 6V 309 314 310 311 ±0.81% 9V 306 310 306 308 ±0.65% 12V 302 306 301 304 ±0.83%

Precision VS Vout ±2.15% ±2.45% ±2.66% ±2.30%

260

280

300

320

340

360

90 115 230 264

Input Voltage(Vac)

Out

put

curr

ent(

mA

)

VO=3V

VO=6V

VO=9V

VO=12V

Output Current vs. Output 1W to 3.6W

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3.2.2 Current Ripple Current Ripple measure results

Input Voltage Current Ripple 90Vac/60HZ 107mA

264Vac/50HZ 119mA

Current ripple waveform

VIN=90Vac,LED load VIN=264Vac,LED load

CH1: CH2: CH1: CH2:

CH3: CH4: ILED CH3: CH4: ILED

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3.2.3 Current overshoot

Current overshoot measurement results Input Voltage Current overshoot

90V/60Hz 0% 264V/50Hz 0%

Output Voltage and Current overshoot

VIN=90Vac,LED load VIN=264Vac,LED load

CH1: VLED CH2: CH1: VLED CH2:

CH3: CH4: ILED CH3: CH4: ILED

3.2.4 Time Sequence

Turn-on delay measurement results Input voltage Turn-on delay

90V/60Hz 52.63mS

264V/50Hz 16.55mS

Turn-on delay

VIN=90Vac, LED load VIN=264Vac, LED load

CH1:Vled CH2: Vin CH1:Vled CH2: Vin

CH3: CH4: Iled CH3: CH4: Iled

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3.3 Waveform at normal/ start/output open/output short

3.3.1 MOSFET VDS and Secondary Rectifier VAK

Input VDS_max(V) VAK_max(V)

264Vac/50Hz @ Full load 591 95

264Vac/50Hz @ Start full load 591 95

264Vac/50Hz @ Output open 616 98

264Vac/50Hz @ Output short 529 83

Normal Startup

VIN=264Vac VIN=264Vac

CH1: VAK CH2: CH1: VAK CH2:

CH3: VDS CH4: CH3: VDS CH4:

Output Open Output Short

VIN=264Vac VIN=264Vac

CH1: VAK CH2: CH1: VAK CH2:

CH3: VDS CH4: CH3: VDS CH4:

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LD12V0.3A3652M.00

Disclaimer

On-Bright Electronics reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its documents, products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. This document is under copy right protection. None of any part of document could be reproduced, modified without prior written approval from On-Bright Electronics.

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confidential on-bright · 2018. 3. 21. · ©on-bright electronics confidential ob_doc_dbm_3652m00...

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