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Fairchild FEBFL7701_L31H008A User Manual

7.8 w led ballast using fl7701
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User Guide for
FEBFL7701_L31H008A
7.8 W LED Ballast Using FL7701
Featured Fairchild Product:
FL7701
Direct questions or comments
about this evaluation board to:
"Worldwide Direct Support"
Fairchild Semiconductor.com
© 2012 Fairchild Semiconductor Corporation
1
FEBFL7701_L31H008A • Rev.1.0.2

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Summary of Contents for Fairchild FEBFL7701_L31H008A

  • Page 1 User Guide for FEBFL7701_L31H008A 7.8 W LED Ballast Using FL7701 Featured Fairchild Product: FL7701 Direct questions or comments about this evaluation board to: “Worldwide Direct Support” Fairchild Semiconductor.com © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 2: Table Of Contents

    System Efficiency ......................18 8.7. Power Factor at Rated Load Condition ................ 19 8.8. THD Performance ......................20 8.9. Thermal Performance ....................21 8.10. EMI Test Results ......................23 9. Revision History ........................24 © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 3: Introduction

    This user guide supports the evaluation kit for the FL7701. It should be used in conjunction with the FL7701 datasheet as well as Fairchild’s application notes and technical support team. Please visit Fairchild’s website at www.fairchildsemi.com. Introduction This document describes the proposed solution for an universal input, 2.4W LED ballast using the FL7701.
  • Page 4 If ADIM is not used, connect a 0.1 µF bypass capacitor between ADIM and GND. GROUND. Ground for the IC. No Connection. High Voltage. Connects to the high-voltage line and supplies current to the IC. © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 5: General Specifications For Evaluation Board

    LED condition or use a Zener diode for protection. 2. The output power is not equal to the apparent power due to the slight phase shift between the output voltage and current. © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 6: Photographs Of The Evaluation Board

    Top-View (PCB) (28 mmx52 mmx18 mm) Figure 3. Top View (28 mm x 52 mm x 18 mm) (Mounted Housing) Figure 4. Side View (28 mm x 52 mm x 18 mm) © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 7: Printed Circuit Board

    Printed Circuit Board Figure 5. Top Side Figure 6. Bottom Side © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 8: Schematic

    D1 ES3J Fuse 5.5mH 1A/250V 1N4148 47nF/630V R2 56k 33nF/630V FQN1N60C R3 510R ADIM 560R C4 1µF R6 OPEN C3 100pF R5 2.4R R4 2.4R L2 10mH Figure 7. Schematic of Evaluation Board © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 9: Bill Of Materials

    560 Ω, SMD Resistor 3216 Yageo RSMF1JB56K0 56k Ω / 1 W Metal Resistor Stackpole Elec. RC0805JR-07511RL 510 Ω, SMD Resistor 2012 Yageo R4, R5 RC1206JR-072R4RL 2.4 Ω, SMD Resistor 3216 Yageo Open © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 10: Inductor Design

    Figure 8. Transformer Structure Table 3. Inductor Specification Pin (S  F) Winding Wire Turns Winding Method 1  6 0.2Ø 280Ts Solenoid Winding Insulation: Polyester Tape t = 0.025 mm 3-Layer © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 11: Performance Of Evaluation Board

    Oscilloscope: waverunner 64Xi by Lecroy EMI Test Receiver: ESCS30 by ROHDE & SCHWARZ Test Equipment Two-Line V-Network: ENV216 by ROHDE & SCHWARZ Thermometer: CAM SC640 by FLIR SYSTEMS LED: EHP-AX08EL/GT01H-P03 (3W) by Everlight © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 12: Typical Waveforms: Startup

    CH1: V CH2: V CH3: V CH4: I CH1: V CH2: V CH3: V CH4: I DRAIN DRAIN Figure 11. Soft-Start, DC Mode, 150 V Figure 12. Soft-Start, DC Mode, 200 V © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 13: Operating Frequency & Minimum Duty

    400 ns minimum on-time. CH1: V CH2: V CH3: V CH4: I DRAIN Minimum On Time: 1.91µs Switching Frequency: 44.64kHz Figure 13. Operating Frequency & Minimum Duty © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 14: Typical Waveforms: Steady State

    H1: V CH2: V CH3: V CH4: I DRAIN DRAIN Figure 16. Input Voltage: 220 V , Input Frequency: Figure 17. Input Voltage: 220 V , Input Frequency: 47 Hz 64 Hz © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...
  • Page 15 LED(RMS) LED(RMS) LED(RMS) 31.46 V 250.1 mA 31.42 V 250.1 mA 187 V 31.48V 250.5 mA 31.47 V 250.4 mA 220 V 31.49 V 251.1 mA 31.49 V 251.2 mA 264 V © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 16: Typical Waveforms: Abnormal Mode (Led Open)

    C4 1uF R6 OPEN C3 100pF R5 2.4R R4 2.4R L2 10mH Figure 20. Open-Load Condition Test CH1: V CH2: V CH3: V CH4: I DRAIN Figure 21. Test Results of Open-Load Condition © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 17: Typical Waveforms: Abnormal Mode (Inductor Short)

    FL7701 uses an abnormal over-current protection (AOCP) function, limiting the current on RCS in the event of an inductor short. Figure 22. Inductor-Short Condition CH1: V CH2: V CH3: V CH4: I DRAIN Figure 23. Test Results of Inductor-Short Condition © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 18: System Efficiency

    System Efficiency Table 6. Test Results Input Voltage Efficiency 47 Hz 85.80 187 V 64 Hz 85.85 47 Hz 85.60 220 V 64 Hz 85.44 47 Hz 85.00 264 V 64 Hz 84.80 © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 19: Power Factor At Rated Load Condition

    Table 7. Test Results Input Voltage Power Factor 47 Hz 95.37 187 V 64 Hz 95.59 47 Hz 95.28 220 V 64 Hz 94.98 47 Hz 94.31 264 V 64 Hz 93.91 © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 20: Thd Performance

    Total Harmonic Discharge Performance Table 8. Test Results Input Voltage 47 Hz 27.18 187 V 64 Hz 27.94 47 Hz 27.72 220 V 64 Hz 28.72 47 Hz 29.10 264 V 64 Hz 29.40 © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 21: Thermal Performance

    Inductor TEMP: 67.6℃ 61.1℃ TEMP: 49.9℃ HV Resistor(R2) TEMP: Diode (D1) TEMP: 62.3℃ 64.2℃ Figure 29. Bottom-Side Temperature at 220 V Figure 30. Top-Side Temperature at 220 V Condition Condition (IC) (Inductor) © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...
  • Page 22 Table 9. Temperature Performance by Input Voltage MOSFET Diode Inductor HV Resistor 187 V 56.0°C 63.6°C 61.1°C 48.2°C 60.6°C 220 V 66.5°C 55.0°C 64.2°C 54.6°C 62.3°C 264 V 71.5°C 59.5°C 65.0°C 57.7°C 66.0°C © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 23: Emi Test Results

    CISPR15 for lighting applications. Figure 33. Conducted Emission-Line at 220 V Input Condition, Full Load (10-LED Series) Figure 34. Conducted Emission-Neutral at 220 V Input Condition, Full Load (10-LED Series) © 2012 Fairchild Semiconductor Corporation FEBFL7701_L31H008A • Rev.1.0.2...

  • Page 24: Revision History

    Fairchild warrantees that its products meet Fairchild’s published specifications, but does not guarantee that its products work in any specific application. Fairchild reserves the right to make changes without notice to any products described herein to improve reliability, function, or design.

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