FAIRCHILD User Guide for FEBL010 Evaluation Board
Summary
Prototype high-efficiency LED ballast drivers with this evaluation board, built around the FL6961 Active Power Factor Correction (PFC) controller. This comprehensive user guide is designed for electrical engineers and power supply developers, providing everything needed for implementation. The manual covers general specifications, circuit schematics, bill of materials, and detailed performance testing—including input voltage range compatibility, efficiency, Power Factor Correction, and THD analysis. Use this kit to build reliable, universal constant-current DC power solutions (90V–265V input).
Page 1 Text Content
User Guide for
FEBL010 Evaluation Board
Universal LED Driver using the FL6961
CRM PFC Controller
Featured Fairchild Product:
FL6961
Direct questions or comments about this evaluation board to: “Worldwide Direct Support”
Fairchild Semiconductor.com
© 2012 Fairchild Semiconductor Corporation 1 FEB-L010_FL6961 • Rev. 1.0.0
Page Summary Contents For FAIRCHILD User Guide for FEBL010 Evaluation Board
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User Guide for FEBL010 Evaluation Board Universal LED Driver using the FL6961 CRM PFC Controller Featured Fairchild Product: FL6961 Direct questions or comments about this evaluation board to: “Worldw...
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Table of Contents 1. Introduction ............................................................................................................................... 3 1.1. General Description of FL6961 ....
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This user guide supports the evaluation kit for the FL6961. It should be used in conjunction with the FL6961 datasheet as well as Fairchild’s application notes and technical support team. Please visit...
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1.3. Block Diagram Figure 1. Internal Block Diagram of FL6961 © 2012 Fairchild Semiconductor Corporation 4 FEB-L010_FL6961 • Rev. 1.0.0
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2. General Specifications for Evaluation Board All data of the evaluation board was measured with the board enclosed in a case and external temperature of around 25°C. Table 1. Summary of Features and...
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2.1 Photographs of the Evaluation Board Figure 2. Photograph (125mm (W) x 41mm (H)) Top View Figure 3. Photograph (125mm (W) x 41mm (H)) Bottom View © 2012 Fairchild Semiconductor Corporation 6 FEB-L0...
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2.2 Printed Circuit Board Figure 4. Printed PCB, Top Side Figure 5. Printed PCB, Bottom Side © 2012 Fairchild Semiconductor Corporation 7 FEB-L010_FL6961 • Rev. 1.0.0
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2.3 Schematic of the Evaluation Board Figure 6. Schematic of Evaluation © 2012 Fairchild Semiconductor Corporation 8 FEB-L010_FL6961 • Rev. 1.0.0
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2.4 Bill of Materials Table 2. Bill of Materials of Evaluation Board Item Part Reference Value Qty Description (Manufacturer) No. CRM PFC Controller 1 U101 FL6961 1 (Fairchild Product) 1000V/1A Ultra-...
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Bill of Materials (Continued) Part Reference Value Qty Description (Manufacturer) No. 29 LF101, LF102 40m H 2 Line Filter 30 L201 10µH 1 Stick Inductor 31 T2 EER2828 1 Transformer, 700µH, 1k Hz, 1V 32...
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2.5 Connections Transformer and Winding Specifications Figure 7. Transformer Specifications & Construction [EER2828] Table 3. Winding Specifications No Winding Pin (S F) Wire Turns Winding Metho...
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3 Performance of Evaluation Board 3.1 Test Condition & Items Table 5. Test Condition & Test Equipment Ambient Temperature TA = 25°C AC Power Source: PCR500L by Kikusui Power Analyzer: 2574R se...
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3.2 Electrical Efficiency Figure 8 shows at least 84% system efficiency with universal input condition at the rated output load. ff ic ie cy Input Voltage [VAC] Figure 8. System Efficiency Input Volta...
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3.3 Power Factor Figure 9 shows over 90% PF results with universal input condition at rated output power. er ac to Input Voltage [VAC] Figure 9. Power Factor Input Voltage 90VAC 115VAC 230VAC 265VAC P...
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3.4 Constant Current & Constant Voltage (CC/CV) Figure 10 shows the typical CC/CV performance on the board, showing very stable CC performance at 90VAC ~ 265VAC input conditions. tp lt ag e[ Input...
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Table 6. CC and CV Measured Data 90VAC 115VAC 220VAC 265VAC Vout Iout Vout Iout Vout Iout Vout Iout 23.50 0.0000 23.50 0.0000 23.50 0.0000 23.50 0.0000 23.75 0.2440 23.75 0.2440 23.75 0.2440 23.74 0.2...
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3.5 THD Performance Figure 11 through Figure 14 show the test results of the FL6961 evalutaiton board. All of the results meet international regulations. am en ta am en ta 90Vac(IEC) 90Vac(Test) Harmo...
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230Vac(IEC) 230Vac(Test) am en ta am en ta Harmonic Number Figure 13. THD Performance Results at 230VAC 265Vac(IEC) 265Vac(Test) Harmonic Number Figure 14. THD Performance Results at 265VAC © 2012 Fai...
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3.6 Temperature Checking Results Figure 15 through Figure 18 show the temperature-checking results on the board in minimum and maximum input voltage condition. 90VAC / 60Hz 265VAC / 60Hz Remark Bridge...
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3.7 Startup Time Figure 19 and Figure 20 show the typical startup performance of the board. A longer startup time to release the UVLO function can be achieved at 90VAC condition rather than 265VAC con...
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Figure 21 through Figure 24 show the typical startup performance of the Flyback circuit on the board. Input Voltage Turn-On Time Remark 90VAC / 60Hz 0.922s 115VAC / 60Hz 0.669s 230VAC / 60Hz 0.309s 26...
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3.8 Operation Waveforms Figure 25 through Figure 28 show the normal operation waveforms on the board at different input voltage conditions. The output voltage maintains the output level with 120Hz rip...
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Figure 29 through Figure 32 show the input current waveforms on the board at different input voltage conditions. Figure 29. 90VAC / 60Hz, CH3 (Blue): VIN, Figure 30. 115VAC / 60Hz, CH3 (Blue): VIN, CH...
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3.9 Short-Circuit Protection Figure 33 through Figure 36 show the typical output waveforms at short load condition. The IC repeats ON and OFF functions in this mode. Figure 33. 90VAC / 60Hz, CH3 (Blue...
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3.10 Stress of the MOSFET & Rectifier Figure 37 through Figure 40 show the voltage stress on the MOSFET at startup with the rated load condition. 90VAC / 60Hz 115VAC / 60Hz 230VAC / 60Hz 265VAC / ...
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Figure 41 through Figure 44 show the current stress on the MOSFET at startup with the rated load condition. Figure 41. 90VAC / 60Hz, CH3 (Blue): VDS, Figure 42. 115VAC / 60Hz, CH3 (Blue): VDS, CH4 (Gr...
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Figure 45 through Figure 48 show the voltage stress on the output rectifier at startup with the rated load condition. Figure 45. 90VAC / 60Hz, CH3 (Blue): VAK, Figure 46. 115VAC / 60Hz, CH3 (Blue): VA...
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Figure 49 throgh Figure 52 show the current stress on the output rectifier at startup with the rated load condition. Figure 49. 90VAC / 60Hz, CH3 (Blue): VAK, Figure 50. 115VAC / 60Hz, CH3 (Blue): VAK...
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3.11 Stress of the MOSFET & Rectifier All measurements were conducted in observance of CISPR22 criteria. Figure 53. EMI Results, Conducted Emission-Line at 230VAC, Full Load (24V/1.25A; 6 Series, ...
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4. Revision History Rev. Date Description 1.0.0 5/22/12 Initial Release WARNING AND DISCLAIMER Replace components on the Evaluation Board only with those parts shown on the parts list (or Bill of Mate...
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 30 |
| File Size | 4.04 MB |
| Published | July 10, 2026 |
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Frequently Asked Questions
What is the input voltage range for this ballast solution?
The input voltage range is 90V – 265V.
What type of PFC controller uses the FL6961?
It is a boost PFC controller that operates in Critical conduction Mode (CRM).
How does the FL6961 manage control power loss compared to current-mode controllers?
Because it compares an internal ramp signal with the error amplifier output, it does not need rectified AC line voltage information, saving input voltage sensing power loss.
What are the typical operating currents for the FL6961?
The typical low startup current is 10µA, and the typical low operating current is 4.5mA.