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Fairchild RD-009 - FL6961 MOSFET Data Handbook

Summary

This Fairchild reference design supports FL6961 for efficient AC LED illumination applications. Designed for 90-265V input and 24V output, it features boundary mode PFC, low THD, and programmable maximum on-time. Ideal for engineers developing power supplies using this controller.

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Fairchild Reference Design

The following reference design supports inclusion of FL6961 in design of LED illumination. It should be used in conjunction with the FL6961 datasheet as well as Fairchild’s application notes and technical support team. Please visit Fairchild’s website at http://www.fairchildsemi.com.

Input Voltage Rated Output Output Voltage

Application Fairchild Device

Range Power (Rated Current)

LED Illumination FL6961 90-265VAC 16.8W 24V (0.7A)

Key Features  Boundary Mode PFC Controller  Low Input Current THD  Controlled On-time PWM  Zero Current Detection  Cycle-by-cycle Current Limiting  Leading-edge blanking instead of RC filtering  Low Start-up Current: 10u A (typical)  Low Operating Current: 4.5m A (typical)  Feedback Open-Loop Protection  Programmable Maximum On-Time (MOT)  Output Over-Voltage Clamping Protection  Clamped Gate Output Voltage 16.5V

© 2011 Fairchild Semiconductor Corporation 1 RD-L009_FL6961 • Rev. 1.0.1

Page Summary Contents For Fairchild RD-009 - FL6961 MOSFET Data Handbook

Page 1 www.fairchildsemi.com Fairchild Reference Design The following reference design supports inclusion of FL6961 in design of LED illumination. It should be used in conjunction with the FL6961 datasheet a...
Page 2 www.fairchildsemi.com 1. Schematics fo r O -a , R ,R in rie FL6961 tro l P rt tro l P rt Figure 1. Schematic © 2011 Fairchild Semiconductor Corporation 2 RD-L009_FL6961 • Rev. 1.0.1
Page 3 www.fairchildsemi.com 2. Transformer 2.1. Transformer Schematic Diagram 6mm 6mm 3mm 3mm 1/2Np 0.33φ * 1 40T Tape 3T 1/2Np Naux 0.33φ * 1 Tape 2T 40T 1/2Np Tape 3T Naux Ns 0.33φ * 1 10T Tape 3T 1/2Np P...
Page 4 www.fairchildsemi.com 2.2. Performance Figure 3. Efficiency Curve Figure 4. Power Factor Performance © 2011 Fairchild Semiconductor Corporation 4 RD-L009_FL6961 • Rev. 1.0.1
Page 5 www.fairchildsemi.com Figure 5. CC/CV Curve 3. Related Resources Datasheet link FL6961 http://www.fairchildsemi.com/referencedesign/ © 2011 Fairchild Semiconductor Corporation 5 RD-L009_FL6961 • Rev. ...
Page 6 www.fairchildsemi.com Reference Design Disclaimer Fairchild Semiconductor Corporation (“Fairchild”) provides these reference design services as a benefit to our customers. Fairchild has made a good fa...

Manual Details

Brand Fairchild
Pages 6
File Size 256.04 KB
Published June 16, 2026
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Frequently Asked Questions

What input voltage range does the FL6961 reference design support?

It supports an input voltage range of 90-265V AC.

What is the rated output power and current of this LED driver design?

The rated output is 16.8W at 24V and 0.7A.

How can I get the full datasheet and application notes for the FL6961?

Visit Fairchild Semiconductor's website at www.fairchildsemi.com for the datasheet and related resources.