Fairchild RD-026 Data Handbook
Summary
Designed for enhancing LED SMPS operation, this guide centers on the FL7732 PWM controller, offering a cost-effective solution for high-efficiency constant current drivers. The manual provides a complete reference design package, including detailed schematics, component lists, and performance verification graphs. It demonstrates excellent Power Factor Correction (PFC >0.9) and stable regulation across wide AC ranges (90–265V). This technical resource is ideal for electrical engineers developing reliable, compact, and high-performance LED lighting solutions.
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Fairchild Reference Design
The following user guide supports the reference design for the FL7732. It should be used in conjunction with the FL7732 datasheet as well as Fairchild’s application notes and technical support team. Please visit Fairchild’s website at www.fairchildsemi.com.
Output Output Voltage
Application Fairchild Device Input Voltage Range
Power (Rated Current)
LED SMPS FL7732 90-265VAC 16.8W 24V(0.7A)
Key Features Cost-Effective Solution: No Input Bulk Capacitor or Feedback Circuitry Power Factor Correction (PFC) Accurate Constant-Current (CC) Control Linear Frequency Control Improves Efficiency and Simplifies Design Constant Current Regulation vs. Output Voltage Change (11~28V): <±2.38% Constant Current Regulation vs. line voltage change (90~265VAC): <±2.79% Output-Open & Short-Circuit Protection with Auto Restart System Efficiency Up to 89% PF and THD at Nominal Voltages (90 ~ 265VAC): PF (>0.90), THD (<20%)
© 2011 Fairchild Semiconductor Corporation 1 RD-L026_FL7732 • Rev. 1.0.0
Page Summary Contents For Fairchild RD-026 Data Handbook
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 7 |
| File Size | 302.88 KB |
| Published | June 22, 2026 |
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Frequently Asked Questions
What are the operational specifications of the FL7732 power supply?
It handles an AC input voltage range from 90V to 265V.
Does this design require a bulk capacitor or feedback circuitry for cost-effectiveness?
No, it is designed as a cost-effective solution that requires neither input bulk capacitors nor external feedback circuitry.
What types of primary protections are included in the unit?
The device includes Output-Open and Short-Circuit Protection, which feature Auto Restart capability.
What are the reported Power Factor (PF) and Total Harmonic Distortion (THD) ratings?
At nominal voltages (90~265V), it achieves a PF greater than 0.90 and THD less than 20%.