Fairchild RD-LL025 Data Handbook
Summary
Optimize your LED SMPS design using this comprehensive reference design guide for the FL7732 controller. This manual provides schematics, component lists, and detailed performance data demonstrating high efficiency (up to 87.6%), Power Factor Correction (>0.90), and robust regulation across wide input voltages (90-265V AC). Ideal for engineers building cost-effective, reliable LED lighting or power supplies that require stable constant-current output and integrated protection features.
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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 8.4W 24V(0.35A)
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): <±2.1% Constant Current Regulation vs. Line Voltage Change (90~265VAC): <±3.5% Output-Open & Short-Circuit Protection with Auto restart System Efficiency up to 87.6% PF and THD at Nominal Voltages (90 ~ 265VAC): PF (>0.90), THD (<25%)
© 2011 Fairchild Semiconductor Corporation 1 RD-L025_FL7732 • Rev.1.0.0
Page Summary Contents For Fairchild RD-LL025 Data Handbook
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 7 |
| File Size | 497.88 KB |
| Published | July 16, 2026 |
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Frequently Asked Questions
What is the input voltage range for the FL7732?
The input voltage range is 90–265V AC.
Does the FL7732 require a bulk capacitor or feedback circuitry?
No, it is a cost-effective solution as it requires no Input Bulk Capacitor or Feedback Circuitry.
What is the maximum system efficiency reported?
The reported system efficiency can reach up to 87.6%.
How well does constant current regulation perform at varying input voltages?
It maintains less than ±2.1% change versus output voltage changes (11–28V), and <±3.5% versus line voltage changes.