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Home » NEWEST Products » New by Category » Semiconductors » Driver ICs » FL7733 PSR LED Driver - Fairchild
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Fairchild FL7733 Primary-Side-Regulated LED Driver

Fairchild FL7733 Primary-Side-Regulated LED Driver

Fairchild's FL7733 Primary-Side-Regulated LED Driver is a highly integrated PWM controller with advanced Primary-Side Regulation (PSR) technique that provides features to enhance the performance of low-to-mid-power LED lighting converters. The FL7733 LED driver is designed with minimum system components while LED current is accurately controlled by Fairchild's TRUECURRENT® technique and improved feedback loop control. Constant Current (CC) tolerance less that +/-1% over the universal line voltage range meets the requirement of highly reliable LED brightness management. The FL7733 provides powerful protections, such as LED short/open, output diode short, sensing resistor short / open, and over-temperature for high system reliability.

  • Cost-Effective Solution without Requiring Input Bulk Capacitor and Secondary Feedback Circuitry
  • Power Factor Correction
  • THD <10% Over Universal Line Range
  • Constant Current Tolerance:
    • <+/-1% Over Universal Line Voltage Variation
    • <+/-1% by 50%-100% Load Voltage Variation
    • <+/-1% by +/-20% Magnetizing Inductance Variation
  • High-Voltage Startup with VDD Regulation
  • Adaptive Feedback Loop Control for Startup without Overshoot
  • LED Short / Open Protection
  • Output Diode Short Protection

  • Sensing Resistor Short / Open Protection
  • VDD Over-Voltage Protection (OVP)
  • VDD Under-Voltage Lockout (UVLO)
  • Over-Temperature Protection (OTP)
  • All Protections are Auto Restart (AR)
  • Cycle-by-Cycle Current Limit
  • Application Input Voltage Range: 80VAC - 308VAC

  • LED Lighting System

Block Diagram
Block Diagram
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  • Fairchild Semiconductor