SiFirst

SFL950

LED Driver

  • Proprietary "super-PFC/PSRTM" control, realize PF>0.92
  • Adopt "min-THDTM" technology, THD<10%
  • Quasi resonant control, efficiency up to 90%
  • Built-in closed-loop control, support QR and DCM mode
  • 1.5% accuracy reference for CC
  • Primary side regulation(PSR), without optocoupler and TL431
  • Max 90KHz frequency clamping for EMI performance
  • Realize ±4% CC accuracy for mass production
  • Built-in AC Line Compensation for High Precision LED Output Current
  • LED short/open protection
  • Ultra-low startup current, pins floating protection
  • Wide VDD operation range, convenient for LED design
  • Chip over temperature protection(OTP)
  • 运用

    LED Lighting Application
        SFL950 is optimized for isolated Flyback topology LED constant current (CC) controller, with high PF value and low THD, is suitable for LED lighting area. The IC adopts proprietary "super-PFC/PSRTM" control and "min-THDTM" technology, makes efficiency up to 90%, PF value larger than 0.92, THD lower than 10% and ±4% CC accuracy for mass production.  
        Built-in proprietary high precision closed-loop constant current control, SFL950 supports QR and DCM mode with input and output compensation increasing LED CC accuracy. Max frequency is clamped to 90KHz, resulting good EMI performance. SFL950 adopts QR control, turns GATE on at valley to decrease switch consumption, and the efficiency is increased. 
        SFL950 integrates functions and protections of Under Voltage Lockout (UVLO), LED Open/Short Protection, VCC Over Voltage Protection (OVP), Load Over Voltage Protection (Load OVP), Soft Start, Cycle-by-cycle Current Limiting (OCP), Burst Mode Control @ Light Loading, GD Clamping, VCC Clamping, etc. 
        SFL950 is available in SOT23-6 packages