SiFirst

SFL980

LED Driver

  • Built-in 700V startup device, startup time less than 100ms
  • 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
  • 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保护
  • Wide VDD operation range, convenient for LED design
  • Chip over temperature protection(OTP)
  • VDD UVLO and VDD voltage Clamper
  • Cycle-by-Cycle Current Limiting
  • 运用

    LED Lighting Application
        SFL980 integrates a 700V startup device, the IC can startup in 100ms, 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, SFL980 supports QR and DCM mode with input and output compensation increasing LED CC accuracy. Max frequency is clamped to 90KHz, resulting good EMI performance. SFL980 adopts QR control, turns GATE on at valley to decrease switch consumption, and the efficiency is increased. 
        SFL980 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.  
        SFL980 is available in SOP-8 packages.