SiFirst

SFL678

LED Driver

  • Wide VDD Range (10 to 30V)Eases Flexible LED System Design
  • Precision LED Output voltage clamp
  • Primary Side regulation (PSR) Control ,No Secondary Feedback Circuit Required
  • 1% Precision (@Tj=25)Internal Reference Voltage for Constant Current(CC) Control
  • Support Analog/PWM Dimming
  • Proprietary "Extended Synchronous Dimming " to Achieve Larger than 1000:1 Dimming Range
  • Built-in 600V Power MOSFET
  • LED Open/Short Circuit Protection
  • PFM Control Ease EMI Design
  • Built-in leading edge blanking (LEB)
  • 运用

    Dimming LED Luminaries
        SFL678 is a high precision AC/DC offline PSR (Primary Side Regulation) controller for LED luminaries. The IC can provide very tight (less than 3%) constant current control (CC) ideal for LED lighting applications. 
        SFL678 uses Pulse Frequency Modulation (PFM) control to improve efficiency and eases system EMI design. The IC dramatically lower system cost by eliminating secondary feedback circuits.The wide VDD operating range (10V to 30V, typical) of SFL678 can ease flexible LED system design. The IC also has built-in soft start function to soften the stress on the MOFET during power on period. 
        SFL678 integrates functions and protections of Under Voltage Lockout (UVLO), VDD Over Voltage Protection (VDD OVP), LED Open/Short circuit protection,Soft start Control, cycle-by-cycle Current Limiting (OCP), pins Floating Protection, Gate Clamping, VDD Clamping. 
        SFL678 is available in SOT23-6 packages.