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SFA0006A is the current mode PWM control IC with a primary-side regulation suitable for the automotive system controllers. By employing the primary-side regulation, the IC realizes low component counts and the downsizing the power supply circuit. For supporting the low consumption power and the low standby power, the IC has an automatic standby function. The IC automatically switches to the PWM mode in normal operation, and to the burst oscillation mode at standby. The IC achieves power supply systems to be more cost effective with fewer external components.

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    • AEC-Q100 Qualified
    • Bare Lead Frame: Pb-free (RoHS Compliant)
    • Primary-side Regulation
      Optocoupler is Unnecessary
      Output Voltage is Set by External Resistor and Transformer Winding Ratio
    • Current Mode PWM Control
    • Constant Voltage (CV) and Constant Current (CC) Controls
    • Automatic Standby Function
    • Operation Modes:Normal Operation: PWM Mode
      Light Load Operation: Green Mode
      Standby Operation: Burst Oscillation Mode
    • Enable Function
      (IC Operation Stops when the EN Pin is Low Level)
    • Random Switching Function
    • Slope Compensation Function
      (Subharmonic Oscillation Prevention)
    • Protections:
      Overcurrent Protection (OCP): Pulse-by-Pulse
      Overload Protection (OLP) with Timer: Auto-restart
      Overvoltage Protection (OVP): Auto-restart
      Thermal Shutdown (TSD): Auto-restart


    For following automotive switching power supply circuits connected to 12 V or 24 V battery:
    • Auxiliary Power Supply
    • Buck Converter Circuit


Control Method PWM
Type Controller
Output Current W
RDS(ON) (max.) Ω
VDSS (min.) V
VCC (max.) 40 V
Oscillating Frequency 20 to 60 kHz
OLP Auto Restart
TSD Auto Restart


Control IC (External MOS)

Block Diagram

Block Diagram

Pin Configuration Definitions

Pin Configuration Definitions

Physical Dimensions

Physical Dimensions

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