NCP81178 Datasheet - ON Semiconductor

NCP81178 Secondary Synchronous Rectifier Driver

Pin No. Pin Name Description 1 SDDET Primary shutdown detection. When the voltage on this pin exceeds the shutdown threshold, the driver shuts down. If valid PWM pulses resume and VCC is above UVLO threshold, the driver will go through a restart process. 2 RRAMP Ramp slope setting for the.

NCP81178 Secondary Synchronous Rectifier Driver for Forward Converters The NCP81178 is a secondary side synchronous rectifier driver designed for isolated power converters, especially actively clamped forward and fly back, and asymmetric half bridge converters. The NCP81178 drives two N channel MOSFETs on the secondary side in a complementary manner. It accepts a PWM input signal derived from the secondary winding or an auxiliary winding on the main power transfor.

NCP81178 Features

* N

* Channel Synchronous Rectifier MOSFET Driver

* PWM Input Derived from a Winding on the Main Transformer or Directly from a Pulse Transformer

* Internally Generated PWM Threshold Voltage that can be Programmed Externally

* Pre

* bias Startup Capability

NCP81178 Datasheet (198.00 KB)