NCP81178 Datasheet (ON Semiconductor) - Secondary Synchronous Rectifier Driver

NCP81178 Description

Pin No.

Pin Name Description 1 SDDET Primary shutdown detectionWhen the voltage on this pin exceeds the shutdown threshold, the driver shuts downIf 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 convertersThe NCP81178 drives two N *channel MOSFETs on the secondary side in a complementary mannerIt accepts a PWM input signal derived from the secondary winding or an auxiliary winding on the main power transfor

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 - ON Semiconductor

NCP81178, Secondary Synchronous Rectifier Driver