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NCP81178 - Secondary Synchronous Rectifier Driver

Description

Pin No.

Primary shutdown detection.

shuts down.

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.
  • Primary Shutdown Detection.
  • Frequency Detection Window.
  • Wide VIN/VCC Range: 4.5 V to 14 V.
  • 6 V/150 mA LDO for VCC Supply.
  • 4.5 A/3.8 A Sink and 3 A Source.

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Datasheet Details

Part number NCP81178
Manufacturer onsemi
File Size 198.00 KB
Description Secondary Synchronous Rectifier Driver
Datasheet download datasheet NCP81178 Datasheet

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Full PDF Text Transcription

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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 transformer. It can also take a PWM signal from the primary−side controller through a pulse transformer or other isolators.
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