NCP81178: Secondary Synchronous Rectifier Driver for Forward Converters

Description: The NCP81178 is a secondary-side synchronous recti...
  • The NCP81178 is a secondary-side synchronous rectifier driver designed for isolated power converters, especially actively clamped forward or flyback, and asymmetric half bridge converters. The NCP81178 drives two N-channel MOSFETs on the secondary side in a complementary manner. It accepts a PWM signal that can be derived from the secondary winding or an auxiliary winding on the main power transformer. It can also take a PWM from the primary side controller through a pulse transformer or other isolator.
  • Features
  • N-channel synchronous rectifier MOSFET driver - Drives N-channel MOSFETs to improve efficiency for high power isolated solution
  • Primary shutdown detection - Protection against overvoltage
  • Internally generated PWM threshold voltage with external programmability - Design flexibility
  • 4.5A/3.8A sink and 3A source capability - Strong drivers allows fast turn on/off characteristics
  • 3mm by 3mm DFN package - Small size reduces board space
  • Applications
  • Isolated DC/DC power
  • servers silver box supplies
  • 48V server, telecom and datacom
  • End Products
  • servers
  • datacom
  • isolated bricks
  • Technical Documentation & Design Resources
    Availability and Samples
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Secondary Synchronous Rectifier Driver for Forward Converters, Secondary Synchronous Rectifier Driver for Forward Converter
  • Package Type: DFN-10
  • Package Case Outline: 506CL
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 3000
  • Inventory

  • Market Leadtime (weeks):8 to 12
  • Arrow:0
  • ON Semiconductor:3,000
  • Specifications
  • VCC Max (V): 14 
  • Vref Typ (V): 1.25 
  • ICC Max (A):  
  • TA Min (°C): -40 
  • TA Max (°C): 125 
  • Package Type: DFN-10 
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