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NCP4302: Synchronous Rectification Controller for Flyback SMPS

Datasheet: NCP4302 Secondary Side Synchronous Flyback Controller
Rev. 4 (184kB)
»View Reliability Data
»View Material Composition
»Product Change Notification (5)
Product Overview
Product Description
The NCP4302 is a full featured controller and driver that provides all the control and protection functions necessary for implementing a synchronous rectifier operation in a flyback converter. With the use of the NCP4302, the space conscious flyback applications such as Adaptors, chargers, set top boxes can achieve significant efficiency improvements at minimal extra cost. In addition to the synchronous rectifier control, the IC incorporates an accurate TL431 type shunt regulator, current monitoring circuit and optocoupler driver to provide a single IC secondary solution. The NCP4302 works with any type of flyback topology (continuous mode, Quasi resonant mode or discontinuous mode) providing a high level of versatility.
Features   Benefits
     
  • Self contained Control of Synchronous Rectifier in CCM, DCM, and QR Flyback Applications
 
  • Single IC secondary solution
  • Integrated controller and driver; wide operating voltage
 
  • Ease of implementation and simplified system design
  • Built-in voltage referfence (TL431 functionality)
 
  • Fewer components, reduced system cost
  • True Secondary Zero Current Detection
   
  • High Gate Drive Currents (2.5 A Source/Sink)
   
  • Current Sense Flexibility (MOSFET RDS(on) OR CS Resistor)
   
  • Accurate Low Voltage Reference, 1%
   
  • Programmable Independent Secondary Side ton and toff Delays
   
  • Maximum Frequency of Operation up to 250 kHz
   
Applications   End Products
  • Notebook Adapters
  • LCD TV Adapters
  • Power Over Ethernet Applications (IP phones, Wireless Access Points)
 
  • Consumer Appliances such as DVD, VCR
  • Battery Chargers
Technical Documentation & Design Resources
Reference Designs (1) Data Sheets (1)
Application Notes (1) Package Drawings (1)
Availability and Samples
Product
Status
Compliance
Description
Package
MSL*
Container
Budgetary Price/Unit
Type
Case Outline
Type
Qty.
NCP4302ADR2G Active, Not Rec 
Pb-free
Halide free
Synchronous Rectification Controller for Flyback SMPS SOIC-8 751-07 3 Tape and Reel 2500 $0.8266
NCP4302BDR2G Active, Not Rec 
Pb-free
Halide free
Synchronous Rectification Controller for Flyback SMPS SOIC-8 751-07 3 Tape and Reel 2500 $0.8266
Moisture Sensitivity level (MSL) for surface mount devices (lead free measured at 260°C reflow, non lead free at 235°C reflow)
Market Leadtime (weeks) : 2 to 4
Mouser   (2015-07-09) : <1K
ON Semiconductor   (2015-07-08) : 27,500
Market Leadtime (weeks) : 2 to 4
PandS   (2015-07-09) : >1K
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New Products
 

NCP4305  Secondary Side Synchronous Rectification Driver for High Efficiency SMPS Topologies

  • Precise true secondary zero current detection with adjustable threshold
  • Self synchronization
  • Typical 20 ns turn off delay from current sense input to driver