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NCP4302: Synchronous Rectification Controller for Flyback SMPS

Datasheet: NCP4302 Secondary Side Synchronous Flyback Controller
Rev. 4 (184kB)
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Product Overview
产品说明
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.
特性   优势
     
  • 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
   
应用   终端产品
  • Notebook Adapters
  • LCD TV Adapters
  • Power Over Ethernet Applications (IP phones, Wireless Access Points)
 
  • Consumer Appliances such as DVD, VCR
  • Battery Chargers
技术文档及设计资源
参考设计 (1) 数据表 (1)
应用注释 (1) 封装图纸 (1)
供货情况和样品
产品
状况
Compliance
具体说明
封装
MSL*
容器
预算价格 (1千个数量的单价)
类型
外形
类型
数量
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
表面贴装器件的潮湿敏感度等级(MSL)(260°C回流温度时测量无铅,235°C回流温度时测量含铅)
市场订货至交货的时间(周) : 2 to 4
Mouser   (2015-07-09) : <1K
ON Semiconductor   (2015-07-08) : 27,500
市场订货至交货的时间(周) : 2 to 4
PandS   (2015-07-09) : >1K
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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