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Secondary Side Controllers | NCP4302

Synchronous Rectification Controller for Flyback SMPS

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Overview

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.

  • Notebook Adapters
  • LCD TV Adapters
  • Power Over Ethernet Applications (IP phones, Wireless Access Points)
  • Consumer Appliances such as DVD, VCR
  • Battery Chargers
  • Self contained Control of Synchronous Rectifier in CCM, DCM, and QR Flyback Applications
  • Integrated controller and driver; wide operating voltage
  • True Secondary Zero Current Detection
  • High Gate Drive Currents (2.5 A Source/Sink)
  • Built-in voltage referfence (TL431 functionality)
  • 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

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NCP4302ADR2G

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Obsolete

CAD Model

Pb

A

H

P

SOIC-8

751-07

3

260

REEL

2500

N

28

2.55

0.1

0

85

Price N/A

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NCP4302BDR2G

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CAD Model

Pb

A

H

P

SOIC-8

751-07

3

260

REEL

2500

N

28

1.275

0.1

0

85

Price N/A

More Details

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