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Secondary Side Controllers | NCP4304

Secondary Side Controller, Synchronous Rectification, for High Efficiency SMPS Topologies

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Overview

The NCP4304A/B is a full featured controller and driver tailored to control synchronous rectification circuitry in switch mode power supplies. Due to its versatility, it can be used in various topologies such as flyback, forward and Half Bridge Resonant LLC. The combination of externally adjustable minimum on and off times helps to fight the ringing induced by the PCB layout and other parasitic elements. Therefore, a reliable and noise less operation of the SR system is insured. The extremely low turn off delay time, high sink current capability of the driver and automatic package parasitic inductance compensation system allow to maximize synchronous rectification MOSFET conduction time that enables further increase of SMPS efficiency. Finally, a wide operating VCC range combined with two versions of driver voltage clamp eases implementation of the SR system in 24 V output applications.

  • High Power Density AC/DC Power Supplies
  • Notebook Adapters
  • Server Power Supplies
  • ATX Power Supplies
  • Precise True Secondary Zero Current Detection with Adjustable Threshold
  • Automatic Parasitic Inductance Compensation
  • Typically 40 ns Turn off Delay from Current Sense Input to Driver
  • Zero Current Detection Pin Capability up to 200 V
  • Optional Ultrafast Trigger Input
  • Disable Input
  • Adjustable Minimum ON Time and Minimum OFF Time
  • 5 A/2.5 A Peak Current Sink/Source Drive Capability
  • Operating Voltage Range up to 30V

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Reference Price

NCP4304ADR2G

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Active

CAD Model

Pb

A

H

P

SOIC-8

751-07

1

260

REEL

2500

Y

30

N/A

0.0066

-40

125

$0.4782

More Details

NCP4304AMNTWG

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Active

CAD Model

Pb

A

H

P

DFN-8

488AF

1

260

REEL

4000

N

30

N/A

0.0066

-40

125

$0.741

More Details

NCP4304BDR2G

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Active

CAD Model

Pb

A

H

P

SOIC-8

751-07

1

260

REEL

2500

Y

30

N/A

0.0062

-40

125

$0.6207

More Details

NCP4304BMNTWG

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Obsolete

CAD Model

Pb

A

H

P

DFN-8

488AF

1

260

REEL

4000

N

30

N/A

0.0062

-40

125

Price N/A

More Details

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