Secondary Side Controller, Synchronous Rectification, for High Efficiency SMPS

Favorite

Overview

The NCP4303A/B is a full featured controller and driver tailored to control synchronous rectifier circuitry in switch mode power supplies. Because of 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.

NCP4304 is recommended for new designs. NCP4303 will continue to be supported in production. NCP4304 was introduced to enhance the performance of LLC designs which use the Trigger input. Other performance and applications are the same.

  • ATX power supplies
  • High Power AC/DC adapters
  • Flat TV power supplies
  • All-in-one PCs
  • Gaming Consoles
  • Notebook Adapters
  • Automatic parasitic inductance compensation input
  • 40 ns turn off delay from current sense input to driver output
  • Wide Vcc operating range up to 30 V
  • Externally adjustable minimum on and minimum off times
  • Trigger input for interfacing with primary side switching signal
  • Disable input for standby mode
  • 5 A / 2.5 A peak sink / source drive capability
  • True secondary ZCD with adjustable threshold
  • Gate drive clamp of either 12 V (A version) or 6 V (B version)
  • Maximum frequency of operation up to 500 kHz

Search

Close Search

Products:

4

Expand Table

Collapse Table

Share

Export

Compare

Columns

0

Product Groups:

Orderable Parts:

4

Product

Status

ECAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

VCC Max (V)

Vref Typ (V)

ICC Max (A)

TA Min (°C)

TA Max (°C)

Pricing ($/Unit)

Loading...

NCP4303BMNTWG

Obsolete

Pb

A

H

P

DFN-8

1

260

REEL

4000

N

30

6

0.0093

-40

125

Price N/A

More Details

NCP4303AMNTWG

Obsolete

Pb

A

H

P

DFN-8

1

260

REEL

4000

N

30

12

0.0093

-40

125

Price N/A

More Details

NCP4303ADR2G

Active, Not Rec

Pb

A

H

P

SOIC-8

1

260

REEL

2500

N

30

12

0.0093

-40

125

$0.4267

More Details

NCP4303BDR2G

Obsolete

Pb

A

H

P

SOIC-8

1

260

REEL

2500

N

30

6

0.0093

-40

125

Price N/A

More Details

Show More

1-25 of 25

Products per page

Jump to :