*Please note that this data sheet contains advanced information that could change before the product is released to production.

Features

IR1167ASPbF

IR1167BSPbF

www.irf.com

1

IR1167 Application Diagram

Data Sheet PD60254A

Description

IR1167S is a smart secondary side driver IC designed to drive N-Channel power MOSFETs

used as synchronous rectifiers in isolated Flyback converters.

The IC can control one or more paralleled N-MOSFETs to emulate the behavior of Schottky

diode rectifiers. The drain to source voltage is sensed differentially to determine the polarity

of the current and turn the power switch on and off in proximity of the zero current transi-

tion.

Ruggedness and noise immunity are accomplished using an advanced blanking scheme

and double-pulse suppression which allow reliable operation in continuous, discontinuous

and critical current mode operation and both fixed and variable frequency modes.

Package

8-Lead SOIC

RMOT

Cdc

Rg

VD

5

VS

6

MOT

3

OVT

2

EN

4

GND

7

VGATE

8

VCC

1

U1

IR1167S

Q1

XFM

Co

Rdc

Vin

Rtn

Ci

Rs

Cs

PRELIMINARY