IR1167(A,B)S

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www.irf.com

© 2013 International Rectifier

Nov 6, 2013

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 transition. 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.