IR11672AS

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Description

IR11672A is a smart secondary-side driver IC designed to drive N-Channel power MOSFETs used as

synchronous rectifiers in isolated Flyback and resonant half-bridge 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. The cycle-by-cycle MOT protection circuit can automatically detect no load

condition and turn off gate driver output to avoid negative current flowing through the MOSFETs. Ruggedness

and noise immunity are accomplished using an advanced blanking scheme and double-pulse suppression

which allow reliable operation in all operating modes.