IR11682S
Description
IR11682 is a dual smart secondary-side rectifier driver IC designed to drive two N-Channel power MOSFETs
used as synchronous rectifiers in resonant converter applications. The IC can control one or more paralleled
N MOSFETs to emulate the behavior of Schottky diode rectifiers. The drain to source for each rectifier
MOSFET voltage is sensed differentially to determine the level of the current and the power switch is turned
ON and OFF in close proximity of the zero current transition. The anti shoot-through protection logic prevents
both channels from turning on the power switches at the same time. 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 that allows reliable operation in fixed and variable frequency
applications.
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