Smartrectifier IC has MOT protection circuitry

Applications include laptops, LCD and PDP televisions, game consoles, and server and telecom Switch Mode Power Supplies (SMPS).

Featuring IR's 200V IC technology, the IR11672A is a smart secondary-side synchronous-rectification (SR) controller designed to drive N-Channel power MOSFETs used as synchronous rectifiers in isolated flyback and resonant half-bridge converters.

As a result of the device's MOT protection circuitry, reverse current is prevented at very light load or no-load conditions in flyback and resonant half-bridge converters, while power shutdown spikes that cause avalanche breakdown in resonant half-bridge converters are minimised during power off for highly reliable operation.

The IR11672A accurately determines turn on and turn off based on MOSFET drain-sensing voltage in close proximity to zero-current transition, eliminating the need for additional components, including heatsink, to simplify design.

Ruggedness and noise immunity are accomplished using an advanced blanking scheme and double-pulse suppression to allow reliable operation in fixed and variable-frequency applications.

Other key features include maximum 500kHz switching frequency, enable pin, anti-bounce logic and UVLO protection, 7A-peak turn-off gate-drive current, micropower start up and ultra-low quiescent current.

The IR11672A also features 10.7V gate-drive clamp, 50ns turn-off propagation delay and a Vcc operating range from 11.3 to 20V.

The device is offered lead free and is RoHS compliant.