29 January 2020
Power Electronics / Power Management
The MP9989, made by Monolothic Power Systems, is a fast turn-off, intelligent rectifier for flyback converters that integrates a 100 V MOSFET. It can replace a diode rectifier for higher efficiency and power density. The chip regulates the forward voltage drop of the internal power switch to 40&nbs;mV and turns off before the drain-source voltage reverses.
The MP9989 can generate its own supply voltage without the need for an auxiliary winding, which makes it suitable for charger applications with a low output voltage requirement or any other adaptor applications with high-side set-up. The internal ringing detection circuitry prevents the MP9989 from falsely turning on during discontinuous conduction mode (DCM) or quasi-resonant operations.
The MP9989 is available in SOIC-8 and QFN4x5-8 packages.
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