The MP6919 is a fast turn-off, intelligent rectifier for flyback converters that integrates a 100V MOSFET. It offers higher efficiency and power density than a diode rectifier. The chip regulates the forward voltage drop of the internal power switch to 40mV (1), and turns off before the drain-source voltage reverses.
The device generates its own supply voltage without requiring auxiliary winding. This feature makes it suitable for charger applications with a low output voltage requirement, or any other adapter applications with high-side set-up. The internal ringing detection circuitry prevents the MP6919 from falsely turning on during discontinuous conduction mode (DCM) or quasi-resonant operations.
The MP6919 is available in an SOIC-8 package.