DESCRIPTION

The MP9989 is a fast turn-off, intelligent rectifier

for flyback converters that integrates a 100V

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 40mV(1) and turns off before the

drain-source voltage reverses.

The MP9989 can generate its own supply

voltage without the need for 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 quasiresonant operations.

The MP9989 is available in SOIC-8 and

QFN4x5-8 packages.

FEATURES

 Integrated 100V/10mΩ MOSFET

 Wide Output Range down to 0V

 No Need for Auxiliary Winding for High-Side

or Low-Side Rectification

 Ringing Detection Prevents False Turn-On

during DCM Operations

 Compatible with Energy Star

 110µA Quiescent Current

 Supports DCM, CCM, and Quasi-Resonant

Operations

 Available in SOIC-8 and QFN4x5-8

Packages

APPLICATIONS

 Laptop Adapters

 QC and USB PD Charger

 High-Efficiency Flyback Converters