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