MP9989

CCM/DCM Flyback Ideal Diode

with Integrated 100V

/10mΩ MOSFET

and No Need for Auxiliary Winding

MP9989 Rev. 1.1

www.MonolithicPower.com

1

8/27/2020

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2020 MPS. All Rights Reserved.

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 quasi-

resonant 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

All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For

MPS green status, please visit the MPS website under Quality Assurance.

“MPS”,

the MPS logo,

and “Simple, Easy Solutions” are registered trademarks of

Monolithic Power Systems, Inc. or its subsidiaries.

Note:

1)

Related issued patent: US Patent US8, 067,973; US8,400,790. CN

Patent ZL201010504140.4. Other patents pending.

TYPICAL APPLICATION

SENSE

VS

VDD

VD

MP9989