DESCRIPTION

The MP6908 is a low-drop diode emulator IC that, when combined with an external switch, replaces Schottky diodes in high-efficiency flyback converters. The MP6908 regulates the forward drop of an external synchronous rectifier (SR) MOSFET to about 40mV, which switches off once the voltage becomes negative.

The MP6908 can generate its own supply voltage for battery charging applications with a low output voltage or high-side rectification applications. Programmable ringing detection circuitry prevents the MP6908 from turning on falsely during discontinuous conduction mode (DCM) and quasi-resonant operation.

EV6908-S-01A is the evaluation board for MP6908.

FEATURES

 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 and Quasi-Resonant Operations

 Works with Standard and Logic Level SR MOSFETs

 Compatible with Energy Star

 ~30ns Fast Turn-Off and Turn-On Delay

 ~100μA Quiescent Current

 Supports DCM, CCM, and Quasi-Resonant Operations

 Supports both High-Side and Low-Side Rectification

 TSOT23-6 Package Available

APPLICATIONS

 USB PD Quick Chargers

 Adaptors

 Flyback Power Supplies with Very Low and/or Variable Output Voltage