Secondary-Side Synchronous Rectifier

FEATURES

◆   Supports both High-side and Low-side rectification

◆   No need external power supply

◆  Supports DCM, BCM, CCM and Quasi-Resonant operation

◆  Supports the Flyback topology

◆  Low quiescent current

◆  Under-voltage protection

◆  Fast driver capability for CCM operation

◆  SOP-8 package

APPLICATIONS

◆   Adapters/Chargers

◆   Flyback converters

GENERAL DESCRIPTION

SF7719X is a high performance secondary side switch for synchronous rectification (SR) of flyback.

Using SF7719X to replace diode can effectively reduce the secondary side rectifier power dissipation and increase efficiency for system.

SF7719X turns on the internal MOSFET When it senses VDS of internal MOSFET less than -300mV and turns off the internal MOSFET when the VSWS is greater than -10mV.

SF7719X supports multiple operation modes, such as DCM, BCM, CCM and Quasi-Resonant.

SF7719X is offered in SOP8 package.