The DiodesZetex APR349 is a secondary-side MOSFET driver for synchronous rectification, which can effectively reduce the secondary-side rectifier power dissipation and provide a high-performance solution. The APR349 supports continuous or discontinuous conduction mode (CCM and DCM) and quasi-resonant fly back operation. It utilizes an intelligent control method to realize on-time control, which not only provides a short turn-on and turn-off delay to reduce power loss, but also eliminate the false trigger of resonant ring and keep safe operation without adding any external components or circuitry. The APR349 can be charged by internal PLR (Pulse Linear Regulator) at low system output voltage, and provide a wide output operation voltage from 3.3V to 24V. The APR349 is available in SOT26 (Type CJ) package.

Support fly back synchronous rectification with CCM/DCM/QR operation mode Intelligent control to minimize turn-on and turn-off delay Smart-blanking control to prevent shoot-through Supports both high-side and low-side application