APR348

NEW PRODUCT APR348 SECONDARY SIDE SYNCHRONOUS RECTIFICATION CONTROLLER Description The APR348 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. Pin Assignments (Top View) The APR348 can support continuous or discontinuous conduction mode (CCM and DCM) and quasi-resonant flyback operation based on a MOSFET operating on-time control technology. This technology provides minimized turn-on and turn-off delay to reduce power loss and keep safe operation without adding any external components or circuitry. VCC 1 GND 2 Rx 3 6 VDET 5 DRISR 4 VDD The APR348 can configure into high-side or low-side application to fit various design requirement. It also has specialized light load mode and determines safe driver pulse generation through load detection. The VDD power supply can be charged by VDET or VCC, which means it can be charged by internal PLR (Pulse linear regulator) at low output voltage and charged by internal LDO at high output voltage. Therefore, it can provide a wide output operation voltage from 3.3V to 20V. SOT26 (Type CJ) The APR348 is available in SOT26 (Type CJ) package. Features  Synchronous Rectification Controller  Suited for High-Side and Low-Side Flyback Converters in CCM/DCM/QR Operation  Minimized Turn-On and Turn-Off Delay  Internal UVLO Protection  Light Load Mode Control  Eliminate False Turn-On with Resonant Ring  F...