APR34309C Datasheet | Diodes Incorporated

Description APR34309C is a secondary side bo IC, which bines an NChannel MOSFET and a driver circuit designed for synchronous rectification (SR) in DCM operation. It also integrates output voltage detect function for primary side control system. The N-Channel MOSFET has been optimized for low gate charge, low RDS(ON), fast switching speed and body diode reverse recovery performance. The synchronous rectification can effectively reduce the secondary side rectifier power dissipation and provide high performance solution. By sensing MOSFET drain-to-source voltage, APR34309C can output ideal drive signal with less external ponents. It can provide high performance solution for 5V output voltage application. Same as AP4341, APR34309C detects the output voltage and provides a periodical signal when the output voltage is lower than a certain threshold. By fast response to secondary side voltage, APR34309C can effectively improve the transient performance of primary side control system. The APR34309C is available in SO-8EP package. Features - - - - Synchronous Rectification for DCM Operation Flyback Eliminate Resonant Ring Interference Fast Detector of Supply Voltages Fewest External ponents - Totally Lead-free & Fully Ro HS pliant (Notes 1 & 2) - Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments (Top View) DRISR 1 VDET 2 AREF 3 VCC 4 8 GND 7 GND 6 GND 5 DRAIN Note: The DRAIN pin of internal MOSFET is exposed PAD, which is at the bottom of IC (the dashed box). The secondary current should flow from GND(pin 6,7,8) to this exposed PAD. SO-8EP Applications - Adapters/Chargers for Cell/Cordless Phones, ADSL Modems, MP3 - and Other Portable Apparatus Standby and Auxiliary Power Supplies Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (Ro HS) & 2011/65/EU (Ro HS 2) pliant. 2. See http://.diodes./quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3....