AP4340

Preliminary Datasheet DYNAMIC PSR ACCELERATOR AP4340 General Description The AP4340 is an output voltage detector for Primary Side Control System. It detects the output voltage and provides a periodical signal when the output voltage is lower than a certain threshold. The periodical signal can be coupled by the transformer to the primary side and provided as an awakening signal for the main primary side controller. By fast response to secondary side voltage, the AP4340 can effectively improve the transient performance of Primary Side Control System. The AP4340 is available in TO-92 and SOT-23 packages. Features Fast Detector of Supply Voltages 37kHz Output Pulse No External Components Applications · Adapters/Chargers for Cell/Cordless Phones, ADSL Modems, MP3 and Other Portable Apparatus · Standby and Auxiliary Power Supplies TO-92 (Bulk Packing) TO-92 (Ammo Packing) SOT-23 Aug. 2011 Rev. 1. 1 Figure 1. Package Types of AP4340 BCD Semiconductor Manufacturing Limited 1 DYNAMIC PSR ACCELERATOR Pin Configuration Z Package （TO-92 Bulk Packing） 3 OUT 2 GND 1 VCC N Package （SOT-23） 3 Preliminary Datasheet AP4340 Z Package （TO-92 Ammo Packing） 3 OUT 2 GND 1 VCC 12 Figure 2. Pin Configuration of AP4340 (Top View) Pin Description Pin Number TO-92 SOT-23 11 32 23 Pin Name Function VCC OUT GND This pin is the positive supply voltage input. VCC signal is also used to detect the secondary output voltage This pin supplies the pulse output current when VCC is lower ...