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