AP4341SNTR-G1 Diodes Incorporated

AP4341S DYNAMIC PSR ACCELERATOR Description Pin Assignments The AP4341S is an output voltage detector for Primary Side Control (Top View) System. It is a low power loss solution. It detects the output voltage and provides a periodical signal when the output voltage is lower than GND a certain threshold. The periodical signal can be coupled by the transformer to the primary side and provided as an awakening signal 3 for the main primary side controller. By fast response to secondary side voltage, the AP4341S can effectively improve the transient performance of Primary Side Control System. The AP4341S will enable a discharge circuit when it detects the output voltage is higher than a certain threshold. 1 2 The AP4341S can cooperate with some PSR ICs, such as AP3775, VCC OUT GP350H and GP350BX. SOT23 The AP4341S is available in SOT23 package. Applications Features Fast Detector of Supply Voltages Adapters/Chargers for Cell/Cordless Phones, ADSL Modems, 33kHz Output Pulse MP3 and Other Portable Apparatus No External Components Standby and Auxiliary Power Supplies Low Power Loss for Green Mode Applications Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AP4341S Pin Descriptions Pin Number Pin Name Function Power supply pin, connected with one end of the secondary winding and the output 1 VCC capacitance 2 OUT Secondary detecting pin, connected with the other end of the secondary winding 3 GND Ground pin, connected with secondary side GND of the system Functional Block Diagram 1 2 VCC OUT - t ONP UVLO Detector UVLO V REF + - DYNAMIC OUT COMP Control + V REF Logic OSC - V DISCHARGE V DIS V REF COMP + VCC VCC V REF VCC - Band-gap OVP Discharge OVP V REF + 3 GND 2 of 8 AP4341S December 2015 Diodes Incorporated www.diodes.com Document number: DS38219 Rev. 2 - 2 NEW PRODUCT DRIVER