AP3785TMTR-G1

AP3785T PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER Description Pin Assignments NEW PRODUCT The AP3785T is a high performance AC/DC power supply controller for battery charger and adapter applications. It can meet less than 10mW standby power for “Super Star” charger criteria. The device uses Pulse Frequency Modulation (PFM) method to build discontinuous conduction mode (DCM) flyback power supplies. (Top View) The AP3785T provides accurate constant voltage (CV), constant current (CC) and outstanding dynamic performance without requiring an opto-coupler. It also eliminates the need of loop compensation circuitry while maintaining stability. CS 1 8 FB EM 2 7 CBC VCC 3 6 OTP OUT 4 5 GND The AP3785T is equipped with both cable drop compensation function to meet various cables with different lengths and gauges and adjustable line voltage compensation function. SO-8 When AP3785T is used with AP4341 or synchronous rectifier series (for example APR343 + MOSFET, APR3415, APR34330), better Features under-shoot performance and higher conversion efficiency can be achieved. The AP3785T has internal over temperature protection for itself, and also provides dedicated pin for external over temperature protection. This IC is available in SO-8 package.  Primary Side Control for Eliminating Opto-coupler  10mW No-load Input Power  Flyback Topology in DCM Operation  External Adjustable Line Compensation for CC  External Adjustable Cable Compensation for CV  Multiple PWM/PFM Control Mode to Improve Audio Noise and Efficiency  VCS Jitter to Reduce System EMI  Valley-on for the Higher Efficiency and Better EMI  Applications   Adapter/Chargers for Shaver, Cell/Cordless Phones, PDAs, MP3 and Other Portable Apparatus Multiple Protections:  Over Voltage Protection (OVP)  Output Short Circuit Protection (SCP)  Transformer Saturation Protection (TSP) via Primary Peak Standby and Auxiliary Power Supplies Current Limitation  Notes: OTP and External Over Temperature Protection (OTP)  Matching AP4341 with Schottky Synchronous Rectifier Solution  SO-8 Package  Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2)  Halogen and Antimony Free. “Green” Device (Note 3) or APR343/APR3415 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain