AP3785T

NEW PRODUCT AP3785T PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER Description 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. 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. 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. Pin Assignments (Top View) CS 1 EM 2 VCC 3 OUT 4 SO-8 8 FB 7 CBC 6 OTP 5 GND When AP3785T is used with AP4341 or synchronous rectifier series (for example APR343 + MOSFET, APR3415, APR34330), better 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. Applications  Adapter/Chargers for Shaver, Cell/Cordless Phones, PDAs, MP3 and Other Portable Apparatus  Standby and Auxiliary Power Supplies Features  Primary Side Control for Eliminating Opto-coupler  10mW No-load Input Po...