Product Brief PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS Description Parametric Table The AP3706 is a high performance AC/DC power supply controller for battery charger and adapter applications. The device uses Pulse Frequency Modulation (PFM) method to build discontinuous conduction mode (DCM) flyback power supplies. Startup Current (µA)(Typ) UVLO Threshold on/off (V) (Typ) The AP3706 provides constant voltage, constant current (CV/CC) regulation without requiring an opto-coupler and secondary control circuitry. It also eliminates the need of loop compensation circuitry while maintaining stability. The AP3706 achieves excellent regulation and high power efficiency, the no-load power consumption is less than 200mW at 265VAC input. Standby Power (W) <0.3 Package SOIC-8 Applications · Adapters/Chargers for Cell/Cordless Phones, PDAs, MP3 and Other Portable Apparatus Standby and Auxiliary Power Supplies Benefits · · · · · · · · · · · Mar. 2008 18.5/7.4 680 Features · 70 Operating Current (µA) (Typ) · Primary Side Control for Rectangular Constant Current and Constant Voltage Output Eliminates Opto-Coupler and Secondary CV/CC Control Circuitry Eliminates Control Loop Compensation Circuitry Flyback Topology in DCM Operation Random Frequency Modulation to Reduce System EMI Valley Turn on of External Power NPN Transistor Built-in Soft Start Open Circuit Protection Over Voltage Protection Short Circuit Protection AP3706 High Power Efficiency for Battery Chargers Low Total Cost Additional Available Materials · · · · · Samples Preliminary Datasheet ESD Report Demo Board Application Note BCD Semiconductor Manufacturing Limited Product Brief PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS AP3706 Pin Configuration M Package CS 1 8 COMP VCC 2 7 BIAS OUT 3 6 VDD GND 4 5 FB Ordering Information Example Package Temperature Range SOIC-8 -40 to 85oC Part Number Marking ID Packing Type AP3706M-E1 3706M-E1 Tube AP3706MTR-E1 3706M-E1 Tape & Reel Detailed information please refer to the relevant datasheet. Sales Office: Shanghai No. 1600, Zi Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, China Tel : 86-21-24162266 Fax : 86-21-24162277 USA 30920 Huntwood Ave. Hayward, CA 94544, USA Tel : +1-510-324-2988 Fax : +1-510-324-2788 Taiwan 4F, 298-1 Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel : 886-2-2656-2808 Fax : 886-2-2656-2806 Shenzhen Room E, 5F, Noble Center, No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China Tel : 86-755-8826 7951 Fax : 86-755-8826 7865 Mar. 2008 BCD Semiconductor Manufacturing Limited