AP3765 Datasheet | BCD Semiconductor

Preliminary Datasheet LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER General Description Features The AP3765 is a high performance AC/DC power sup- - Primary Side Control for Rectangular Constant ply controller for battery charger and adapter applica- Current and Constant Voltage Output tions. The device uses Pulse Frequency Modulation - Sub-microampere Start-up Current (PFM) method to build discontinuous conduction mode (DCM) flyback power supplies. - - 30m W No-load Input Power Feasible Tight CV Regulation Performance The AP3765 provides accurate constant voltage, constant current (CV/CC) regulation while removing the - Eliminates Opto-coupler and Secondary CV/CC Control Circuitry opto-coupler and secondary control circuitry. It also - Eliminates Control Loop pensation Circuitry eliminates the need of loop pensation circuitry - Flyback Topology in DCM Operation while maintaining stability. The AP3765 achieves - Random Frequency Modulation to Reduce excellent regulation and high average efficiency, yet System EMI meets the requirement for no-load consumption less - Built-in Soft Start than 30m W. - Open Feedback Protection The AP3765 is available in SOT-23-6 package. - Short Circuit Protection - SOT-23-6 Package Applications - Adapters/Chargers for Cell/Cordless Phones, PDAs, MP3 and Other Portable Apparatus - LED Drivers - Standby and Auxiliary Power Supplies Sep. 2010 Rev. 1. 2 SOT-23-6 Figure 1. Package Type of AP3765 BCD Semiconductor Manufacturing Limited 1 Preliminary...