BCD Semiconductor Manufacturing Limited AP3765
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. It also · Eliminates Control Loop Compensation Circuitry eliminates the need of loop compensation circuitry · Flyback Topology in DCM Operation while maintaining stability.GENERAL DESCRIPTION
FEATURES
AP3765●
● 30mW 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. 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 30mW.
● 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 Datasheet LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER Pin Configuration AP3765 K6 Package (SOT-23-6) Pin 1 Dot by Marking OUT 1 GND 2 VCC 3 6 FB 5 GND 4 CS Figure 2.