BCD Semiconductor Manufacturing Limited AP3703
The AP3703 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 · Secondary CV/CC Control Circuitry Eliminating (PFM) method to build discontinuous conduction Opto-Coupler mode (DCM) flyback power supplies. It also · Random Frequency Modulation to Reduce eliminates the need of loop compensation circuitry while maintaining stability.| Part No. | AP3703 |
|---|---|
| Datasheet | AP3703 Download |
| Manufacturer |  BCD Semiconductor Manufacturing Limited |
| Description | LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER |
| Buy | Stock & Price |
GENERAL DESCRIPTION
FEATURES
AP3703● No Need for Control Loop Compensation Circuitry The AP3703 provides accurate constant voltage, con-
● Flyback Topology in DCM Operation stant current (CV/CC) regulation while removing the opto-coupler and secondary control circuitry. The AP3703 achieves
● System EMI Maximum Switching Frequency: 60kHz excellent regulation and high average efficiency, yet
● Built-in Soft Start meets the requirement for no-load consumption less
● Open Feedback Protection than 100mW.
● Over Voltage Protection
● Short Circuit Protection The AP3703 is available in SOT-23-5 package.
● Small SOT-23-5 package to achieve compact size and less component
APPLICATIONS
● Adapters/Chargers for Cell/Cordless Phones, PDAs, MP3 and Other Portable Apparatus● Standby and Auxiliary Power Supplies
● LED Driver Dec. 2011 Rev. 1. 6 SOT-23-5 Figure 1. Package Type of AP3703 BCD Semiconductor Manufacturing Limited 1 Preliminary Datasheet LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER Pin Configuration AP3703 K Package (SOT-23-5) OUT 1 GND 2 VCC 3 5 FB 4 CS Figure 2.
