General Description
The AP3703 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.
   
Features
• Primary Side Control for Rectangular Constant
    Current and Constant Voltage Output
• Secondary CV/CC Control Circuitry Eliminating
    Opto-Coupler
• No Need for Control Loop Compensation
    Circuitry
• Flyback Topology in DCM Operation
• Random Frequency Modulation to Reduce
    System EMI
• Built-in Soft Start
• Open Feedback Protection
• Over Voltage Protection
• Short Circuit Protection
• 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 Dri