AP3783

AP3783 PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER Description Pin Assignments The AP3783 is a high performance AC/DC power supply controller for battery charger and adapter applications. The controller regulates the output voltage and current in the primary side by piece-wise Pulse Frequency Modulation (p-PFM) in discontinuous conduction mode (DCM). (Top View) Pin 1 Mark The AP3783 provides accurate constant voltage (CV), constant current (CC) and outstanding dynamic performance without requiring an opto-coupler. It also eliminates the need of loop compensation circuitry while maintaining stability. The AP3783 provides valley turn-on function, operating frequency Jitter function (about 5.5% frequency change every 256μs) from light to full load range and 3-segment drive current to improve the power supply EMI performance. The AP3783 also has built-in fixed cable voltage drop compensation (10%, 7% and 4% of nominal system output voltage to meet various cables with different length and gauge) and adjustable line voltage compensation. The AP3783 is packaged in SOT26. Applications  Adapters/Chargers  LED Lighting  Standby and Auxiliary Power Supplies CS 1 GND 2 VCC 3 6 CPC 5 DRI 4 FB SOT26 Features  Less than 75mW Standby Power Consumption  Meet Efficiency Requirement of COC Trier2  Valley Turn-on to Reduce Switching Loss and Improve EMI  Piece-wise Frequency Reduction to Enhance Conversion Efficiency and Suppress Audio Noise  Over Voltage Protec...