AP3783
PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER
Description
Pin Assignments
The AP3783 is a high...
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...