AP3783AK6TR-G1 Diodes Incorporated

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 (Top View) output voltage and current in the primary side by piece-wise Pulse Frequency Modulation (p-PFM) in discontinuous conduction mode (DCM). Pin 1 Mark The AP3783 provides accurate constant voltage (CV), constant CPC CS 6 1 current (CC) and outstanding dynamic performance without requiring an opto-coupler. It also eliminates the need of loop compensation GND 2 5 DRI circuitry while maintaining stability. VCC FB The AP3783 provides valley turn-on function, operating frequency 3 4 Jitter function (about 5.5% frequency change every 256s) 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 SOT26 voltage drop compensation (4%, 7% and 12% of nominal system output voltage to meet various cables with different length and gauge) and adjustable line voltage compensation. Features Less than 75mW Standby Power Consumption The AP3783 is packaged in SOT26. Meet Efficiency Requirement of COC Trier2 Valley Turn-on to Reduce Switching Loss and Improve EMI Piece-wise Frequency Reduction to Enhance Conversion Applications Efficiency and Suppress Audio Noise Over Voltage Protection (OVP) Adapters/Chargers Over Temperature Protection (OTP) LED Lighting Short Circuit Protection (SCP) with Hiccup Standby and Auxiliary Power Supplies 3-Segment Drive Current for Radiative EMI Suppression Operating Frequency Jitter Function for Conductive EMI Suppression Drive MOSFET for 5W to 30W Battery Charger/Adapter Applications SOT26 SMD Package Comply with Level 3 of IPC/JEDEC J-STD- 033A Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AP3783 Typical Applications Circuit C2 R2 FR1 T1 D1 D IN L IN C1 R1 R ST1 Np + + Ns R DUMMY + + C C OUT2 OUT1 D R0 R ST2 C C IN1 IN2 12V/1.5A Da Ra 5V/2A + Na C VCC U1 C CPC CY1 1 6 CS CPC Q1 R FB1 Dg 2 5 GND DRI 3 Rg 4 VCC FB AP3783 R FB2 RCS Pin Descriptions Pin Number Pin Name Function The CS is the current sense pin of the IC. The IC will turn off the power MOSFET 1 CS according to the voltage on the CS pin 2 GND The ground of the controller The VCC pin supplies the power for the IC. In order to get the correct operation of 3 VCC the IC, a capacitor with low ESR should be placed as close as possible to the VCC pin 4 FB The CV and CC regulation are realized based on the voltage sampling of this pin 5 DRI Output pin to drive external MOSFET A capacitor about 50nF should be connected to this pin. The voltage of CPC pin is 6 CPC linear to load of the system and it is used for the functions of cable voltage drop compensation and audio noise suppression 2 of 17 AP3783 April 2016 Diodes Incorporated www.diodes.com Document number: DS37429 Rev. 7 - 2