AP3983R PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER Description Pin Assignments The AP3983R is a power switcher for power supplies with better (Top View) conversion efficiency, better voltage & current accuracy, and improved protection functions. Typical applications include chargers and CPC 1 7 GND adapters. The AP3983R with built-in MOSFET, regulates the output FB 2 voltage and current in the primary side by piecewise Pulse Frequency Modulation (p-PFM) in discontinuous conduction mode (DCM). The VCC 3 6 D system operating frequency reduces linearly from heavy load to light load in each interval of the p-PFM, and enters constant current mode CS 5 4 D when the load current equals to the maximum system output current. SO-7 (M Package) For AP3983R The AP3983R provides accurate constant voltage (CV), constant current (CC) and outstanding dynamic performance without requiring an opto-coupler. It also eliminates the need for loop compensation Features circuitry while maintaining stability. Built-in N Channel MOSFET with 700 BV DSS The AP3983R has a built-in fixed cable voltage drop compensation of Less than 75mW Standby Power Consumption 8% and adjustable line-voltage compensation. Meet Efficiency Requirement of COC Trier 2 Valley Turn-on to Reduce Switching Loss and Improve EMI The AP3983R achieves excellent regulation and high average Piecewise Frequency Reduction to Enhance Conversion efficiency, less than 2s startup time for 75mW standby power solution. Efficiency and Suppress Audio Noise When the AP3983R is adopted with APR3415, good undershoot Overvoltage Protection (OVP) performances can be achieved. Over-Temperature Protection (OTP) Short Circuit Protection (SCP) with Hiccup The AP3983R is packaged in SO-7. Operating Frequency Jitter Function for Conductive EMI Suppression Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Applications Adapters/Chargers Standby and Auxiliary Power Supplies Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AP3983R Typical Applications Circuit FR1 T1 L1 R1 C3 R4 Ns C6 Np + D1~D4 R13 R3 J1 C7 R9 C2 C1 + + AC 90-264V R2 D6 U2 APR3415B D5 R5 DRAIN GND R11 + Nfb DRAIN GND C4 L2 VDET VCC C8 R10 DRISR AREF 3 R12 U1 5,6 Vcc R6 D 7 C5 CY1 CPC Gnd 1 FB CS 4 2 R8 R7 RS1 Figure 1 Typical Application Circuit of AP3983R Pin Descriptions Pin Number Pin Name Function A capacitor about 50nF should be connected to this pin. The voltage of CPC pin is 1 CPC linear to load of the system and it is used for the functions of cable voltage drop compensation and audio noise suppression 2 FB The CV and CC regulation are realized based on the voltage sampling of this pin The VCC pin supplies the power for the IC. In order to get the correct operation of 3 VCC the IC, a capacitor should be placed as close as possible to the VCC pin The CS is the current sense pin of the IC. The IC will turn off the power MOSFET 4 CS according to the voltage on the CS pin 5, 6 Drain High Voltage of MOSFET 7 GND The ground of the switcher 2 of 15 AP3983R June 2016 Diodes Incorporated www.diodes.com Document number: DS38247 Rev. 3 - 2 ADVANCED INFORMATION NEW PRODUCT