AP3766K6TR-G1 Diodes Incorporated

A Product Line of Diodes Incorporated AP3766 LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER Description Pin Assignments The AP3766 is a high performance AC/DC power supply controller for (Top View) LED drivers, battery charger and adapter applications. The device uses Pulse Frequency Modulation (PFM) method to build discontinuous conduction mode (DCM) flyback power supplies. Pin 1 Mark The AP3766 provides accurate constant voltage, constant current (CV/CC) regulation while removing the opto-coupler and secondary 6 FB OUT 1 control circuitry. It also eliminates the need of loop compensation circuitry while maintaining stability. The AP3766 achieves excellent regulation and high average efficiency, yet meets the requirement for GND 5 GND 2 no-load consumption less than 30mW. VCC 3 4 CS The AP3766 is available in SOT26 package. Features SOT26 Primary Side Control for Rectangular Constant Current and Constant Voltage Output Sub-microampere Start-up Current Applications 30mW No-load Input Power Feasible Tight CC Regulation Performance LED Drivers Eliminates Opto-coupler and Secondary CV/CC Control Circuitry Adapters/Chargers for Cell/Cordless Phones, PDAs, MP3 and Eliminates Control Loop Compensation Circuitry Other Portable Apparatus Flyback Topology in DCM Operation Standby and Auxiliary Power Supplies Random Frequency Modulation to Reduce System EMI Built-in Soft Start Open Feedback Protection Short Circuit Protection SOT26 Package 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 A Product Line of Diodes Incorporated AP3766 Pin Descriptions Pin Number Pin Name Function 1 OUT This pin drives the base of external power NPN switch 2, 5 GND Ground 3 VCC Supply voltage 4 CS The primary current sense 6 FB The voltage feedback from the auxiliary winding Functional Block Diagram VCC 3 0.1V 6 FB COMP t ONSEC Regulator t ONS Detector pfm & UVLO Bias OCkP EA 4.0V pfm 1 CV_ctrl Driver OUT R Q Constant Voltage Control S 4 Peak Current Control & LEB CS 2, 5 t ONS CC_ctrl R Q GND Constant Current Control S 2 of 8 AP3766 December 2014 Diodes Incorporated www.diodes.com Document number: DS37658 Rev.2 - 2 NEW PRODUCT