AP3125CMKTR-G1

NOT RECOMMENDED FOR NEW DESIGN – NO ALTERNATE PART AP3125CM GREEN MODE PWM CONTROLLER Description Pin Assignments The AP3125CM is a current mode PWM controller which is optimized for high performance, low standby power and cost effective offline flyback converters. (Top View) NEW PRODUCT The PWM switching frequency at normal operation is internally fixed (about 65kHz). In no load or light load, the IC will enter the burst mode to minimize standby power. Furthermore, the frequency dithering function is built-in to reduce EMI emission. Pin 1 Mark Internal slope compensation allows more stable Peak-Current Mode control over wide range of input voltage and load conditions. Internal line compensation ensures constant output power limit over entire universal line voltage range. Comprehensive protection features are included, such as cycle-bycycle current limit (OCP), VCC Over Voltage Protection (VOVP), internal OTP, Over Load Protection (OLP) and pins’ fault protection. AP3125CM combines secondary side OVP (SOVP) and external OTP. GND 1 6 GATE FB 2 5 VCC SOVP/OTP 3 4 SENSE SOT26 Features • • • • • • • • • • • • • Very Low Start-up Current Current Mode Control Internal Slope Compensation Soft Start During Startup Process Secondary Winding Short Protection with FOCP Soft Switching for Reducing EMI VCC Maintain Mode Useful Pin Fault Protection: SENSE Pin Floating FB/Opto-coupler Open/Short Comprehensive System Protection Feature: VCC Over Voltage Protection (VOVP) Over Load Protection (OLP) Secondary Side OVP (SOVP) and External OTP Mini Size Package of SOT26 Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Notes: Applications • • • • Switching AC-DC Adapter/Charger ATX/BTX Auxiliary Power Set-top Box (STB) Power Supply Open Frame Switching Power Supply 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain