AP3127KTR-G1

AP3127/H GREEN MODE PWM CONTROLLER Description Pin Assignments NEW PRODUCT The AP3127/H is a current mode PWM controller which is optimized for high performance, low standby power and cost effective offline flyback converters. The AP3127/H coordinating with Diodes’ secondary side controller AP4320 and protocol decoding IC AP4370 provide a Flyback charger/adapter solution compatible to Qualcomm Quick Charge 2.0 protocol. (Top View) Pin 1 Mark The PWM switching frequency at normal operation is internally fixed (about 65kHz for AP3127 and 100kHz for AP3127H). In middle load, the IC will enter green mode to improve system efficiency with the help of frequency foldback. A minimum switching frequency (about 20kHz) is set to avoid the audible noise. 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. 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. GND 1 6 GATE FB 2 5 VCC SOVP/UVP 3 4 SENSE 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. AP3127/H combines secondary side OVP (SOVP) and UVP. Features                Very Low Start-up Current Current Mode Control Non-audible-noise Green-mode Control Internal Slope Compensation Soft Start During Startup Process Frequency Fold Back for High Average Efficiency 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 UVP Mini Size Package of SOT26 Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Notes: SOT26 Applications      Quick Charger 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