AP3125HBKTR-G1 Diodes Incorporated

A Product Line of Diodes Incorporated AP3125HA/HB GREEN MODE PWM CONTROLLER Description Pin Assignments The AP3125HA/HB is a current mode PWM controller which is optimized for high performance, low standby power and cost effective (Top View) offline flyback converters. Pin 1 Mark The PWM switching frequency at normal operation is internally fixed (about 100kHz). 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 6 GATE GND 1 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. VCC FB 2 5 Internal slope compensation allows more stable Peak-Current Mode control over wide range of input voltage and load conditions. Internal CTRL SENSE line compensation ensures constant output power limit over entire 3 4 universal line voltage range. Comprehensive protection features are included, such as cycle-by- cycle current limit (OCP), VCC Over Voltage Protection (VOVP), SOT26 (For AP3125HA) internal OTP, Over Load Protection (OLP) and pins fault protection. AP3125HA features external OTP/OVP by using a minimal number of external components with CTRL pin. AP3125HB features built-in (Top View) Brownout (BNO) and Line Over Voltage Protection (LOVP). Pin 1 Mark Features 6 GATE GND 1 Very Low Start-up Current Current Mode Control VCC FB 2 5 Non-audible-noise Green-mode Control Internal Slope Compensation Soft Start During Startup Process BNO 3 4 SENSE Frequency Fold Back for High Average Efficiency Secondary Winding Short Protection with FOCP Soft Switching for Reducing EMI SOT26 (For AP3125HB) VCC Maintain Mode Brownout Protection (BNO, AP3125HB) Line Over Voltage Protection (LOVP, AP3125HB) Useful Pin Fault Protection: SENSE Pin Floating Applications CTRL Pin Short to Ground (AP3125HA) FB/Opto-coupler Open/Short Switching AC-DC Adapter/Charger Comprehensive System Protection Feature: ATX/BTX Auxiliary Power VCC Over Voltage Protection (VOVP) Set-top Box (STB) Power Supply Over Load Protection (OLP) Open Frame Switching Power Supply External OTP/OVP with CTRL Pin Protection (AP3125HA) Mini Size Package of SOT26 Pin to Pin Compatible with AP3125A/V/R/L/B 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 AP3125HA/HB Typical Applications Circuit L2 T1 C6 R6 C5 R4 C2 R13 C8 C7 R5 R19 C4 R14 C3 NTC U1 R8 R2 R3 VCC GATE R10 C1 R9 R15 C10 SENSE CTRL C11 R16 R11 R12 AP3125HA R17 R7 VR1 AZ431 C9 FB NTC R18 GND L2 T1 C6 R6 C5 R4 C2 R13 C8 C7 R5 R19 C4 R14 C3 NTC R8 R2 R3 VCC GATE R10 C1 R9 R15 BNO C10 R20 SENSE C11 R16 R11 R12 AP3125HB R17 R7 VR1 C9 C20 AZ431 FB R18 GND 2 of 13 AP3125HA/HB July 2014 Diodes Incorporated www.diodes.com Document number: DS37169 Rev. 3 - 2 NEW PRODUCT F1 F1 + + ~ ~ ~ - ~ ~ ~ -