AP3171 Datasheet | Diodes Incorporated

Description Pin Assignments The AP3171 is a constant voltage (CV), constant current (CC) and synchronous rectification buck converter patible with Qualm Quick Charge 2.0. (Top View) AP3171 bines PWM controller, high/low side power MOSFETs, CC/CV control and Qualm QC 2.0 decoder in one package so as to achieve high performance with pact profile. According to different D+/D- signal binations, the AP3171 will set the output voltage and full current capabilities to 5V/2A, 9V/2A or 12V/1.5A respectively. The AP3171 automatically provides 5V/2A output configuration to backwards patible to the existing devices that are not patible to Qualm QC 2.0. AP3171 has a fixed switching frequency of 120k Hz at heavy load, while at light load and no load, its zero current detection (ZCD) function takes effect to have the system enter into discontinuous current mode (DCM) to improve power conversion efficiency. The AP3171 has versatile protection functions to guarantee a safe operation, including input voltage under voltage lock-out (UVLO), output voltage over voltage protection (OVP) and under voltage protection (UVP), inductor peak current limit and Internal over temperature protection (OTP). Furthermore, AP3171 has cable pensation and it is adjustable by the external resistor. The AP3171 is available in SO-8EP package. Features VCC 1 CABLE 2 D+ 3 D- 4 PHASE 8 GND 7 CMP 6 VSEN 5 OUT Note: The PHASE pin of BUCK converter is exposed PAD, which is at bottom of the IC (the dashed box). SO-8EP Applications - Car Charger - Automotive Power application - General DC/DC Application Need CC/CV Mode - 8.7V to 40V Input Voltage Range - Fixed 120k Operating Frequency - Integrated Two MOSFETs for Synchronization Rectification - Quick Charge Function patible with Qualm QC 2.0 Protocol - Input Protection - UVLO - Output Protection - UVP/OVP - OCP Function - Adjustable Cable pensation - Output CC/CV Mode Function - Reference Accuracy : CV ±1.5% CC ±4% (5V) CV ±2.5% CC ±5% (9V/12V) - Output...