Click here for production status of specific part numbers. MAX77751 3.15A USB-C Autonomous Charger for 1-Cell Li+ Batteries Benefits and Features General Description Up to 16V Protection The MAX77751 is a standalone, 3.15A charger with 13.7V Maximum Input Operating Voltage integrated USB Type-C CC detection and reverse 3.15A Maximum Charging Current boost capability. The fast-charge current and top-off 6A Discharge Current Protection current thresholds are easily configured with resistors. No Firmware or Communication Required The MAX77751 operates with an input voltage of 4.5V Integrated USB Detection to 13.7V and has a maximum input current limit of 3A. CC Detection for USB Type-C The IC also implements the adaptive input current limit BC1.2 Detection for Legacy SDP, DCP, and CDP (AICL) function that regulates the input voltage by Automatic Input Current Limit Configuration reducing input current, to prevent the voltage of a weak Input Voltage Regulation with Adaptive Input adapter from collapsing or folding back. Current Limit (AICL) The USB Type-C Configuration Channel (CC) detection Reverse Boost Capability up to 5.1V, 1.5A pins on the MAX77751 enable automatic USB Type C Pin Control of All Functions power source detection and input current limit Resistor-Configurable Fast-Charge Current configuration. To support a variety of legacy USB as well Resistor-Configurable Top-Off Current as proprietary adapters, the IC also integrates BC1.2 ENBST Pin to Enable and Disable Reverse Boost detection using the D+ and D- pins. The IC runs the CC STAT Pin to Indicate Charging Status detection and BC1.2 detection automatically without any INOKB Pin to Indicate Input Power-OK (POK) software as soon as the USB plug is inserted. ITOPOFF Pin to Disable Charge The IC also offers Reverse-Boost capability up to 5.1V, Integrated Battery True-Disconnect FET 1.5A, which can be enabled with the ENBST pin. The 3mm x 3mm, 24 Lead FC2QFN Package STAT pin indicates charging status, while the INOKB pin indicates valid input voltage. Charging can be stopped by pulling the ITOPOFF pin low. Ordering Information appears at end of data sheet. The MAX77751 is equipped with a Smart Power Selector and a battery true-disconnect FET to control the charging and discharging of the battery or isolate the battery in case of a fault. The MAX77751 is offered in several variants to support Li-ion batteries with various termination voltages from 4.1V to 4.5V. The IC comes in a 3mm x 3mm, 0.4mm pitch 24-lead FC2QFN package making it suitable for low-cost PCB assembly. Applications Mobile Point-of-Sale (mPOS) Terminals Portable Medical Devices Wireless Headphones GPS Trackers Charging Cradles for Wearable Devices Power Banks Mobile Routers USB Type-C is a registered trademark of USB Implementers Forum. Smart Power Selector is a trademark of Maxim Integrated Products, Inc. 19-100802 Rev 4 11/20 MAX77751 3.15A USB-C Autonomous Charger for 1-Cell Li+ Batteries Simplified Block Diagram 4.5V TO 13.7V/3A CHGIN BYP 10F + 2.2F 22F USB TYPE-C CONNECTOR DP BST DN 0.1F CC2 LX CC1 MAX77751 0.47H VSYS SYS SYS 2.2F 2x10F PVL INOKB PGND STAT ENBST 3.15A BATT IFAST 10F 2.2F VDD ITOPOFF GND www.maximintegrated.com Maxim Integrated 2