Click here to ask an associate for production status of specific part numbers. MAX77757 3.15A USB Type-C Autonomous Charger with JEITA for 1-Cell Li-ion/LiFePO4 Batteries Benefits and Features General Description Up to 16V Protection The MAX77757 is a standalone 3.15A charger with 13.7V Maximum Input Operating Voltage integrated USB Type-C CC detection with JEITA 3.15A Maximum Charging Current compliance that supports reverse boost capability. The 6A Discharge Current Protection fast-charge current is easily configured with resistors. No Firmware or Communication Required The MAX77757 operates with an input voltage of 4.5V Integrated CC Detection for USB Type-C to 13.7V and has a maximum input current limit of 3A. Integrated BC1.2 Detection for Legacy SDP, The IC also implements the adaptive input current limit DCP, CDP, and DCD Timeout (AICL) function that regulates the input voltage by Integrated USB Detection for Common reducing input current to prevent the voltage of a weak Proprietary Charger Types adapter from collapsing or folding back. Automatic Input Current Limit Configuration The USB Type-C Configuration Channel (CC) detection Input Voltage Regulation with Adaptive Input pins on the MAX77757 enable automatic USB Type-C Current Limit (AICL) power source detection and input current limit Reverse Boost Capability up to 5.1V, 1.5A configuration. To support a variety of legacy USB types Termination Voltage as well as proprietary adapters, the IC also integrates 4.1V to 4.5V for Li-ion and Li-poly Batteries BC1.2 detection using the D+ and D- pins. The IC runs 3.6V/3.7V for LiFePO Battery 4 the CC pin and BC1.2 detection automatically as soon as a USB plug is inserted without any software control. Safety Charge Safety Timer The IC also offers reverse-boost capability up to 5.1V JEITA Compliance with NTC Thermistor and 1.5A, which can be enabled with the ENBST pin. (MAX77757J) The STAT pin indicates charging status while the INOKB HOT/COLD Stop Charging with NTC Thermistor pin indicates valid input voltage. Charging can be (MAX77757H) stopped by pulling the THM pin low. Thermal Shutdown The MAX77757 is equipped with a Smart Power Pin Control of All Functions Selector and a battery true-disconnect FET to control Resistor Configurable Fast-Charge Current the charging and discharging of the battery or to isolate ENBST Pin to Enable and Disable Reverse Boost the battery in case of a fault. The MAX77757 is offered STAT Pin to Indicate Charging Status in several variants to support Li-ion batteries with various INOKB Pin to Indicate Input Power-OK termination voltages from 4.1V to 4.5V. It also has a 3.6V THM Pin to Disable Charge termination voltage option for LiFePO batteries. The IC 4 Integrated Power Path comes in a 3mm x 3mm, 0.4mm pitch, 24-lead FC2QFN Integrated Battery True-Disconnect FET package making it suitable for low-cost PCB assembly. 3mm x 3mm, 24-Lead FC2QFN Package Applications Ordering Information appears at end of data sheet. Mobile Point-of-Sale (mPOS) Terminals Portable Medical Devices Wireless Headphones GPS Trackers Charging Cradles for Wearable Devices Power Banks Mobile Routers 19-100986 Rev 2 6/21 MAX77757 3.15A USB Type-C Autonomous Charger with JEITA for 1-Cell Li-ion/LiFePO4 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 MAX77757 0.47H V SYS SYS SYS 2.2F PVL 2x10F INOKB PGND STAT ENBST 3.15A BATT IFAST 10F V PVL 2.2F V DD THM GND T THERMISTOR www.maximintegrated.com Maxim Integrated 2