23V 3.2A USB-C Buck-Boost Charger with Integrated FETs for 2S Li-Ion Batteries

The MAX77962 is a high-performance wide-input 3.2A buck-boost charger with a Smart Power Selector™ and operates as a reverse buck without an additional inductor, allowing the IC to power USB On-the-Go (OTG) accessories. The device integrates low-loss power switches, and provides small solution size, high efficiency, low heat, and fast battery charging. The reverse buck has true-load disconnect and is protected by an adjustable output current limit. The device is highly flexible and programmable through I2C configuration or autonomously through resistor configuration.

The battery charger includes a Smart Power Selector to accommodate a wide range of battery sizes and system loads. The Smart Power Selector allows the system to start up gracefully when an input source is available even when the battery is deeply discharged (dead battery) or missing. For battery safety/authentication reasons, the IC can be configured to keep charging disabled, and allow the DC-DC to switch and regulate the SYS voltage. The system processor can later enable charging using the appropriate I2C commands. Alternatively, the IC can be con- figured to automatically start charging.

Applications

* USB Type-C Powered Wide-Input Charging Applications * 2-Cell Battery Powered Devices

Analog Devices is in the process of updating documentation to provide culturally appropriate terminology and language. This is a process with a wide scope and will be phased in as quickly as possible. Thank you for your patience. Smart Power Selector is a trademark of Maxim Integrated Products, Inc.

* 3.5V to 23V Input Operating Range, 30VDC Withstand Voltage* 97% Peak Efficiency at 9VIN/7.4VOUT/1.5AOUT * Reverse Leakage Protection * 50mA to 3.15A Programmable Input Current Limit * 50mA to 3.2A Programmable Constant Current Charge * Remote Differential Voltage Sensing * 600kHz or 1.2MHz Switching Frequency Options * System Instant On with Smart Power Selector Power-Path * ​Charge Safety Timer * Die Temperature Regulation with Thermal Foldback Loop * Input Power Management with Adaptive Input Current Limit (AICL) and Input Voltage Regulation * 10mΩ BATT to SYS Switch, Up to 10A Overcurrent Threshold * ​Reverse Buck Mode 5.1V/1.5A to Support USB OTG * JEITA Compliant with NTC Thermistor Monitor * I2C or Resistor Programmable * 3.458mm x 3.458mm 49-Bump WLP