EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX77960B/MAX77961B 25V , 3A to 6A , USB-C Buck-Boost IN OUT OUT Charger with Integrated FETs for 2S/3S Li-Ion Batteries General Description Benefits and Features The MAX77960B/MAX77961B are high-performance 3.5V to 25.4V Input Operating Range, 30V DC wide-input 3A (MAX77960B)/6A (MAX77961B) buck- Withstand boost chargers with Smart Power Selector and operate 97% Peak Efficiency for 2S Battery at as a reverse buck converter without an additional inductor, 9V /7.4V /1.5A IN OUT OUT allowing the ICs to power USB on-the-go (OTG) acces- 97% Peak Efficiency for 3S Battery at sories. The devices integrate low-loss power switches and 15V /12.6V /2A IN OUT OUT provide high efficiency, low heat, and fast battery charging MAX77960B in a small solution size. The reverse buck has true load 100mA to 3.15A Programmable Input Current Limit disconnect and is protected by an adjustable output cur- 100mA to 3A Programmable Constant Current rent limit. The devices are highly flexible and programma- Charge 2 ble through I C configuration or autonomously through re- MAX77961B sistor configuration. 100mA to 6.3A Programmable Input Current Limit The battery charger includes the Smart Power Selector to 100mA to 6A Programmable Constant Current accommodate a wide range of battery sizes and system Charge loads. The Smart Power Selector allows the system to Remote Differential Voltage Sensing start up smoothly when an input source is available even 600kHz or 1.2MHz Switching Frequency Options when the battery is deeply discharged (dead battery) or System Instant On with Smart Power Selector Power missing. For battery safety/authentication reasons, the ICs Path can be configured to keep charging disabled, and allow Charge Safety Timer the DC-DC to switch and regulate the SYS voltage. The Die Temperature Regulation with Thermal Foldback 2 system processor can later enable charging using I C Loop commands as appropriate. Alternatively, the ICs can be Input Power Management with Adaptive Input Current configured to automatically start charging. Limit (AICL) and Input Voltage Regulation 10m BATT to SYS Switch, Up to 10A Overcurrent Applications Threshold USB Type-C Powered Wide-Input Charging Reverse Buck Mode 5.1V/3A to Support USB OTG Applications JEITA Compliant with NTC Thermistor Monitor 2- and 3-Cell Battery-Powered Devices 2 I C or Resistor Programmable Smartphones, Tablets, and 2-in-1 Laptops 4mm x 4mm, 30-Lead FC2QFN Medical Devices, Health and Fitness Monitors Digital Still, Video, and Action Cameras Ordering Information appears at end of data sheet. Handheld Computers and Terminals Handheld Radios Power Tools Drones Battery Backup Wireless Speakers Smart Power Selector is a trademark of Maxim Integrated Products, Inc. 19-101123 Rev 0 6/21MAX77960B/MAX77961B 25V , 3A to 6A , USB-C Buck-Boost IN OUT OUT Charger with Integrated FETs for 2S/3S Li-Ion Batteries Simplified Block Diagram SYS CHGIN V VSYS BUS SYSA Q1 Q3 CSINN PGND CSINP Q2 Q4 Q VPVL BAT PVL BATT V BATT BIAS AND VAVL REFERENCE AVL GATE DRIVER V AVL 2 OPTIONAL I C COMMUNICATION JEITA THM THM SCL SCL BATSP PK+ SDA 2 SDA I C INTERFACE AND INTB INTERRUPT INTB CHARGER AND OTG CONTROL PK- BATSN OTGEN OTGEN 2/3-CELL LI-ION BATTERY DISQBAT ISET DISQBAT STBY ITO STBY OPTIONAL RESISTOR INLIM PROGRAMMABILITY STAT VSET STAT CNFG VPVL UVLO INOKB OVLO GND OCP INOKB THERMAL MONITOR THERMAL SHDN MAX77960BMAX77960B MAX77961BMAX77961B www.maximintegrated.com Maxim Integrated 2 BST1 LX1 LX2 BST2