EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX77960/MAX77961 25V 3A/6A USB-C Buck-Boost Charger IN OUT with Integrated FETs for 2S/3S Li-Ion Batteries General Description Benefits and Features The MAX77960/MAX77961 are high-performance wide- 3.5V to 25.4V Input Operating Range, 30V DC input 3A (MAX77960)/6A (MAX77961) buck-boost charg- Withstand ers with Smart Power Selector and operate as a reverse 97% Peak Efficiency for 2S Battery at buck converter without an additional inductor, allowing the 9V /7.4V /1.5A IN OUT OUT ICs to power USB on-the-go (OTG) accessories. The de- 97% Peak Efficiency for 3S Battery at vices integrate low-loss power switches and provide high 15V /12.6V /2A IN OUT OUT efficiency, low heat, and fast battery charging in a small MAX77960 solution size. The reverse buck has true load disconnect 100mA to 3.15A Programmable Input Current Limit and is protected by an adjustable output current limit. The 100mA to 3A Programmable Constant Current 2 devices are highly flexible and programmable through I C Charge configuration or autonomously through resistor configura- MAX77961 tion. 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 Switching Frequency 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. 19-100909 Rev 0 9/20MAX77960/MAX77961 25V 3A/6A USB-C Buck-Boost Charger with IN OUT Integrated FETs for 2S/3S Li-Ion Batteries Simplified Block Diagram CHGIN SYS V VBUS SYS SYSA Q Q 1 3 CSINN PGND CSINP Q Q 2 4 QBAT VPVL PVL BATT VBATT BIAS AND V AVL REFERENCE GATE DRIVER AVL VAVL 2 OPTIONAL I C COMMUNICATION JEITA THM THM SCL SCL BATSP PK+ SDA 2 SDA I C INTERFACE AND INTB INTERRUPT CHARGER AND OTG CONTROL INTB BATSN PK- OTGEN OTGEN 2/3-CELL LI-ION BATTERY DISQBAT DISQBAT ISET STBY ITO STBY OPTIONAL RESISTOR INLIM PROGRAMMABILITY STAT VSET STAT CNFG VPVL UVLO INOKB OVLO GND OCP INOKB THERMAL MONITOR THERMAL SHDN MAX77960 MAX77960 MAX77961MAX77961 www.maximintegrated.com Maxim Integrated 2 BST1 LX1 LX2 BST2