EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX77975/MAX77976 19VIN, 3.5/5.5A 1-Cell Li+ Battery Charger with Smart Power Selector and OTG for USBC PD General Description Benefits and Features The MAX77975/MAX77976 is a high-performance high-in- High-Efficiency Single-Cell Switching Charger TM put 3.5/5.5A fast charger with Smart Power Selector . Up to 5.5A Charging with MAX77976 The IC can operate as a reverse boost without an addition- 91.2% Buck Efficiency at 4A, 12V Input al inductor, allowing the battery to share its power through 90.5% Charging Efficiency at 3.5A, 9V Input the charging port and is voltage programmable from 5V to Optimized for High Voltage Input Operation 12V. The device features fully integrated low-loss power Accelerate Charge Time by Monitoring Kelvin switches to provide small solution size and high-efficiency, Sensing Battery Voltage even at high input voltage and high charging current. Its Up to 3.2A Input Current Limit with AICL high switching frequency allows the use of a smaller sized +28V Absolute Maximum Input Voltage Rating inductor. The IC features true load disconnection in re- 4.7V to 19V Input Operating Voltage Range verse boost mode and has an adjustable output current Reverse Boost with Programmable Output Voltage protection limit. The device is highly flexible and program- Options up to 12V 2 mable through I C configuration. Up to 18W for MAX77976 The battery charger includes a Smart Power Selector to Up to 12W for MAX77975 accommodate a wide range of battery sizes and system Integrated Battery True-Disconnect FET loads. The Smart Power Selector allows the system to R = 7.7m DSON start-up gracefully as soon as an input source is available, Discharge Current up to 10A even when the battery is deeply discharged (dead battery) Support Shipping Mode and Low Battery Leakage or missing. It can be configured so that when power is ap- Current plied to the charger input, the battery charging can auto- 1.3MHz/2.6MHz Switching Frequency with 1H/ matically start. 0.47H Inductor Disconnect Input (DISQBAT) Applications Safety Gaming Devices Battery Temperature Sensing and Charge Safety VR Applications Timer mPOS JEITA Guideline Compliant Tablet PCs Thermal Regulation and Thermal Shutdown System Voltage OVLO/UVLO Charge Status Output for LED Push-Button Input for Exiting from Ship Mode External Discharge FET Enable Output Dedicated Input for Suspend Mode (SUSPND) 2 I C Interface 4mm x 4mm FC2QFN Ordering Information appears at end of data sheet. Smart Power Selector is a trademark of Maxim Integrated Products, Inc. USB Type-C is a registered trademark of USB Implementers Forum. PowerPath is a trademark of Linear Technology Corporation. 19-100876 Rev 2 7/21BODY- SWITCH MAX77975/MAX77976 19VIN, 3.5/5.5A 1-Cell Li+ Battery Charger with Smart Power Selector and OTG for USBC PD Simplified Block Diagram MAX77975/MAX77976MAX77975/MAX77976 CHGIN BYP BST LX SYS PVDD PGND CHARGER CONTROL SYS VDD BATT BATSP BATSN AGND THM BATTERY T PVDD IRQB SUSPND 2 SCL LOGIC / I C DISQBAT SDL EXTSM SYS VIO QBEXT DGND STAT www.maximintegrated.com Maxim Integrated 2