Analog Devices MAX77972 Product Info

The MAX77972 is an autonomous integrated FET charger with integrated fuel gauge, Universal Serial Bus (USB) Type-C and BC1.2 detection. The MAX77972 supports 4.5V to 13.7V inputs and up to 3.15A of charging current. Charge current and voltage are I²C and pin-configurable using resistors. The IC supports USB On-The-Go (OTG) reverse boost and includes a Smart Power Selector™ (SPS), which is best for using limited adapter and battery power.

The fuel gauge uses the ModelGauge™ m5 algorithm, which provides industry-leading accuracy by combining the short-term accuracy and linearity of a coulomb counter with the long-term stability of a voltage-based fuel gauge. ModelGauge m5 automatically compensates for cell aging, temperature, and discharge rate and provides accurate state-of-charge (SOC) over a wide range of operating conditions.

Charging is coordinated with the fuel gauge to provide 9-temperature-region JEITA charge control as well as step-charging. Other protection features include junction thermal regulation, over/under voltage protection, and short circuit protection.

The USB Type-C Configuration Channel (CC) detection pins on the MAX77972 enable automatic USB Type-C power source detection and input current limit configuration. To support a variety of legacy USB types as well as proprietary adapters, the IC also integrates BC1.2 detection using the D+ and D- pins. The IC runs the CC pin and BC1.2 detection automatically as soon as a USB plug is inserted without any software control.

The IC is available in a lead-free 3.208mm x 3.258mm 36-bump 0.5mm pitch Wafer-level packaging (WLP) package.