The MP2760 is a buck-boost charger for battery packs with 1 to 4 cells in series. It accepts a wide 4V to 22V input voltage (VIN) range to charge the battery. The battery voltage can be above or below VIN due to the buck-boost topology.
When the input is present, the MP2760 operates in charge mode. The device measures the battery voltage and charges the battery with four phases: constant current trickle charge, constant current pre-charge, constant current fast charge, and constant voltage charge. Additional features include charge termination and automatic recharge. The MP2760 integrates the input current (IIN) limit and VIN limit to avoid overloading the input power source. This is compliant with USB PD specifications.
The MP2760 provides narrow-voltage DC (NVDC) power path management. A battery FET (BATFET) controls an external N-channel MOSFET to regulate the system’s minimum voltage and provide a battery supplement function. The device can also supply a wide 3V to 21V voltage range at the IN pin when source mode is enabled. The MP2760 also has an output current (IOUT) limit up to 6A in source mode. These are compliant with USB PD specifications.
The charge and discharge parameters (e.g. IIN limit, VIN limit, charging current, battery full regulation voltage, output voltage (VOUT), and IOUT in source mode) can be configured via the I2C/SMBus interface. The MP2760 can also provide statuses and fault information through the I2C/SMBus registers.
To guarantee safe operation, the IC limits the die temperature to a configurable threshold. Other safety features include input over-voltage protection (OVP), battery OVP, system OVP, thermal shutdown, and a configurable timer to prevent prolonged charging of a dead battery.
The MP2760 is available in a TQFN-30 (4mmx5mm) package.