MP2651 Datasheet | Monolithic Power Systems

DESCRIPTION The MP2651 is a buck-boost charger IC designed for battery packs with 1 cell to 4 cells in series. The device can accept a wide 4V to 22V input voltage (VIN) range to charge the battery. The buck-boost topology allows the battery voltage to be above or below VIN. When the input is present, the MP2651 operates in charge mode. It 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. Other features include charge termination and autorecharge. The MP2651 also integrates the input current (IIN) limit and VIN limit to avoid overloading the input power source. This is pliant with the USB and PD specifications. The MP2651 can also supply a wide voltage range (4V to 21V) at the input when source mode is enabled. The device also has an IN output current limit in source mode (IIN_SRC) with high resolution in source mode. The I2C/SMBus interface can configure the charge and discharge parameters, including the IIN limit, VIN limit, charge current, battery-full regulation voltage, IN output voltage in source mode (VIN_SRC), and IIN_SRC. The MP2651 can also use the registers to provide information on statuses and faults. To guarantee safe operation, the device limits the die temperature to a configurable threshold. Other safety features include input over-voltage protection (OVP), battery OVP, CFLR OVP, thermal shutdown, and a configurable timer to prevent prolonged charging of a dead battery. The MP2651 is available in a TQFN-30 (4mmx5mm) package. FEATURES - Buck-Boost Charger for 1-Cell to 4-Cell Series Battery Packs - 4V to 22V Operation Input Voltage (VIN) - Up to 26V Sustainable Voltage, or 28V with External MOSFET - Smooth Transitions Between Buck and Boost Modes - Configurable Maximum Input Current (IIN) Limit and Minimum VIN Limit - Up to 6A Configurable Charge Current - Configurable Battery-Full Voltage Up to 4.67V/Cell...