MP2665AGQB

The MP2665A is a highly integrated, single-cell Li-ion and Li-polymer battery charger with system power path management. It is ideal for space-constrained portable applications. The device takes input power from either an AC adapter or a USB port to supply the system load and charge the battery simultaneously. The charger features pre-charge, constant current (CC) fast charge, constant voltage (CV) regulation, charge termination, and auto-recharge. Power path management ensures that the system is continuously powered by automatically selecting the input, the battery, or both to power the system. Power path management is accomplished using a low-dropout (LDO) regulator connected from the input to the system, as well as a 100mΩ switch connected from the battery to the system. This function separates the charging current from the system load, which allows for proper charge termination and keeps the battery in full charge mode. The MP2665A provides system short-circuit protection (SCP) by limiting the current from the input to the system, as well as the current from the battery to the system. This prevents the Li-ion battery from being damaged due to excessively high currents. Battery under-voltage lockout (UVLO) protection blocks the path between the battery and the system if the battery voltage drops below the configurable UVLO threshold. This prevents the Li-ion battery from being discharged excessively. The integrated I2C interface can configure the following charging parameters: input current limit, input voltage (VIN) regulation limit, charge current, battery regulation voltage, safety timer, and battery UVLO threshold. The MP2665A is available in a QFN-12 (2.5mmx3mm) package.