MP2672

The MP2672 is a highly integrated, flexible switch-mode battery charger IC for Lithium-ion batteries with two cells in series. This makes it applicable for a wide range of portable applications. If an input power supply is present, the MP2672 operates in boost mode to charge the battery with two cells in series. If charging is enabled, the MP2672 automatically detects the battery voltage and charges the battery in three phases: pre-charge, constant-current charge, and constant-voltage charge. Other features include charge termination and auto-recharge. The device has a narrow voltage DC (NVDC) power structure. With a deeply discharged battery, the MP2672 regulates the system output to a minimum voltage level. This powers the system instantly while simultaneously charging the battery via the battery FET. The MP2672 also provides a cell balance function. This monitors the voltage across each cell, then equalizes the cell’s voltages if the difference between the two cells exceeds the mismatch threshold. The MP2672 has two configuration modes: standalone mode and host control mode. In standalone mode, the charging parameters can be configured via the hardware pins. In host control mode, the charging parameters can be configured via the I2C registers. Diverse and robust protections include a thermal regulation loop for decreasing the charge current in case the junction temperature exceeds the thermal loop threshold, and JEITA-compliant battery temperature protection. Other safety features include input over-voltage protection (OVP), battery OVP, thermal shutdown, battery temperature monitoring, a watchdog timer, and a configurable backup timer to prevent prolonged charging of a dead battery. The MP2672 is available in a QFN-18 (2mmx3mm) package.