MP2700GC

The MP2700 is a linear charger for 1-cell to 2-cell Li-ion, Li-polymer, and LiFePO4 batteries, as well as 2-cell to 6-cell NiMH batteries. The device can sustain a voltage up to 26V. The MP2700 measures the battery voltage (VBATT) and automatically charges the battery in four phases: trickle charge, pre-charge, constant-current (CC) fast charge, and constant-voltage charge. When the battery is charged to full voltage, the charge current decreases slowly due to the internal battery resistance. The MP2700 automatically terminates the charging when the charge current drops below the termination current (ITERM) threshold. After termination, the MP2700 can recharge the battery automatically once VBATT drops below the recharge threshold. Throughout the entire charge cycle, the MP2700 always monitors the chip junction temperature (TJ). When TJ exceeds a set threshold, an internal temperature regulation loop helps reduce the charge current to prevent TJ from rising further. The MP2700 provides a dedicated ISET pin to set the constant-current fast charge current (ICC) by connecting a resistor between ISET and ground. The MP2700 also provides a USBM pin to set the input current limit (IIN_LIM) prior to setting ICC. In addition, the device also has a minimum input voltage limit (VIN_LIM) to reduce ICC when the input power is overloaded. The MP2700 has robust protection features, including input over-voltage protection (OVP), battery OVP, a charge safety timer, and battery temperature protection compliant with the JEITA standard. The MP2700 provides an open-drain pin to indicate charge status. The CHG pin indicates several states of charging, including charging, termination, and fault events. The MP2700 also has flexible one-time programmable (OTP) memory to configure a variety of charge parameters. The MP2700 is available in a WLCSP-8 (1.05mmx1.6mm) package.