The MP2669 is a highly integrated, switch-mode, battery charge and system power-path management device designed for a single-cell Li-ion or Li-polymer battery for use in a wide range of portable applications. The IC has different operating modes (charge mode, boost mode, and sleep mode) to allow for management of the system and battery power based on the state of the input and output. When an input power is present, the device operates in charge mode. The MP2669 detects the adaptor’s type and sets the input current limit. Fast charge (up to 12V) is supported. The device detects the battery voltage automatically and charges the battery in four phases: trickle current charge, pre-charge, constant current, and constant voltage charge. The IC has an integrated IN-to-SYS pass-through path to pass the input voltage to the system, even when charging is disabled. The path-through path has high priority over the charging path. The MP2669 manages the input power and meets the priority of the system power demand with the integrated input current and input voltage regulation function. In the absence of the input source, the MP2669 enters sleep mode to minimize the power dissipation of the battery. If the system load is at SYS, the MP2669 switches to boost mode to power SYS from the battery. When working with the interface IC, the MP2669 can support QC3.0 with output short protection. With the I2C interface, the IC can flexibly program the charging and boosting parameters, providing the operation status. To guarantee safe operation, the IC limits the die temperature to a preset value 120°C (default). The IC also provides other safety features, including input over-voltage protection (OVP), battery OVP, thermal shutdown, and battery temperature monitoring.
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