The RT9528 is a programmable single-cell Li-ion battery charger with I2C programmable control I/F, Auto Power-Path Management IC and USB/AV Switch. For the RT9528, there is no need to use external MOSFET. The RT9528 enters sleep mode when supplies are removed. The RT9528 optimizes the charging task by using a control algorithm including pre-charge mode, fast charge mode and constant voltage mode. The RT9528 includes termination, timer, charge current and VSYS settings via a serial I2C control I/F.
The RT9528 provides protections for the battery pack, charger and input circuitry such as over current, under voltage, over voltage, thermal regulation and thermal protection. Status can be monitored via the serial port for charge state and fault conditions.
The internal thermal feedback circuitry regulates the die temperature to optimize the charge rate for all ambient temperatures.
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