The RT9524L is a fully integrated single cell Li-ion
battery charger IC ideal for portable applications. The
RT9524L optimizes the charging task by using a control
algorithm including pre-charge mode, fast charge mode
and constant voltage mode. the input voltage range of the
VIN pin can be as high as 28V. When the input voltage
exceeds the OVP threshold, it will turn off the charging
MOSFET to avoid overheating of the chip.
In RT9524L, the maximum charging current can be
programmed with an external resistor. For USB application,
the user can set the current to 100mA/500mA through
the EN/SET pin. For the factory mode, the RT9524L can
allow 4.16V/2.3A power pass through to support system
operation. It also provides a 50mA LDO to support the
power of peripheral circuit. The internal thermal feedback
circuit regulates the die temperature to optimize the
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