深圳市金博能电子有限公司

RT9519BGQW

Linear Single Cell Li-lon Battery Charger with Auto Power
Path Management

General Description
The RT9519B is an integrated single cell Li-ion battery
charger with Auto Power Path Management (APPM). No
external MOSFETs are required. The RT9519B enters
sleep mode when power is removed. Charging tasks are
optimized by using a control algorithm to vary the charge
rate, including pre-charge mode, fast charge mode and
constant voltage mode. For the RT9519B, the charge
current can also be programmed with an external resistor
and modified with an external GPIO. The scope that the
battery regulation voltage can be modified with an external
GPIO depends on the battery temperature. The internal
thermal feedback circuitry regulates the die temperature
to optimize the charge rate for all ambient temperatures.
The charging task will always be terminated in constant
voltage mode when the charging current reduces to the
termination current of 10% x ICHG_FAST. Other features
include under voltage protection and over voltage protection
for VIN the supply.