The bq25898C is a highly-integrated switch-mode battery charge
management and system power path management device for single cell Li-Ion and Li-polymer battery.
The device supports high input voltage for charging. The low impedance power path optimizes
switch-mode operation efficiency, reduces battery charging time and extends battery life during
discharging phase. The I2C serial interface with charging and system settings makes the device a
truly flexible solution. The bq25898C is available in a 2.8mm x 2.5mm 42-ball DSBGA package.
The bq25898C is a highly-integrated 3-A switch-mode battery charge management device for
single cell Li-Ion and Li-polymer battery. As a tiny and cost-effective device, it can also be
configured as slave charger to provide fast charging in dual charger applications.
It features fast charging with high input voltage support for a wide range of smartphone,
tablet and portable devices. Its low impedance power path optimizes switch-mode operation
efficiency, reduces battery charging time and extends battery life during discharging phase. The
solution is highly integrated with input reverse-blocking FET (RBFET,Q1), high-side switching FET
(HSFET, Q2), low-side switching FET (LSFET, Q3), and integrated charge current sensing. It also
integrates the bootstrap diode for the high-side gate drive and battery monitor for simplified
system design. The I2C serial interface with charging and system settings makes the device a truly
The device supports a wide range of input sources, including standard USB host port, USB
charging port, and USB compliant adjustable high voltage adapter. To set the default input current
limit, the device takes the result from detection circuit in the system, such as USB PHY device.
The device is compliant with USB 2.0 and USB 3.0 power spec with input current and voltage
The default charge current is set to 0 mA (both fast charge and precharge disabled). Once
charge is enabled, the device may initiate and complete a charging cycle with software
The charger provides various safety features for battery charging and system operations,
charging safety timer and overvoltage/overcurrent protections. The thermal regulation reduces
charge current when the junction temperature exceeds 120°C (programmable). The STAT output reports
the charging status and any fault conditions. The PG output indicates if a
good power source is present. The INT immediately notifies host when fault occurs.
The device is available in a 2.80 mm x 2.50 mm 42-ball DSBGA package.
View datasheet View product folder