1 Features

• Voltage protection:

– Overvoltage (OV): ±10mV

– Undervoltage (UV): ±20mV

• Current protection:

– Overcurrent in charge (OCC): ±1mV

– Overcurrent in discharge (OCD): ±1mV

– Short circuit in discharge (SCD): ±5mV

• Temperature protection:

– Overtemperature (OT)

• Additional features:

– Supports as low as a 1mΩ sense resistor

(RSNS)

– High-side protection

– High Vgs FET drive

– 0V charging (only BQ2980)

– CTR pin for FET override control for system

reset/shutdown

– Configure CTR for second OT protection

through an external PTC thermistor

• Current consumption:

– NORMAL mode: 4μA

– SHUTDOWN mode: 0.1μA maximum

• Package:

– 8pin X2QFN: 1.50 × 1.50 × 0.37mm

2 Applications

• Smartphones

• Tablets

• Power bank

• Wearables

3 Description

The BQ298xx family of devices, featuring integrated

charge-pump FET drivers, provides high-side primary

battery cell protection for 1-series Li-ion and Lipolymer

batteries, enabling consistent Rdson across

cell voltages. For better system thermal performance,

the BQ298xx device's accuracy enables the use of a

sense resistor as low as 1mΩ.

The CTR pin in the BQ298xx device can be

configured to override the FET driver by host control

to create a system reset or shutdown function.

Alternatively, the CTR pin can be configured to

connect an external Positive Temperature Coefficient

(PTC) thermistor for FET OT protection in addition to

the internal die temperature sensor. The BQ2980xx

devices support zero-volt (0V) charging, while the

BQ2982xx devices have this disabled.