1 Features

1• Charging

– 1% Charge Voltage Accuracy

– 10% Charge Current Accuracy low–

Supports Applications for Very Low Charge

Currents - 10 mA to 250 mA

– Supports minimum 1-mA Charge Termination

Current

– Ultra Low Battery Output Leakage Current -

Maximum 75 nA

– Adjustable Termination and Precharge

Threshold

– High voltage Chemistry Support: 4.35 V with

bq25100H/01H, 4.30 V with bq25100A

• Protection

– 30-V Input Rating; with 6.5-V Input

Overvoltage Protection

– Input Voltage Dynamic Power Management

– 125°C Thermal Regulation; 150°C Thermal

Shutdown Protection

– OUT Short-Circuit Protection and ISET Short

Detection

– Operation over JEITA Range via Battery

NTC – 1/2 Fast-Charge-Current at Cold, 4.06

V (bq25100/01) or 4.2 V (bq25100H/01H) at

Hot

– Fixed 10 Hour Safety Timer

• System

– Automatic Termination and Timer Disable

Mode (TTDM) for Absent Battery Pack

– Available in Small 1.60 mm × 0.90 mm

DSBGA Package

2 Applications

• Fitness Accessories

• Smart Watches

• Bluetooth® Headsets

• Low-Power Handheld Devices

3 Description

The bq2510x series of devices are highly integrated

Li-Ion and Li-Pol linear chargers targeted at space- limited portable applications. The high input voltage

range with input overvoltage protection supports low–

cost unregulated adapters.

The bq2510x has a single power output that charges

the battery. A system load can be placed in parallel

with the battery as long as the average system load

does not keep the battery from charging fully during

the 10 hour safety timer.

The battery is charged in three phases: conditioning,

constant current and constant voltage. In all charge phases, an internal control loop monitors the IC

junction temperature and reduces the charge current

if an internal temperature threshold is exceeded.

The charger power stage and charge current sense

functions are fully integrated. The charger function

has high accuracy current and voltage regulation

loops and charge termination. The pre-charge current

and termination current threshold are programmed via an external resistor on the bq2510x. The fast

charge current value is also programmable via an

external resistor.