BQ25120_16 Datasheet, PDF (3/68 Pages) Texas Instruments – Highly Integrated Battery Charge Management Solution

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BQ25120, BQ25121
SLUSBZ9B – AUGUST 2015 – REVISED MAY 2016
5 Description (continued)
The battery is charged using a standard Li-Ion charge profile with three phases: precharge, constant current and
constant voltage. A voltage-based JEITA compatible battery pack thermistor monitoring input (TS) is included
that monitors battery temperature and automatically changes charge parameters to prevent the battery from
charging outside of its safe temperature range. The charger is optimized for 5-V USB input, with 20-V tolerance
to withstand line transients. The buck converter is run from the input or battery. When in battery only mode, the
device can run from a battery up to 4.65 V.
A configurable load switch allows system optimization by disconnecting infrequently used devices. The manual
reset with timer allows mutliple different configuration options for wake are reset optimization. A simple voltage
based monitor provides battery level information to the host in 2% increments from 60% to 100% of the
programmed V_(BATREG).
6 Device Comparison Table
PART NUMBER
BQ25120
BQ25121
VINDPM
Enabled
Enabled
DEFAULT SYS DEFAULT LDO
OUTPUT
OUTPUT
1.8 V
2.5 V
Load Switch
Load Switch
DEFAULT
VBERG
4.2 V
4.2 V
DEFAULT
CHARGE
CURRENT
10 mA
10 mA
DEFAULT
TERMINATION
CURRENT
2 mA
2 mA
DEFAULT SHIP
MODE
Off
Off
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