BQ25120_15 Datasheet, PDF (3/68 Pages) Texas Instruments – bq25120 700-nA Low IQ Highly Integrated Battery Charge Management Solution for Wearables and IoT

www.ti.com
BQ25120
SLUSBZ9A – AUGUST 2015 – REVISED AUGUST 2015
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
VINDPM
Enabled
DEFAULT SYS DEFAULT LDO
OUTPUT
OUTPUT
1.8 V
Load Switch
DEFAULT
VBERG
4.2 V
DEFAULT
CHARGE
CURRENT
10 mA
DEFAULT
TERMINATION
CURRENT
2 mA
DEFAULT SHIP
MODE
Off
Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: BQ25120
Submit Documentation Feedback
3