BQ25120A Datasheet, PDF (17/67 Pages) Texas Instruments – Low IQ Highly Integrated Battery Charge Management Solution for Wearables and IoT

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9 Detailed Description
bq25120A
SLUSD08 – MAY 2017
9.1 Overview
The following sections describe in detail the functions provided by the BQ25120A. These include linear charger,
PWM output, configurable LS/LDO output, Push-button input, reset timer, functional modes, battery monitor, I²C
configurability and functions, and safety features.
9.2 Functional Block Diagram
PMID
IN
GND
CD
SDA
SCL
LSCTRL
ILIM
ISET
IPRETERM
PG
INT
RESET
MR
Q1/Q2
Q3
SW
D
IINLIM
VIN_DPM
PWM, LDO, and BAT FET
Control
IBATREG
LDO
Control
VSYSREG
VBATREG
G
S _Q4
S
SYS
VINLS
VSUPPLY
Hi-Z
Mode
I2C
Interface
LDO/ Load Switch
Control
Termination
Reference
LDO/ Load Switch
Host Control
Input Current Limit
Disable
Charge Current
Termination Current
1C/
0.5C
VBATREG
± 140mV
Disable
Device Control
VOVP
BATOVP
BATSHRT
Recharge
Thermal
Shutdown
+
IBAT
VIN
+
TS COLD
+
TS COOL
+
TS WARM
+
TS HOT
+
VIN
VINOVP
+
VBAT
+
VBATSHRT
+
+
VBAT
VBATOVP
VBATREG ± 0.12 V
VBAT
VBAT(SC)
G
D
Q7
Q5
LS/LDO
BAT
Reset and
Timer
TS
Copyright © 2016, Texas Instruments Incorporated
Copyright © 2017, Texas Instruments Incorporated
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