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| BQ25120A Datasheet, PDF (13/67 Pages) Texas Instruments – Low IQ Highly Integrated Battery Charge Management Solution for Wearables and IoT | |||
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www.ti.com
Insert
Battery
VIN
Apply
VIN
Typical Start-Up Timing and Operation
BAT supplies SYS
when VIN removed
bq25120A
SLUSD08 â MAY 2017
Remove
Battery
PMID
PG
VIN > UVLO
SW
SYS
CD
IBAT
VBAT
INT
After delay of several ms,
switching starts and SYS
starts to rise
Charging
enabled
0mA
Charging
disabled
VBAT>VBUVLO
VBAT
rises
IBAT=ICHRG
Shows
Charge
Status
Charge
Current
Taper
VBAT = VBATREG
IBAT = ITERM No SYS Load
VBAT =
VBATREG - VRCHG
SYS Load Applied
VISET
BAT IQ
<3uA max
nA of leakage with VIN present
<3uA max
<4uA max
<5uA max
<4uA max
Conditions: PGB_MRS = 0, TE = 1, SW_LDO = 1, VINDPM_ON = 0, PG and INT pulled up to SYS, EN_INT = 1
Figure 1. Typical Start-Up Timing and Operation
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: bq25120A
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