BQ25120A Datasheet, PDF (32/67 Pages) Texas Instruments – Low IQ Highly Integrated Battery Charge Management Solution for Wearables and IoT

bq25120A
SLUSD08 – MAY 2017
www.ti.com
Table 11. Fault and Status Condition Responses (continued)
FAULT or STATUS
ACTIONS
VINDPM
TS_FAULT COLD
or HOT
TS_FAULT COOL
TS_FAULT WARM
Update VINDPM_STAT,
Update STAT to fault, interrupt
on INT
Update TS_FAULT to COLD
OR HOT, Update STAT to
fault, interrupt on INT
Update TS_FAULT to COOL,
Update STAT to fault, interrupt
on INT
Update TS_FAULT to WARM,
Update STAT to fault, interrupt
on INT
Charge Done
Update STAT to Charge Done,
interrupt on INT
CHARGER
BEHAVIOR
Enabled, input
current reduced
Disabled
Reduce ICHG to ½
Reduce VBATREG
by 140 mV
Disabled, monitor
for VBAT falling
below VRCHG
SYS BEHAVIOR
Enabled (if
enabled)
Enabled (if
enabled)
Enabled (if
enabled)
Enabled (if
enabled)
Enabled (if
enabled)
LS/LDO
BEHAVIOR
Enabled (if
enabled)
Enabled (if
enabled)
Enabled (if
enabled)
Enabled (if
enabled)
Enabled (if
enabled)
TS BEHAVIOR
Enabled
Enabled
Enabled
Enabled
Enabled
RESET
READY STATE
After Reset, all default OTP settings
are used in this state.
/CE
!/CE
yVIN_OV
yVIN_UV
yOVER_TEMP
yBAT_SHORT
yBAT_OVP
!FAULT|/CE
/CE
FAULT
A failure occurred. The fault event
must be cleared before going to the
previous state.
yTIMER
yVIN_OV
yOVER_TEMP
yTS_FAULT (HOT OR COLD)
!FAULT|_!/CE
yBAT_OVP
yVIN_OV
!FAULT|_{!/CE & DONE}
yTS_FAULT (HOT OR COLD)
yVBAT>VBAT_UVLO
yVIN<VBAT+VSLP
yCD9
HZ_MODE
yCD;|VIN>VUVLO
HIGH_Z
Lowest quiescent current state. SYS
is powered by BAT, MR input is active,
and the LSCTRL input is active.
HZ_MODE
yCD9
yVBAT>VBAT_UVLO
yVIN<VBAT+VSLP
yCD;|VIN<VUVLO
CHARGING
The system charges the battery using
the programmed register settings,
default OTP settings, or the externally
programmed settings. Watchdog and
safety timers are active in this state,
unless disabled in OTP or register
settings.
yCHARGING DONE|_TE
yVBAT;
!TE
DONE
The termination requirements have
been met. VBAT is monitored and
Charging resumes when conditions
are met.
ACTIVE BATTERY
The device is powered from BAT, all
outputs and interfaces are active.
yVIN>VUVLO
yVIN>VBAT+VSLP
Comments about naming convention:
^/ ^ }Π^HZ_DK ^ -> Register name: event caused by user / configuration
^!^ -> Not
^y^ -> Event caused by external influence
^Event|_condition^ -> describes the event with a specific condition
Figure 19. State Diagram
32
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