BQ25120_15 Datasheet, PDF (30/68 Pages) Texas Instruments – bq25120 700-nA Low IQ Highly Integrated Battery Charge Management Solution for Wearables and IoT

BQ25120
SLUSBZ9A – AUGUST 2015 – REVISED AUGUST 2015
www.ti.com
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 16. State Diagram
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