Texas Instruments bq78350-R1

www.ti.com Voltage Imbalance at Rest Permanent Fail
39
SLUUBD3D–September 2015–Revised September 2018
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Permanent Fail
Status Condition Action
Trip
FET Temperature in DAStatus2() continuous ≥ SOTF:Threshold for
SOTF:Delay duration
PFAlert()[SOTF] = 0
PFStatus()[SOTF] = 1
BatteryStatus()[OTA] = 1
4.10 Voltage Imbalance at Rest Permanent Fail
The device can permanently disable the battery pack in case of a voltage difference between the cells in a
stack while at rest.
Status Condition Action
Normal
CellVoltage1..15() < VIMR:Check Voltage OR
|Current()| > VIMR:Check Current OR
Δ(CellVoltage1..15()) < VIMR:Delta Threshold
PFAlert()[VIMR] = 0
Alert
Any(CellVoltage1..15()) ≥ VIMR:Check Voltage AND
|Current()| < VIMR:Check Current for VIMR:Duration AND
Δ(CellVoltage1..15()) ≥ VIMR:Delta Threshold
PFAlert()[VIMR] = 1
Trip
Any(CellVoltage1..15()) ≥ VIMR:Check Voltage AND
|Current()| < VIMR:Check Current for VIMR:Duration AND
Δ(CellVoltage1..15()) ≥ VIMR:Delta Threshold for VIMR:Delta Delay
PFAlert()[VIMR] = 0
PFStatus()[VIMR] = 1
BatteryStatus()[TCA] = 1
BatteryStatus()[TDA] = 1
Class Subclass Name Type Min Max Default Unit
Permanent Fail VIMR Check Voltage I2 0 5000 5000 mV
Permanent Fail VIMR Check Current I2 0 32767 10 mA
Permanent Fail VIMR Delta Threshold I2 0 5000 500 mV
Permanent Fail VIMR Delta Delay U1 0 255 5 s
Permanent Fail VIMR Duration U2 0 65535 100 s
4.11 Charge FET Permanent Fail
The device can permanently disable the battery pack in case the charge FET is not working properly.
Status Condition Action
Normal CHG FET off AND Current() < CFET:OFF Threshold PFAlert()[CFETF] = 0
Alert CHG FET off AND Current() ≥ CFET:OFF Threshold PFAlert()[CFETF] = 1
Trip
CHG FET off AND Current() continuously ≥ CFET:OFF
Threshold for CFET:OFF Delay duration
PFAlert()[CFETF] = 0
PFStatus()[CFETF] = 1
BatteryStatus()[TCA] = 1
BatteryStatus()[TDA] = 1
Class Subclass Name Type Min Max Default Unit
Permanent Fail CFETF OFF Threshold I2 0 500 5 mA
Permanent Fail CFETF Delay U1 0 255 5 s
4.12 Discharge FET Permanent Fail
The device can permanently disable the battery pack in case the discharge FET is not working properly.