Texas Instruments bq78350-R1

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29
SLUUBD3D–September 2015–Revised September 2018
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Protections
3.7.2 Overtemperature in Discharge Protection
The device has an overtemperature protection for cells in DISCHARGE state (that is, non-charging state
with BatteryStatus[DSG] = 1).
Status Condition Action
Normal
Cell Temperature in Temperatures() <
OTD:Threshold OR charging
SafetyAlert()[OTD] = 0
Alert
Cell Temperature in Temperatures() ≥
OTD:Threshold AND not charging (that is,
BatteryStatus[DSG] = 1)
SafetyAlert()[OTD] = 1
Trip
Cell Temperature in Temperatures() ≥
OTD:Threshold AND not charging (that is,
BatteryStatus[DSG] = 1) for OTD:Delay
duration
SafetyAlert()[OTD] = 0
SafetyStatus()[OTD] = 1
BatteryStatus()[OTA] = 1
Discharging is disabled AND OperationStatus()[XDSG] =
1 if FET Options[OTFET] = 1.
Recovery
SafetyStatus()[OTD] AND Cell Temperature in
Temperatures() ≤ OTD:Recovery
SafetyStatus()[OTD] = 0
BatteryStatus()[OTA] = 0
Discharging is allowed AND OperationStatus()[XDSG] =
0 if FET Options[OTFET] = 1.
Class Subclass Name Type Min Max Default Unit
Protections OTD Threshold I2 –400 1500 600 0.1°C
Protections OTD Delay U1 0 255 2 s
Protections OTD Recovery I2 –400 1500 550 0.1°C
3.7.3 Undertemperature in Charge Protection
The device has an undertemperature protection for cells in charge direction (that is, with
BatteryStatus[DSG] = 0).
Status Condition Action
Normal Temperature() > UTC:Threshold OR not charging SafetyAlert()[UTC] = 0
Alert Temperature() ≤ UTC:Threshold AND charging SafetyAlert()[UTC] = 1
Trip
Temperature() ≤ UTC:Threshold AND
Charging for UTC:Delay duration
SafetyAlert()[UTC] = 0
SafetyStatus()[UTC] = 1
OperationStatus()[XCHG] = 1
Recovery
SafetyStatus()[UTC] AND
Temperature() ≥ UTC:Recovery
SafetyStatus()[UTC] = 0
OperationStatus()[XCHG] = 0
Class Subclass Name Type Min Max Default Unit
Protections UTC Threshold I2 –400 1500 0 0.1°C
Protections UTC Delay U1 0 255 2 s
Protections UTC Recovery I2 –400 1500 50 0.1°C
3.7.4 Undertemperature in Discharge Protection
The device has an undertemperature protection for cells in DISCHARGE state (that is, non-charging state
with BatteryStatus[DSG] = 1).
Status Condition Action
Normal Temperature() > UTD:Threshold OR charging SafetyAlert()[UTD] = 0
Alert
Temperature() ≤ UTD:Threshold AND
Not charging (that is, BatteryStatus[DSG] = 1)
SafetyAlert()[UTD] = 1
Trip
Temperature() ≤ UTD:Threshold AND
Not charging (that is, BatteryStatus[DSG] = 1) for
UTD:Delay duration
SafetyAlert()[UTD] = 0
SafetyStatus()[UTD] = 1
OperationStatus()[XDSG] = 1