Status
Condition
Action
Normal,
ChargingStatus()[UT] or [LT]
= 1
Max cell voltage 1..2 <
COV:Threshold Low Temp
SafetyAlert()[COV]
= 0
Normal,
ChargingStatus()[STL] or [STH]
= 1
Max cell voltage 1..2 <
COV:Threshold Standard Temp
Normal,
ChargingStatus()[RT]
= 1
Max cell voltage 1..2 <
COV:Threshold Rec Temp
Normal,
ChargingStatus()[HT] or [OT]
= 1
Max cell voltage 1..2 <
COV:Threshold High Temp
Alert,
ChargingStatus()[UT] or [LT]
= 1
Max cell voltage 1..2 ≥
COV:Threshold Low Temp
SafetyAlert()[COV]
= 1
BatteryStatus()[TCA]
= 1
Alert,
ChargingStatus()[STL] or [STH]
= 1
Max cell voltage 1..2 ≥
COV:Threshold Standard Temp
Alert,
ChargingStatus()[RT]
= 1
Max cell voltage 1..2 ≥
COV:Threshold Rec Temp
Alert,
ChargingStatus()[HT] or [OT]
= 1
Max cell voltage 1..2 ≥
COV:Threshold High Temp
Trip,
ChargingStatus()[UT] or [LT]
= 1
Max cell voltage 1..2 ≥
COV:Threshold Low Temp
for
COV:Delay
duration
SafetyAlert()[COV]
= 0
SafetyStatus()[COV]
= 1
BatteryStatus()[TCA]
= 1
OperationStatus()[XCHG]
= 1
Trip,
ChargingStatus()[STL] or [STH]
= 1
Max cell voltage 1..2 ≥
COV:Threshold Standard Temp
for
COV:Delay
duration
Trip,
ChargingStatus()[RT]
= 1
Max cell voltage 1..2 ≥
COV:Threshold Rec Temp
for
COV:Delay
duration
Trip,
ChargingStatus()[HT] or [OT]
= 1
Max cell voltage 1..2 ≥
COV:Threshold High Temp
for
COV:Delay
duration
Recovery,
ChargingStatus()[UT] or [LT]
= 1
SafetyStatus()[COV]
= 1 AND Max cell voltage 1..2 ≤
COV:Recovery Low Temp
SafetyStatus()[COV]
= 0
BatteryStatus()[TCA]
= 0
OperationStatus()[XCHG]
= 0
Recovery,
ChargingStatus()[STL] or [STH]
= 1
SafetyStatus()[COV]
= 1 AND Max cell voltage 1..2 ≤
COV:RecoveryStandard Temp
Recovery,
ChargingStatus()[RT]
= 1
SafetyStatus()[COV]
= 1 AND Max cell voltage 1..2 ≤
COV:Recovery Rec Temp
Recovery,
ChargingStatus()[HT] or [OT]
= 1
SafetyStatus()[COV]
= 1 AND Max cell voltage 1..2 ≤
COV:Recovery High Temp
2.4 Overcurrent in Charge Protection
To protect cells from damage due to unsafe charge currents, the device can detect overcurrent events and
disable the appropriate FET.
Status
Condition
Action
Normal
Current()
<
OCC:Threshold
SafetyAlert()[OCC]
= 0
Alert
Current()
≥
OCC:Threshold
SafetyAlert()[OCC]
= 1
Trip
Current()
continuous ≥
OCC:Threshold
for
OCC:Delay
duration
SafetyAlert()[OCC1]
= 0
SafetyStatus()[OCC]
= 1
BatteryStatus()[TCA]
= 1
OperationStatus()[XCHG]
= 1
Recovery
[SafetyStatus()[OCC]
= 1 AND
Current()
continuous ≤
OCC:Recovery Threshold
for
OCC:Recovery Delay
time
SafetyStatus()[OCC]
= 0
BatteryStatus()[TCA]
= 0
OperationStatus()[XCHG]
= 0
2.5 Overcurrent in Discharge Protection
To protect cells from damage due to unsafe load currents, the device can detect overcurrent events and disable
the appropriate FET.
Protections
14
BQ28Z610-R2
Copyright © 2022 Texas Instruments Incorporated
