Texas Instruments bq78350-R1 Technical Reference

www.ti.com Fast Charge Timeout Protection
31
SLUUBD3D–September 2015–Revised September 2018
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Protections
3.9 Fast Charge Timeout Protection
The device can measure the charge time and stop charging if it exceeds the adjustable period.
Status Condition Action
Enable Current() > CTO:Charge Threshold
Start CTO timer
SafetyAlert()[CTOS] = 0
Suspend or Recovery Current() < CTO:Suspend Threshold
Stop CTO timer
SafetyAlert()[CTOS] = 1
Trip CTO time > CTO:Delay
Stop CTO timer
SafetyStatus()[CTO] = 1
BatteryStatus()[TCA] = 1
Charging is not allowed.
Reset
SafetyStatus()[CTO] = 1 AND
(Discharge by an amount of CTO:Reset)
Stop and reset CTO timer
SafetyAlert()[CTOS] = 0
SafetyStatus()[CTO] = 0
BatteryStatus()[TCA] = 0
Charging is allowed.
Class Subclass Name Type Min Max Default Unit
Protections CTO Charge Threshold I2 –32768 32767 2500 mA
Protections CTO Suspend Threshold I2 –32768 32767 2000 mA
Protections CTO Delay U2 0 65535 54000 s
Protections CTO Reset I2 –32768 32767 2 mAh
3.10 Overcharge Protection
The device can prevent continuing charging if the pack is charged in excess over FullChargeCapacity().
While RemainingCapacity() never reports a value higher than FullChargeCapacity() in the device registers,
it is tracked to higher values internally to protect against overcharging.
Status Condition Action
Normal RemainingCapacity() < FullChargeCapacity() SafetyAlert()[OC] = 0
Alert RemainingCapacity() ≥ FullChargeCapacity() SafetyAlert()[OC] = 1
Trip
RemainingCapacity() ≥ FullChargeCapacity() +
OC:Threshold
SafetyAlert()[OC] = 0
SafetyStatus()[OC] = 1
BatteryStatus()[TCA] = 1, [OCA] = 1 if the device is in
CHARGE state (that is, BatteryStatus[DSG] = 0).
OperationStatus()[XCHG] = 1
Charging is not allowed.
Recovery
SafetyStatus()[OC] = 1 AND
continuous discharge of Recovery OR
RemainingStateOfCharge() < OC:RSOC
Recovery
SafetyStatus()[OC] = 0
BatteryStatus()[TCA] = 0, [OCA] = 0
OperationStatus()[XCHG] = 0
Charging is allowed.
Class Subclass Name Type Min Max Default Unit
Protections OC Threshold I2 –32768 32767 300 mAh
Protections OC Recovery I2 –32768 32767 2 mAh
Protections OC RSOC Recovery U1 0% 100% 90%

Texas Instruments bq78350-R1 Specifications

General

Brand	Texas Instruments
Model	bq78350-R1
Category	Controller
Language	English