Texas Instruments bq78350-R1 Technical Reference

Safety Overcurrent in Discharge Permanent Fail www.ti.com
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SLUUBD3D–September 2015–Revised September 2018
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Permanent Fail
Status Condition Action
Normal Current() < SOCC:Threshold PFAlert()[SOCC] = 0
Alert Current() ≥ SOCC:Threshold
PFAlert()[SOCC] = 1
BatteryStatus()[TCA] = 1
BatteryStatus()[OCA] = 1
Trip Current() ≥ SOCC:Threshold for SOCC:Delay duration
PFAlert()[SOCC] = 0
PFStatus()[SOCC] = 1
BatteryStatus()[TCA] = 1
BatteryStatus()[TDA] =1
BatteryStatus()[OCA] = 1
4.7 Safety Overcurrent in Discharge Permanent Fail
The device can permanently disable the battery in the case of severe overcurrent in DISCHARGE or
RELAX state.
Status Condition Action
Normal Current() > SOCD:Threshold PFAlert()[SOCD] = 0
Alert Current() ≤ SOCD:Threshold
PFAlert()[SOCD] = 1
BatteryStatus()[TDA] = 1
Trip Current() ≤ SOCD:Threshold for SOCD:Delay duration
PFAlert()[SOCD] = 0
PFStatus()[SOCD] = 1
BatteryStatus()[TCA] = 1
BatteryStatus()[TDA] =1
4.8 Safety Overtemperature Cell Permanent Fail
The device can permanently disable the battery pack in case of severe overtemperature of the cells
detected using the external TS1...3 temperature sensor(s), which are configured to report Temperature().
The Temperature() measurement configuration is controlled by setting the corresponding flag in DA
Configuration.
Status Condition Action
Normal Cell Temperature in DAStatus2() < SOT:Threshold PFAlert()[SOT] = 0
Alert Cell Temperature in DAStatus2() ≥ SOT:Threshold
PFAlert()[SOT] = 1
BatteryStatus()[OTA] = 1
Trip
Cell Temperature in DAStatus2() continuous ≥
SOT:Threshold for SOT:Delay duration
PFAlert()[SOT] = 0
PFStatus()[SOT] = 1
BatteryStatus()[OTA] = 1
BatteryStatus()[TCA] = 1
BatteryStatus()[TDA] = 1
Class Subclass Name Type Min Max Default Unit
Permanent Fail SOT Threshold I2 –400 1500 650 0.1°C
Permanent Fail SOT Delay U1 0 255 5 s
4.9 Safety Overtemperature FET (SOTF) Permanent Fail
The device can disable the battery pack permanently in case of severe overtemperature on the power
FET. The temperature sensor(s) can be configured to report as FET Temperature in DAStatus2() by
setting the corresponding flags in Temperature Mode and DA Configuration[FTEMP].
Status Condition Action
Normal FET Temperature in DAStatus2() < SOTF:Threshold PFAlert()[SOTF] = 0
Alert FET Temperature in DAStatus2() ≥ SOTF:Threshold
PFAlert()[SOTF] = 1
BatteryStatus()[OTA] = 1

Texas Instruments bq78350-R1 Specifications

General

Brand	Texas Instruments
Model	bq78350-R1
Category	Controller
Language	English