Texas Instruments bq78350-R1 Technical Reference

Open Thermistor Permanent Fail (TS1, TS2, TS3) www.ti.com
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SLUUBD3D–September 2015–Revised September 2018
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Permanent Fail
Status Condition Action
Normal Data flash write ok —
Trip Data flash write not successful
PFStatus()[DFW] = 1
BatteryStatus()[TCA] = 1
BatteryStatus()[TDA] = 1
4.19 Open Thermistor Permanent Fail (TS1, TS2, TS3)
The device can permanently disable the battery if it detects an open thermistor on TS1, TS2, or TS3. This
feature is only available when the bq78350-R1 is used in conjunction with the bq76930 or the bq76940.
Status Condition Action
Normal TS1 Temperature > Open Thermistor:Threshold PFAlert()[TS1] = 0
Normal TS2 Temperature > Open Thermistor:Threshold PFAlert()[TS2] = 0
Normal TS3 Temperature > Open Thermistor:Threshold PFAlert()[TS3] = 0
Alert TS1 Temperature ≤ Open Thermistor:Threshold PFAlert()[TS1] = 1
Alert TS2 Temperature ≤ Open Thermistor:Threshold PFAlert()[TS2] = 1
Alert TS3 Temperature ≤ Open Thermistor:Threshold PFAlert()[TS3] = 1
Trip
TS1 Temperature ≤ Open Thermistor:Threshold for Open
Thermistor:Delay duration
PFAlert()[TS1] = 0
PFStatus()[TS1] = 1
BatteryStatus()[TCA] = 1
BatteryStatus()[TDA] = 1
Trip
TS2 Temperature ≤ Open Thermistor:Threshold for Open
Thermistor:Delay duration
PFAlert()[TS2] = 0
PFStatus()[TS2] = 1
BatteryStatus()[TCA] = 1
BatteryStatus()[TDA] = 1
Trip
TS3 Temperature ≤ Open Thermistor:Threshold for Open
Thermistor:Delay duration
PFAlert()[TS3] = 0
PFStatus()[TS3] = 1
BatteryStatus()[TCA] = 1
BatteryStatus()[TDA] = 1
Class Subclass Name Type Min Max Default Unit
Permanent Fail Open Thermistor Threshold I2 0 32767 2232 0.1°K
Permanent Fail Open Thermistor Delay U1 0 255 5 s
4.20 PF Status Snapshot Data Flash
4.20.1 Device Status Data
Class Subclass Name Type Min Max Default Description
PF Status
Device Status
Data
Safety Alert A H1 0x00 0xFF 0 Accumulated safety flags since PF event
PF Status
Device Status
Data
Safety Status A H1 0x00 0xFF 0 Accumulated safety flags since PF event
PF Status
Device Status
Data
Safety Alert B H1 0x00 0xFF 0 Accumulated safety flags since PF event
PF Status
Device Status
Data
Safety Status B H1 0x00 0xFF 0 Accumulated safety flags since PF event
PF Status
Device Status
Data
Safety Alert C H1 0x00 0xFF 0 Accumulated safety flags since PF event
PF Status
Device Status
Data
Safety Status C H1 0x00 0xFF 0 Accumulated safety flags since PF event
PF Status
Device Status
Data
Safety Alert D H1 0x00 0xFF 0 Accumulated safety flags since PF event
PF Status
Device Status
Data
Safety Status D H1 0x00 0xFF 0 Accumulated safety flags since PF event

Texas Instruments bq78350-R1 Specifications

General

Brand	Texas Instruments
Model	bq78350-R1
Category	Controller
Language	English