Texas Instruments bq78350-R1 Technical Reference

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49
SLUUBD3D–September 2015–Revised September 2018
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Charge Algorithm
NOTE: In BatteryStatus(), the [TCA] bit, as well as the [TDA] and [FD] bits, are also set and cleared
based on safety and permanent fail protections. In GaugingStatus(), however, these bits do
not react on the safety protections.
GaugingStatus[TC][TD][FC][FD] are the status flags based on the gauging conditions only.
These flags are set and cleared based on SOC Flag Config.
The GaugingStatus[TC][TD] flags are not the same as the BatteryStatus[TCA][TDA] flags.
The [TCA] and [TDA] flags can be set or cleared by the gauging event or by the safety or PF
events. These flags also clear if charging current is not present. The [TC] and [TD] flags,
however, only set and clear by a gauging event.
GaugingStatus[FC][FD] has the same behavior as BatteryStatus[FC][FD].
The table below summarizes the various options to set and clear the [TC] and [FC] flags in
GaugingStatus().
Flag Set Criteria Set Condition Enable
[TC]
RSOC
RelativeStateOfCharge() > = TC: Set %
RSOC Threshold
SOC Flag Config [TCSetRSOC] = 1
Valid Charge Termination
(enable by default)
When ChargingStatus[VCT] = 1 SOC Flag Config [TCSetVCT] = 1
[FC]
RSOC
RelativeStateOfCharge() > = FC: Set %
RSOC Threshold
SOC Flag Config [FCSetRSOC] = 1
Valid Charge Termination
(enable by default)
When ChargingStatus[VCT] = 1 SOC Flag Config [FCSetVCT] = 1
Flag Clear Criteria Clear Condition Enable
[TC] RSOC (enable by default)
RelativeStateOfCharge() ≤ TC: Clear %
RSOC Threshold
SOC Flag Config [TCClearRSOC] = 1
[FC] RSOC (enable by default)
RelativeStateOfCharge() ≤ FC: Clear %
RSOC Threshold
SOC Flag Config [FCClearRSOC] = 1
The tables below summarizes the various options to set and clear the [TD] and [FD] flags in both
BatteryStatus() and GaugingStatus().
Flag Set Criteria Set Condition Enable
[TD] RSOC (enable by default)
RelativeStateOfCharge() < = TD: Set %
RSOC Threshold
SOC Flag Config [TDSetRSOC] = 1
[FD] RSOC (enable by default)
RelativeStateOfCharge() < = FD: Set %
RSOC Threshold
SOC Flag Config [FDSetRSOC] = 1
Flag Clear Criteria Clear Condition Enable
[TD] RSOC (enable by default)
RelativeStateOfCharge() ≥ TD: Clear %
RSOC Threshold
SOC Flag Config [TDClearRSOC] = 1
[FD] RSOC (enable by default)
RelativeStateOfCharge() ≥ FD: Clear %
RSOC Threshold
SOC Flag Config [FDClearRSOC] = 1
The SOC configuration is stored in the following data flash.
Table 5-1. SOC FLAG Config
Class Subclass Name Format
Size in
Bytes
Min Max Default Unit
Settings Configuration
SOC Flag
Config
Hex 2 0x0000 0xFFFF 0x02FB

Texas Instruments bq78350-R1 Specifications

General

Brand	Texas Instruments
Model	bq78350-R1
Category	Controller
Language	English