Texas Instruments bq34210-Q1, Техническое справочное руководство

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Additional Data Memory Parameter Descriptions
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44 SLUUBE8 – September 2018
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Functional Description
2.9.41 Charge Inhibit Temp High
The bq34210-Q1 device does not allow the battery pack to charge if Temperature() is above
Charge Inhibit Temp High . The [CHGINH] bit is set in the BatteryStatus() . The default value is 45°C.
Charging is allowed once the temperature is below Charge Inhibit Temp High plus Temp Hys value. The
[CHGINH] bit is reset in the BatteryStatus() register.
2.9.42 Temp Hys
The bq34210-Q1 device has a temperature hysteresis for both Charge Inhibit Temp High and
Charge Inhibit Temp Low conditions to prevent continuous charger ON/OFF behavior. The default value
is 5°C. Charging is allowed once the temperature is below Charge Inhibit Temp High plus Temp Hys or
above Charge Inhibit Temp Low plus Temp Hys value.
2.9.43 Charging and Charge Termination
The bq34210-Q1 does not directly control charging and charge termination, but its registers and
commands create an interface to work with the charging system. For proper bq34210-Q1 operation, the
battery cell charging voltage should be specified by the user in the 3
Charge Voltage T#-T# registers.
These parameters should be set to the recommended charging voltage battery.
The bq34210-Q1 device includes multiple algorithms for charging and charge termination, including
JEITA-based charging, negative temperature-based charging, and negative delta voltage-based charging.
The ChargingVoltage() and ChargingCurrent() will be selected by the bq34210-Q1 device following the
JEITA method, depending on the [JEITA] bit setting. If this bit is set, the voltage and current are selected
based on the settings in Charge Voltage T#-T# , Charge Current T#-T# , and JEITA T# Temp . The
JEITA T# Temp provides temperature boundaries for the temperature category.
If Temperature() < JEITA T1 Temp , then charging is inhibited,
ChargingVoltage() = 0,
ChargingCurrent() = 0.
If JEITA T1 Temp ≤ Temperature() ≤ JEITA T2 Temp , then
ChargingVoltage() = Charge Voltage T1 – T2 ,
ChargingCurrent() = Charge Current T1 – T2 .
If JEITA T2 Temp < Temperature()
≤
JEITA T3 Temp , then
ChargingVoltage() = Charge Voltage T2 – T3 ,
ChargingCurrent() = Charge Current T2 – T3 .
If JEITA T3 Temp < Temperature() ≤ JEITA T4 Temp , then
ChargingVoltage() = Charge Voltage T3 – T4 ,
ChargingCurrent() = Charge Current T3 – T4 .
If JEITA T4 Temp < Temperature() , then charging is inhibited,
ChargingVoltage() = 0,
ChargingCurrent() = 0.
If the [JEITA] bit is reset, then operation is as follows:
If Temperature() < JEITA T1 Temp , then charging is inhibited,
ChargingVoltage() = 0,
ChargingCurrent() = 0.
If JEITA T1 Temp ≤ Temperature() ≤ JEITA T4 Temp , then
ChargingVoltage() = Charge Voltage T2 – T3 ,
ChargingCurrent() = Charge Current T2 – T3 .
If JEITA T4 Temp < Temperature() , then charging is inhibited,
ChargingVoltage() = 0,
ChargingCurrent() = 0.