BQ2060A_15 Datasheet, PDF (35/61 Pages) Texas Instruments – SBS v1.1-Compliant Gas Gauge IC

bq2060A
www.ti.com
SLUS500D – OCTOBER 2001 – REVISED OCTOBER 2011
CycleCount()(0x17); [0x17]
Description: Returns the number of cycles the battery has experienced. The mAh value of each count is
determined by programming the Cycle Count Threshold value in EE 0x3c–0x3d. The bq2060A saves the cycle
count value to Cycle Count EE 0x0e–0x0f after an update to CycleCount().
Purpose: The CycleCount() function provides a means to determine the battery wear. It may be used to give
advanced warning that the battery is nearing its end of life.
SMBus Protocol: Read Word
Output:
Unsigned integer—count of total charge removed from the battery over its life.
• Units: cycle
• Range: 0 to 65,534 cycles 65,535 indicates battery has experienced 65,535 or more cycles.
• Granularity: 1 cycle
• Accuracy: absolute count
DesignCapacity() (0x18); [0x18]
Description: Returns the theoretical or nominal capacity of a new pack. The DesignCapacity() value is
expressed in either current (mAh at a C/5 discharge rate) or power, (10 mWh at a P/5 discharge rate) depending
on the setting of the BatteryMode() CAPACITY_MODE bit.
Purpose: The DesignCapacity() function is used by the SMBus host power management with
FullChargeCapacity() to determine battery wear. The power management system may present this information to
the user and also adjust its power policy as a result.
SMBus Protocol: Read Word
Output:
Unsigned integer—battery capacity in mAh or 10 mWh.
Units
Range
Granularity
Accuracy
BATTERY MODE
CAPACITY_MODE
BIT = 0
mAh
0–65,535 mAh
Not applicable
Not applicable
CAPACITY_MODE
BIT = 1
10 mWh
0–65,535 10 mWh
DesignVoltage() (0x19); [0x19]
Description: Returns the theoretical voltage of a new pack (mV). The bq2060A sets DesignVoltage() to the
value programmed in Design Voltage EE0x12–0x13.
Purpose: The DesignVoltage() function can be used to give additional information about a particular Smart
Battery's expected terminal voltage.
SMBus Protocol: Read Word
Output:
Unsigned integer—the battery's designed terminal voltage in mV
• Units: mV
• Range: 0 mV to 65,535 mV
• Granularity: not applicable
• Accuracy: not applicable
Copyright © 2001–2011, Texas Instruments Incorporated
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