BQ2083-V1P3 Datasheet, PDF (34/56 Pages) Texas Instruments – SBS-COMPLIANT GAS GAUGE IC FOR USE WITH THE bq29311

bq2083-V1P3
SLVS508 − OCTOBER 2003
www.ti.com
DesignCapacity( ) (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’s power management in conjunction 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 units of mAh or 10 mWh.
Units
Range
Granularity
Accuracy
BATTERY MODES
CAPACITY_MODE
BIT = 0
CAPACITY_MODE
BIT = 1
mAh
10 mWh
0–65,535 mAh
0–65,535 10 mWh
Not applicable
Not applicable
Not applicable
Not applicable
DesignVoltage( ) (0x19)
Description: Returns the theoretical voltage of a new pack (mV). The bq2083−V1P3 sets DesignVoltage( ) to
the value programmed in Design Voltage DF 0x04−0x05.
Purpose: The DesignVoltage( ) function can be used to give additional information about a particular smart
battery expected terminal voltage.
SMBus protocol: Read word
Output: Unsigned integerthe battery’s designed terminal voltage in mV
Units: mV
Range: 0 to 65,535 mV
Granularity: Not applicable
Accuracy: Not applicable
SpecificationInfo( ) (0x1a)
Description: Returns the version number of the smart battery specification the battery pack supports, as well
as voltage and current scaling information in a packed unsigned integer. Power scaling is the product of the voltage
scaling times the current scaling. The SpecificationInfo is packed in the following fashion:
(SpecID_H _* 0x10 + SpecID_L) + (VScale + IPScale _* 0x10) _* 0x100.
The bq2083−V1P3 VScale (voltage scaling) and IPScale (current scaling) should always be set to zero. The
bq2083−V1P3 sets SpecificationInfo( ) to the value programmed in Specification Information DF 0x06-0x07.
Purpose: The SpecificationInfo( ) function is used by the SMBus host’s power management system to determine
what information the smart battery can provide.
SMBus protocol: Read word
Output: Unsigned integerpacked specification number and scaling information:
FIELD
SpecID_L
SpecID_H
VScale
IPScale
BITS USED
0...3
4...7
8...11
12...15
FORMAT
4-bit binary value
4-bit binary value
4-bit binary value
4-bit binary value
ALLOWABLE VALUES
0–15
0–15
0 (multiplies voltage by 10^ VScale)
0 (multiplies current by 10 ^ IPScale)
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