Texas Instruments BQ27505EVM - BQ27505 System-Side, Single-Cell Impedance Track??? Technology Evaluation Module BQ27505E BQ27505EVM 데이터 시트
제품 코드
BQ27505EVM
Not Recommended for New Designs
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SLUS884 – FEBRUARY 2009
4.1.1.21 StateofHealth( ): 0x28/0x29
0x28 SOH percentage: this read-only function returns an unsigned integer value, expressed as a
percentage of the ration of predicted FCC(25°C, SOH LoadI) over the DesignCapacity(). The FCC(25°C,
SOH LoadI) is the calculated full charge capacity at 25°C and the SOH LoadI which is specified in the
data flash. The range of the returned SOH percentage is 0x00 to 0x64, indicating 0 to 100%
correspondingly.
percentage of the ration of predicted FCC(25°C, SOH LoadI) over the DesignCapacity(). The FCC(25°C,
SOH LoadI) is the calculated full charge capacity at 25°C and the SOH LoadI which is specified in the
data flash. The range of the returned SOH percentage is 0x00 to 0x64, indicating 0 to 100%
correspondingly.
0x29 SOH Status: this read-only function returns an unsigned integer value, indicating the status of the
SOH percentage. The meanings of the returned value are:
SOH percentage. The meanings of the returned value are:
•
0x00: SOH not valid (initialization)
•
0x01: Instant SOH value ready
•
0x02: Initial SOH value ready
–
–
Calculation based on uncompensated Qmax
–
Updated at first grid point update after cell insertion
•
0x03: SOH value ready
–
–
Utilize the updated Qmax update
–
Calculation based on compensated Qmax
–
Updated after complete charge and relax is complete
•
0x04-0xFF: Reserved
4.1.1.22
StateOfCharge( ): 0x2c/0x2d
This read-only function returns an unsigned integer value of the predicted remaining battery capacity
expressed as a percentage of FullChargeCapacity( ), with a range of 0 to 100%.
expressed as a percentage of FullChargeCapacity( ), with a range of 0 to 100%.
4.1.1.23 NormalizedImpedanceCal( ): 0x2e/0x2f
This read-only function returns an unsigned integer value of the calculated normalized impedance to 0°C
at the current Depth of Discharge, with the unit of m
at the current Depth of Discharge, with the unit of m
Ω
.
4.1.1.24 InstaneousCurrent Reading( ) 0x30/0x31
This read-only function returns a signed integer value that is the instantaneous current flow through the
sense resistor. The conversion time is 125ms. It is updated every 1 second. Units are mA.
sense resistor. The conversion time is 125ms. It is updated every 1 second. Units are mA.
4.1.2
EXTENDED DATA COMMANDS
Extended commands offer additional functionality beyond the standard set of commands. They are used in
the same manner; however, unlike standard commands, extended commands are not limited to 2-byte
words. The number of commands bytes for a given extended command ranges in size from single to
multiple bytes, as specified in
the same manner; however, unlike standard commands, extended commands are not limited to 2-byte
words. The number of commands bytes for a given extended command ranges in size from single to
multiple bytes, as specified in
Table 4-5. Extended Data Commands
COMMAND
SEALED
UNSEALED
NAME
UNITS
CODE
ACCESS
(1) (2)
ACCESS
(1) (2)
Reserved
RSVD
0x34...0x3b
N/A
R
R
DesignCapacity( )
DCAP
0x3c / 0x3d
mAh
R
R
DataFlashClass( )
(2)
DFCLS
0x3e
N/A
N/A
R/W
DataFlashBlock( )
(2)
DFBLK
0x3f
N/A
R/W
R/W
Authenticate( )/BlockData( )
A/DF
0x40…0x53
N/A
R/W
R/W
AuthenticateCheckSum( )/BlockData( )
ACKS/DFD
0x54
N/A
R/W
R/W
BlockData( )
DFD
0x40…0x5f
N/A
R
R/W
BlockDataCheckSum( )
DFDCKS
0x60
N/A
R/W
R/W
(1)
SEALED and UNSEALED states are entered via commands to Control() 0x00/0x01.
(2)
In sealed mode, data flash CANNOT be accessed through commands 0x3e and 0x3f.
Copyright © 2009, Texas Instruments Incorporated
GENERAL DESCRIPTION
17
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