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BQ78412 Fiches technique(PDF) 27 Page - Texas Instruments

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No de pièce BQ78412
Description  Pb-Acid Battery State-of-Charge Indicator With Run-Time Display
Download  36 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

BQ78412 Fiches technique(HTML) 27 Page - Texas Instruments

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=
´
CAL
RAW
Voltage Gain
V
V
32768
´
æ
ö
=
ç
÷
è
ø
+
RAW
CAL
I
MeasScale
I
CurrentOffset
4096
bq78412
www.ti.com
SLUSAA0 – OCTOBER 2010
Table 11. bq78412 Parameter Set and Access Rights
ACCESS RIGHTS
ADDRESS
DATA
DEFAULT
PARAMETER
BYTES
LEVEL1
LEVEL2
DESCRIPTION
UNITS
OFFSET
TYPE(1)
VALUE
R
W
R
W
Upper byte = reserved
MultiDropAdr
2
U
Y
Y
Y
N
Hex
0x00
0xFF
Lower byte = Address of device when configured for multi-drop mode.
MANUFACTURER
InstallDate
2
U
Y
Y
Y
N
Installation date can be packed as (year-2010) x 512 + month x 32 + day
0x02
0xFFFF
ActivationDate
2
U
Y
Y
Y
N
Activation date can be packed as (year-2010) x 512 + month x 32 + day
0x04
0xFFFF
Packed
ActivationIndicator
2
Y
Y
Y
N
2 bytes indicating activation status, used as required by manufacturer.
0x06
0xFFFF
Alphanumeric
0xFFFF FFFF
Packed
MFGCodeSN
8
Y
Y
Y
N
Manufacturer code, serial number. etc, used as required by manufacturer.
0x08
Alphanumeric
FFFF FFFF
CALIBRATION
Scale factor to calibrate gain error on voltage measurement.
VoltageGain
2
U
Y
N
Y
N
32768
0x10
TempOffset
2
S
Y
N
Y
N
Temperature calibration offset. TCAL = TRAW + TempOffset
0
ºC
0x12
Scale factor to calibrate Gain Error on current measurement.
MeasScale
2
U
Y
N
Y
N
4096
0x14
CurrentOffset
2
S
Y
N
Y
N
Calibration offset for zero current
0
100 mA
0x16
MeasConfig
2
U
Y
N
Y
N
Current measurement configuration
13515
0x18
WARRANTY CHECKS
OtThresh
1
S
Y
N
Y
N
Maximum recommended battery temperature
60
ºC
0x1A
UtThresh
1
S
Y
N
Y
N
Minimum recommended battery temperature
0
ºC
0x1B
OvThresh
2
U
Y
N
Y
N
Maximum recommended battery voltage
14800
mV
0x1C
UvThresh
2
U
Y
N
Y
N
Minimum recommended battery voltage
10000
mV
0x1E
OccThresh
1
U
Y
N
Y
N
Maximum recommended charge current
4
10 A
0x20
OcdThresh
1
U
Y
N
Y
N
Maximum recommended discharge current
10
10 A
0x21
Threshold of capacity reduction in discharge below which DoD counters are not
DoDThresh
1
U
Y
N
Y
N
50
0.1 Ah
0x22
incremented.
(1)
S=signed integer, U=unsigned integer
Copyright © 2010, Texas Instruments Incorporated
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