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BQ78412 Fiches technique(PDF) 28 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) 28 Page - Texas Instruments

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bq78412
SLUSAA0 – OCTOBER 2010
www.ti.com
Table 11. bq78412 Parameter Set and Access Rights (continued)
ACCESS RIGHTS
ADDRESS
DATA
DEFAULT
PARAMETER
BYTES
LEVEL1
LEVEL2
DESCRIPTION
UNITS
OFFSET
TYPE(1)
VALUE
R
W
R
W
BATTERY AND INVERTER
DesignCapacity
2
U
Y
N
Y
N
Battery design capacity.
1500
100 mAhr
0x24
Chem ID
1
U
Y
N
Y
N
Battery chemistry ID. Indicates the chemistry file in use.
0
0x26
NumberCells
1
U
Y
N
Y
N
Number of nominal 2-V cells in battery
6
0x27
Time after start of charge taper current detection that battery is fully charged. Sets
ChgTaperTime
2
U
Y
N
Y
N
600
minutes
0x28
FULL flag on this event.
Time after start of charge that battery is considered fully charged. Sets FULL flag
ChargeTime
2
U
Y
N
Y
N
1200
minutes
0x2A
on this event.
EndDschgVolt
2
U
Y
N
Y
N
Voltage below which battery is considered at end of discharge.
10800
mV
0x2C
AGING ALGORITHM
Number of days after which FCC is decremented by 0.1 Ah in the capacity aging
CapDerateL
1
U
N
N
N
N
20
days
0x2E
algorithm, before DerateChange.
Number of days after which FCC is decremented by 0.1 Ah in the capacity aging
CapDerateH
1
U
N
N
N
N
10
days
0x2F
algorithm, after DerateChange.
Number of days after which the aging algorithm changes slope from CapDerateL
DerateChange
2
U
N
N
N
N
730
days
0x30
to CapDerateH.
SoH CALCULATION
End-of-life battery capacity. When full charge capacity falls below the value in this
EolCAP
2
U
N
N
N
N
1200
100 mAhr
0x32
parameter the REPLACE LED is turned on.
Number of full charge/discharge cycles, or equivalent, after which the battery is
LifeCycles
2
U
N
N
N
N
considered to need replacing. When this cycle count is reached the REPLACE
1000
0x34
LED is turned on.
Battery capacity at which WARN LED is turned on to indicate battery is
EOLCapWarn
2
U
N
N
N
N
1300
100 mAhr
0x36
approaching end of life.
Number of charge/discharge cycles at which WARN LED is turned on to indicate
LifeCycleWarn
2
U
N
N
N
N
800
0x38
battery is approaching end of life.
28
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