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BQ78412 Fiches technique(PDF) 30 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) 30 Page - Texas Instruments

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=
´
0.4
Pscale
4827
rated current
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
ALGORITHMS
Percentage of charge current actually stored by battery. Any charge current is
ChgEff
1
U
N
N
N
N
derated by this parameter. See Charge Efficiency Compensation section for
100%
0x49
details.
Peukart Scaling Factor. Unique for each battery and generated along with the
battery characterization table. When using the pre-programmed default table,
calculate this using:
P-Scale
2
N
N
N
N
Hex
0x4A
0x2A37
CurrentAvgTime
2
U
N
N
N
N
Current averaging time
120
seconds
0x4C
IdleThresh
2
U
N
N
N
N
Current level below which the part is considered to be in idle state.
3
100 mA
0x4E
Current at which battery transitions to charge or discharge mode from idle or
TransToActive
2
U
N
N
N
N
10
100 mA
0x50
sleep modes.
Time in idle mode after which the bq78412 transitions to low-power sleep state
SleepTime
2
U
N
N
N
N
30
seconds
0x52
with the display off.
PASSWORDS
Level0Password
4
N
N
N
N
Four byte password for SealedLevel0 access.
Hex
0x54
0xFFFF FFFF
Level1Password
4
Y
Y
N
N
Four byte password for SealedLevel1 access.
Hex
0x58
0xFFFF FFFF
30
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Product Folder Link(s): bq78412


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