BQ33100_15 Datasheet, PDF (25/67 Pages) Texas Instruments – Super Capacitor Manager

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bq33100
SLUS987B – JANUARY 2011 – REVISED DECEMBER 2015
8.3.8.12 Stack Voltage K-factor
This register value stores the scale factor for the Stack Voltage, voltage measured at the VCC pin of the
bq33100. The calibration routine sets this value, however the value can be manually modified according to
Equation 11:
New StackVoltageKfactor = Existing StackVoltageKfactor × Actual Applied Voltage / Reported Voltage
(11)
SUBCLASS
ID
SUBCLASS
NAME
OFFSET
104
Data
22
Table 15. Stack Voltage K-factor
NAME
Stack
Voltage K-
factor
FORMAT
Integer
SIZE IN
BYTES
2
MIN
VALUE
0
MAX
VALUE
32767
DEFAULT
VALUE
UNIT
24500
8.3.8.13 K-factor Stack Override Flag
This register value is by default 0, indicating that the factory calibrated stack K-factor is being used. If this
register is set to 0x9669, Stack Voltage K-factor in the data flash are used for stack voltage translation.
Table 16. K-factor Stack Override Flag
SUBCLASS
ID
104
SUBCLASS
NAME
Data
OFFSET NAME
24
K-factor stack
Override Flag
FORMAT
Hex
SIZE IN
BYTES
2
MIN
VALUE
0x0
MAX
VALUE
0xffff
DEFAULT
VALUE
0x0
UNIT
8.3.8.14 CC Offset
This register value stores the coulomb counter offset compensation. It is set during CC Offset calibration, or by
automatic calibration of the bq33100 before the gauge enters shutdown. TI does not recommend to manually
change this value.
SUBCLASS
ID
104
SUBCLASS
NAME
Data
OFFSET
20
NAME
CC Offset
Table 17. CC Offset
FORMAT
Integer
SIZE IN
BYTES
2
MIN
VALUE
–32768
MAX
VALUE
32767
DEFAULT
VALUE
–7744
UNIT
(mV)
8.3.8.15 Board Offset
This register value stores the compensation for the PCB dependant coulomb counter offset. TI recommends to
use characterization data of the actual PCB to set this value.
Table 18. Board Offset
SUBCLASS
ID
104
SUBCLASS
NAME
Data
OFFSET
22
NAME
Board Offset
FORMAT
Integer
SIZE IN
BYTES
2
MIN
VALUE
–32767
MAX
VALUE
32767
DEFAULT
VALUE
0
UNIT
uV
8.3.8.16 Int Temp Offset
This register value stores the internal temperature sensor offset compensation. Use calibration routines to set
this value
SUBCLASS
ID
SUBCLASS
NAME
OFFSET
104
Data
24
Table 19. Int Temp Offset
NAME
Int Temp
Offset
FORMAT
Integer
SIZE IN
BYTES
1
MIN
VALUE
–128
MAX
VALUE
127
DEFAULT
VALUE
0
UNIT
0.1ºC
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