BQ33100_15 Datasheet, PDF (24/67 Pages) Texas Instruments – Super Capacitor Manager

bq33100
SLUS987B – JANUARY 2011 – REVISED DECEMBER 2015
SUBCLASS
ID
SUBCLASS
NAME
OFFSET
104
Data
12
NAME
Cap3 K-
factor
Table 10. Cap3 K-factor
FORMAT
SIZE IN
BYTES
Integer
2
MIN
VALUE
0
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MAX
VALUE
32767
DEFAULT
VALUE
20500
UNIT
8.3.8.8 Cap4 K-factor
This register value stores the ADC voltage translation factor for Capacitor 4, which is connected between the
VC4 and VC5 pins. By default, this value is not used and the factory calibration are in effect. This value overrides
the factory calibration when the K-factor Override Flag is set to 0x9669 by the software calibration process. The
calibration routine sets this value, however the value can be manually modified according to Equation 8:
New StackVoltageKfactor = Existing StackVoltageKfactor × Actual Applied Voltage / Reported Voltage
(8)
SUBCLASS
ID
SUBCLASS
NAME
OFFSET
104
Data
14
NAME
Cap4 K-
factor
Table 11. Cap4 K-factor
FORMAT
SIZE IN
BYTES
Integer
2
MIN
VALUE
0
MAX
VALUE
32767
DEFAULT
VALUE
20500
UNIT
8.3.8.9 Cap5 K-factor
This register value stores the ADC voltage translation factor for the bottom capacitor (Capacitor 5), which is
connected between the VC5 and VSS pins. The calibration routine sets this value, however the value can be
manually modified according to Equation 9:
New StackVoltageKfactor = Existing StackVoltageKfactor × Actual Applied Voltage / Reported Voltage
(9)
SUBCLASS
ID
SUBCLASS
NAME
OFFSET
104
Data
16
NAME
Cap5 K-
factor
Table 12. Cap5 K-factor
FORMAT
SIZE IN
BYTES
Integer
2
MIN
VALUE
0
MAX
VALUE
32767
DEFAULT
VALUE
20500
UNIT
8.3.8.10 K-factor Override Flag
This register value is by default 0, indicating that the factory calibrated K-factors are being used. If this register is
set to 0x9669, Cap1 to approximately Cap5 K-factors in the data flash are used for voltage translation.
Table 13. K-factor Override Flag
SUBCLASS
ID
104
SUBCLASS
NAME
Data
OFFSET NAME
18
K-factor
Override Flag
FORMAT
Hex
SIZE IN
BYTES
2
MIN
VALUE
0x0
MAX
VALUE
0xffff
DEFAULT
VALUE
0x0
UNIT
8.3.8.11 System Voltage K-factor
This register value stores the scale factor for the PackVoltage, voltage measured at the VCCPACK pin of the
bq33100. The calibration routine sets this value, however the value can be manually modified according to
Equation 10:
New StackVoltageKfactor = Existing StackVoltageKfactor × Actual Applied Voltage / Reported Voltage
(10)
SUBCLASS
ID
SUBCLASS
NAME
OFFSET
104
Data
20
Table 14. System Voltage K-factor
NAME
System
Voltage K-
factor
FORMAT
Integer
SIZE IN
BYTES
2
MIN
VALUE
0
MAX
VALUE
32767
DEFAULT
VALUE
UNIT
24500
24
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