BQ29312A Datasheet, PDF (21/35 Pages) Texas Instruments – TWO-CELL, THREE-CELL, AND FOUR-CELL LITHIUM-ION OR LITHIUM-POLYMER BATTERY PROTECTION AFE

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bq29312A
SLUS629A – JANUARY 2005 – REVISED AUGUST 2005
This register selects the short-circuit threshold voltage and delay for charge.
SCC(b3–b0) : These bits select the value of the short-circuit voltage threshold with 0000 as the default.
SCC(b3–b0) with corresponding SC threshold voltage
0000
0001
0010
0011
0.100 V
0.125 V
0.150 V
0.175 V
0100
0101
0110
0111
0.200 V
0.225 V
0.250 V
0.275 V
1000
1001
1010
1011
0.300 V
0.325 V
0.350 V
0.375 V
1100
1101
1110
1111
0.400 V
0.425 V
0.450 V
0.475 V
SCC(b7–b4): These bits select the value of the short-circuit delay time. Exceeding the short-circuit voltage
threshold for longer than this period turns off the corresponding CHG, DSG, and ZVCHG output. 0000 is the
default.
SCC(b7–b4) with corresponding SC delay time
0000
0001
0010
0011
0 µs
61 µs
122 µs
183 µs
0100
0101
0110
0111
244 µs
305 µs
366 µs
427 µs
1000
1001
1010
1011
488 µs
549 µs
610 µs
671 µs
1100
1101
1110
1111
732 µs
793 µs
854 µs
915 µs
SCD: Short Circuit in Discharge Configuration Register
7
SCDT3
6
SCDT2
5
SCDT1
SCD REGISTER (0x08)
4
3
SCDT0
SCDV3
2
SCDV2
1
SCDV1
0
SCDV0
This register selects the short-circuit threshold voltage and delay for discharge.
SCD(b3–b0) with corresponding SC threshold voltage with 0000 as the default.
SCD(b3–b0): These bits select the value of the short-circuit voltage threshold
0000
0001
0010
0011
0.10 V
0.125 V
0.150 V
0.175 V
0100
0101
0110
0111
0.20 V
0.225 V
0.250 V
0.275 V
1000
1001
1010
1011
0.30 V
0.325 V
0.350 V
0.375 V
1100
1101
1110
1111
0.40 V
0.425 V
0.450 V
0.475 V
SCD(b7–b4): These bits select the value of the short-circuit delay time. Exceeding the short-circuit voltage
threshold for longer than this period turns off the corresponding CHG, DSG, and ZVCHG output as has 0000 as
the default.
SCD(b7-b4) with corresponding SC delay time
0000
0001
0010
0011
0 µs
61 µs
122 µs
183 µs
0100
0101
0110
0111
244 µs
305 µs
366 µs
427 µs
1000
1001
1010
1011
488 µs
549 µs
610 µs
671 µs
1100
1101
1110
1111
732 µs
793 µs
854 µs
915 µs
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