BQ25703A Datasheet, PDF (36/81 Pages) Texas Instruments – I2C Multi-Chemistry Battery Buck-Boost Charge Controller With System Power Monitor and Processor Hot Monitor

bq25703A
SLUSCU1 – MAY 2017
8.6.1.2 ChargeOption1 Register (I2C address = 31h/30h) [reset = 211h]
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Figure 24. ChargeOption1 Register (I2C address = 31h/30h) [reset = 211h]
15
EN_IBAT
R/W
14
13
EN_PROCHOT_LPWR
R/W
12
EN_PSYS
R/W
11
RSNS_RAC
R/W
10
RSNS_RSR
R/W
9
PSYS_RATIO
R/W
8
Reserved
R/W
7
CMP_REF
6
CMP_POL
5
4
CMP_DEG
R/W
R/W
R/W
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
3
FORCE_
LATCHOFF
R/W
2
Reserved
R/W
1
EN_SHIP_
DCHG
R/W
0
AUTO_
WAKEUP_EN
R/W
Table 7. ChargeOption1 Register (I2C address = 31h) Field Descriptions
I2C
31h
FIELD
TYPE RESET DESCRIPTION
7 EN_IBAT
R/W 0b
IBAT Enable
Enable the IBAT output buffer. In low power mode (REG0x01[7] = 1), IBAT buffer
is always disabled regardless of this bit value.
0b Turn off IBAT buffer to minimize Iq <default at POR>
1b: Turn on IBAT buffer
6-5 EN_PROCHOT
_LPWR
R/W 00b
Enable PROCHOT during battery only low power mode
With battery only, enable IDCHG or VSYS in PROCHOT with low power
consumption. Do not enable this function with adapter present. Refer to
PROCHOT During Low Power Mode for more details.
00b: Disable low power PROCHOT <default at POR>
01b: Enable IDCHG low power PROCHOT
10b: Enable VSYS low power PROCHOT
11b: Reserved
4 EN_PSYS
R/W 0b
PSYS Enable
Enable PSYS sensing circuit and output buffer (whole PSYS circuit). In low power
mode (REG0x01[7] = 1), PSYS sensing and buffer are always disabled regardless
of this bit value.
0b: Turn off PSYS buffer to minimize Iq <default at POR>
1b: Turn on PSYS buffer
3 RSNS_RAC
R/W 0b
Input sense resistor RAC
0b: 10 mΩ <default at POR>
1b: 20 mΩ
2 RSNS_RSR
R/W 0b
Charge sense resistor RSR
0b: 10 mΩ <default at POR>
1b: 20 mΩ
1 PSYS_RATIO
R/W 1b
PSYS Gain
Ratio of PSYS output current vs total input and battery power with 10-mΩ sense
resistor.
0b: 0.25 µA/W
1b: 1 µA/W <default at POR>
0 Reserved
R/W 0b
Reserved
Table 8. ChargeOption1 Register (I2C address = 30h) Field Descriptions
I2C
30h
FIELD
7 CMP_REF
TYPE
R/W
RESET DESCRIPTION
0b
Independent Comparator Reference
Independent comparator internal reference.
0b: 2.4 V <default at POR>
1b: 1.3 V
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