BQ25703A Datasheet, PDF (58/81 Pages) Texas Instruments – I2C Multi-Chemistry Battery Buck-Boost Charge Controller With System Power Monitor and Processor Hot Monitor

bq25703A
SLUSCU1 – MAY 2017
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8.6.6.1.3 InputVoltage Register (I2C address = 0B/0Ah) [reset = VBUS-1.28V]
To set the input voltage limit, write a 16-bit InputVoltage register command (REG0x0B/0A()) using the data
format listed in Table 33 and Table 34.
If the input voltage drops more than the InputVoltage register allows, the device enters DPM and reduces the
charge current. The default offset voltage is 1.28 V below the no-load VBUS voltage. The DC offset is 3.2 V
(0000000).
Figure 37. InputVoltage Register (I2C address = 0B/0Ah) [reset = VBUS-1.28V]
15
14
Reserved
R/W
13
Input Voltage,
bit 7
R/W
12
Input Voltage,
bit 6
R/W
11
Input Voltage,
bit 5
R/W
10
Input Voltage,
bit 4
R/W
9
Input Voltage,
bit 3
R/W
7
6
5
4
3
2
1
Input Voltage, Input Voltage,
bit 1
bit 0
Reserved
R/W
R/W
R/W
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 33. InputVoltage Register (I2C address = 0Bh) Field Descriptions
I2C
0Bh
FIELD
TYPE
RESET
DESCRIPTION
7-6 Reserved
R/W
00b
Not used. 1 = invalid write.
5
Input Voltage, bit 7
R/W
0b
0 = Adds 0 mV of input voltage.
1 = Adds 8192 mV of input voltage.
4
Input Voltage, bit 6
R/W
0b
0 = Adds 0 mV of input voltage.
1 = Adds 4096mV of input voltage.
3
Input Voltage, bit 5
R/W
0b
0 = Adds 0 mV of input voltage.
1 = Adds 2048 mV of input voltage.
2
Input Voltage, bit 4
R/W
0b
0 = Adds 0 mV of input voltage.
1 = Adds 1024 mV of input voltage.
1
Input Voltage, bit 3
R/W
0b
0 = Adds 0 mV of input voltage.
1 = Adds 512 mV of input voltage.
0
Input Voltage, bit 2
R/W
0b
0 = Adds 0 mV of input voltage.
1 = Adds 256 mV of input voltage.
Table 34. InputVoltage Register (I2C address = 0Ah) Field Descriptions
I2C
0Ah
FIELD
7
Input Voltage, bit 1
6
Input Voltage, bit 0
5-0 Reserved
TYPE
R/W
R/W
R/W
RESET
0b
0b
000000b
DESCRIPTION
0 = Adds 0 mV of input voltage.
1 = Adds 128 mV of input voltage.
0 = Adds 0 mV of input voltage.
1 = Adds 64 mV of input voltage
Not used. Value Ignored.
8
Input Voltage,
bit 2
R/W
0
58
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