BQ25700A Datasheet, PDF (56/82 Pages) Texas Instruments – SMBus Multi-Chemistry Battery Buck-Boost Charge Controller With System Power Monitor and Processor Hot Monitor

bq25700A
SLUSCQ8 – MAY 2017
www.ti.com
8.6.6.1.3 InputVoltage Register (SMBus address = 3Dh) [reset = VBUS-1.28V]
To set the input voltage limit, write a 16-bit InputVoltage register command (REG0x3D()) using the data format
listed in Table 35 and Table 36.
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 31. InputVoltage Register (SMBus address = 3Dh) [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 35. InputVoltage Register (SMBus address = 3Dh) Field Descriptions
SMBus
BIT
15-14
13
12
11
10
9
8
FIELD
TYPE RESET
DESCRIPTION
Reserved
R/W
00b
Not used. 1 = invalid write.
Input Voltage, bit 7
R/W
0b
0 = Adds 0 mV of input voltage.
1 = Adds 8192 mV of input voltage.
Input Voltage, bit 6
R/W
0b
0 = Adds 0 mV of input voltage.
1 = Adds 4096mV of input voltage.
Input Voltage, bit 5
R/W
0b
0 = Adds 0 mV of input voltage.
1 = Adds 2048 mV of input voltage.
Input Voltage, bit 4
R/W
0b
0 = Adds 0 mV of input voltage.
1 = Adds 1024 mV of input voltage.
Input Voltage, bit 3
R/W
0b
0 = Adds 0 mV of input voltage.
1 = Adds 512 mV of input voltage.
Input Voltage, bit 2
R/W
0b
0 = Adds 0 mV of input voltage.
1 = Adds 256 mV of input voltage.
Table 36. InputVoltage Register (SMBus address = 3Dh) Field Descriptions
SMBus
BIT
7
FIELD
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
56
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