BQ25872 Datasheet, PDF (39/68 Pages) Texas Instruments – Battery Switch Charger

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bq25872
SLUSCQ6 – OCTOBER 2016
8.5.11 REG09 (PROTECTION)
Figure 30. REG09 (PROTECTION)
7
6
5
4
3
1
0
1
0
0
R/W
R/W
R/W
R/W
R
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
2
1
0
0
0
0
R
R/W
R/W
Table 12. REG09
Bit Field
7 IBUS_OCP[3]
6 IBUS_OCP[2]
5 IBUS_OCP[1]
4 IBUS_OCP[0]
3 Reserved
2 Reserved
1 OCP_RES
0 VBUS_OVP_DLY
Reset
Type
Description
REG_RST Watchdog
EN
R/W
Y
N
Y
4A
VBUS input overcurrent threshold
R/W
Y
N
Y
2A
Offset: none
Range: 0 A to 7.5 A
R/W
Y
N
Y
1A
Default: 5 A (1010)
R/W
Y
N
Y
0.5 A
R
Y
N
Y
Reserved bit. Always read 0.
R
Y
N
Y
Reserved bit. Always read 0.
Controls the response of the OCP event or IBUS
0 – BLANKING mode; the device will wait 128 µs
before the battery switch is disabled and latched off
R/W
Y
N
Y
(default)
1 – HICCUP mode; battery switch is disabled
instantaneously, and the device will attampt to turn on
the battery switch every 100 ms, up to 7 times before
latching off.
Set VBUS fault deglitch time
R/W
Y
N
Y
0 – 8 µs deglitch time (default)
1 – 128 µs deglitch time
8.5.12 REG0A (VBUS_OVP)
Figure 31. REG0A (VBUS_OVP)
7
6
5
4
3
2
1
0
0
0
1
0
1
0
1
1
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Bit Field
7 Reserved
6 VBUS_OVP[6]
5 VBUS_OVP[5]
4 VBUS_OVP[4]
3 VBUS_OVP[3]
2 VBUS_OVP[2]
1 VBUS_OVP[1]
0 VBUS_OVP[0]
Type
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Table 13. REG0A (VBUS_OVP)
Reset
Description
REG_RST Watchdog
EN
Y
N
Y
Reserved bit. Always read 0.
Y
N
Y
1920 mV VBUS over voltage threshold
Y
N
Y
960 mV
Offset: 4.2 V
Range: 4.2 V to 6.51 V
Y
N
Y
480 mV Default: 5.49 V (00101011)
Y
N
Y
240 mV
Y
N
Y
120 mV
Y
N
Y
60 mV
Y
N
Y
30 mV
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