BQ24298_15 Datasheet, PDF (33/51 Pages) Texas Instruments – bq24298 I2C Controlled 3A Single Cell USB Charger With Narrow VDC Power Path Management and Adjustable Voltage USB OTG

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8.6.1.5 Charge Voltage Control Register REG04 [reset = 10110010, or 0xB2]
bq24298
SLUSC59 – APRIL 2015
Figure 31. Charge Voltage Control Register REG04 Format
7
6
VREG[5]
VREG[4]
R/W
R/W
LEGEND: R/W = Read/Write
5
VREG[3]
R/W
4
VREG[2]
R/W
3
VREG[1]
R/W
2
VREG[0]
R/W
1
BATLOWV
R/W
0
VRECHG
R/W
Table 10. Charge Voltage Control Register REG04 Field Description
BIT FIELD
TYPE
RESET DESCRIPTION
Charge Voltage Limit
Bit 7 VREG[5]
R/W
1
512 mV
Bit 6 VREG[4]
R/W
0
256 mV
Bit 5 VREG[3]
R/W
1
128 mV
Bit 4 VREG[2]
R/W
1
64 mV
Bit 3 VREG[1]
R/W
1
32 mV
Bit 2 VREG[0]
R/W
1
16 mV
Bit 1 BATLOWV
R/W
1
0 – 2.8 V, 1 – 3.0 V
Battery Recharge Threshold (below battery regulation voltage)
Bit 0 VRECHG
R/W
0
0 – 100 mV, 1 – 300 mV
NOTE
Offset: 3.504 V
Range: 3.504 V – 4.400 V
Default: 4.208 V
Default: 3.0 V (1) (pre-charge to fast charge)
Default: 100 mV (0)
8.6.1.6 Charge Termination/Timer Control Register REG05 [reset = 11011100, or 0xDC]
Figure 32. Charge Termination/Timer Control Register REG05 Format
7
6
EN_TERM
Reserved
R/W
R/W
LEGEND: R/W = Read/Write
5
4
WATCHDOG[1] WATCHDOG[0]
R/W
R/W
3
EN_TIMER
R/W
2
1
CHG_TIMER[1] CHG_TIMER[0]
R/W
R/W
0
Reserved
R/W
Table 11. Charge Termination/Timer Control Register REG05 Field Description
BIT FIELD
TYPE
Charging Termination Enable
Bit 7 EN_TERM
R/W
Bit 6
BATFET_RST_
EN
R/W
I2C Watchdog Timer Setting
Bit 5 WATCHDOG[1] R/W
Bit 4 WATCHDOG[0] R/W
Charging Safety Timer Enable
Bit 3 EN_TIMER
R/W
Fast Charge Timer Setting
Bit 2 CHG_TIMER[1] R/W
Bit 1 CHG_TIMER[0] R/W
Bit 0 Reserved
R/W
RESET DESCRIPTION
NOTE
1
0 – Disable, 1 – Enable
1
0 – Disable, 1 – Enable
Default: Enable termination (1)
Default: Enable (1)
This bit will only be reset to default value upon
power-on-reset and soft reset (i.e. REG01[7]).
0
00 – Disable timer, 01 – 40 s, 10 – Default: 40 s (01)
1
80 s, 11 – 160 s
1
0 – Disable, 1 – Enable
Default: Enable (1)
0
00 – 5 hrs, 01 – 8 hrs, 10 – 12 hrs, Default: 12 hrs (10)
1
11 – 20 hrs
(See Charging Safety Timer for details)
0
0 - Reserved
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