BQ24190_15 Datasheet, PDF (32/52 Pages) Texas Instruments – bq2419x I2C Controlled 4.5-A Single Cell USB/Adapter Charger with Narrow VDC Power Path Management and USB OTG

bq24190, bq24192, bq24192I
SLUSAW5B – JANUARY 2012 – REVISED DECEMBER 2014
www.ti.com
9.5.1.5 Charge Voltage Control Register REG04 (bq24190, bq241192 reset = 10110010, or B2; bq24192I
reset = 10011010, or 9A)
Figure 30. REG04 Charge Voltage Control Register Format
7
6
5
4
VREG[5]
VREG[4]
VREG[3]
VREG[2]
R/W
R/W
R/W
R/W
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
3
VREG[1]
R/W
2
VREG[0]
R/W
1
BATLOWV
R/W
0
VRECHG
R/W
Table 12. REG04 Charge Voltage Control Register 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 0: (bq24192I) 128 mV
1: (bq24190/92)
Bit 4 VREG[2]
R/W 1
64 mV
Bit 3 VREG[1]
R/W 0: (bq24190/92) 32 mV
1: (bq24192I)
Bit 2 VREG[0]
R/W 0
16 mV
Battery Precharge to Fast Charge Threshold
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 to 4.400 V (111000)
Default:
bq24190, bq24192: 4.208 V (101100)
bq24192I: 4.112 V (100110)
Default: 3.0 V (1)
Default: 100 mV (0)
9.5.1.6 Charge Termination/Timer Control Register REG05 (reset = 10011010, or 9A)
Figure 31. REG05 Charge Termination/Timer Control Register Format
7
6
5
4
EN_TERM TERM_STAT WATCHDOG[1] WATCHDOG[0]
R/W
R/W
R/W
R/W
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
3
EN_TIMER
R/W
2
1
CHG_TIMER[1] CHG_TIMER[0]
R/W
R/W
0
Reserved
R/W
Table 13. REG05 Charge Termination/Timer Control Register Description
BIT FIELD
TYPE
Charging Termination Enable
Bit 7 EN_TERM
R/W
Termination Indicator Threshold
Bit 6 TERM_STAT
R/W
RESET
1
0
I2C Watchdog Timer Setting
Bit 5 WATCHDOG[1]
R/W 0
Bit 4 WATCHDOG[0]
R/W 1
Charging Safety Timer Enable
Bit 3 EN_TIMER
R/W 1
Fast Charge Timer Setting
Bit 2 CHG_TIMER[1]
R/W 0
Bit 1 CHG_TIMER[0]
R/W 1
Bit 0 Reserved
R/W 0
DESCRIPTION
NOTE
0 – Disable, 1 – Enable
Default: Enable termination (1)
0 – Match ITERM,
1 – STAT pin high before actual
termination when charge current
below 800 mA
Default Match ITERM (0)
00 – Disable timer, 01 – 40 s,
10 – 80 s, 11 – 160 s
Default: 40 s (01)
0 – Disable, 1 – Enable
Default: Enable (1)
00 – 5 hrs, 01 – 8 hrs, 10 – 12
hrs, 11 – 20 hrs
0 - Reserved
Default: 8 hours (01)
(See Charging Safety Timer for details)
Reserved. Must write "0"
32
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