BQ24292I Datasheet, PDF (17/42 Pages) Texas Instruments – I2C Controlled 4.5A Single Cell USB/Adapter Charger With Narrow VDC Power Path Management and USB OTG

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bq24292i
SLUSBI4 – APRIL 2013
Pre-Charge/Termination Current Control Register REG 03 (default 00010001, or 11)
BIT
DESCRIPTION
NOTE
Pre-Charge Current Limit
Bit 7
Bit 6
Bit 5
IPRECHG[3]
IPRECHG[2]
IPRECHG[1]
1024mA
512mA
256mA
Offset: 128mA,
Range: 128mA – 640mA
Default: 256mA (0001)
Bit 4 IPRECHG[0] 128mA
Termination Current Limit
Bit 3
Bit 2
Bit 1
ITERM[3]
ITERM[2]
ITERM[1]
1024mA
512mA
256mA
Offset: 128mA
Range: 128mA – 2048mA
Default: 256mA (0001)
Bit 0 ITERM[0]
128mA
Charge Voltage Control Register REG04 (default: 10011010, or 9A)
BIT
DESCRIPTION
Charge Voltage Limit
Bit 7 VREG[5]
512mV
Bit 6 VREG[4]
256mV
Bit 5 VREG[3]
128mV
Bit 4 VREG[2]
64mV
Bit 3 VREG[1]
32mV
Bit 2 VREG[0]
16mV
Battery Precharge to Fast Charge Threshold
Bit 1 BATLOWV 0 – 2.8V, 1 – 3.0V
Battery Recharge Threshold (below battery regulation voltage)
Bit 0 VRECHG
0 – 100mV, 1 – 300mV
NOTE
Offset: 3.504V
Range: 3.504V – 4.400V (111000)
Default: 4.112V (100110)
Default: 3.0V (1)
Default: 100mV (0)
Charge Termination/Timer Control Register REG05 (default 10011010, or 9A)
BIT
DESCRIPTION
NOTE
Charging Termination Enable
Bit 7 EN_TERM
0 – Disable, 1 – Enable
Default: Enable termination (1)
Termination Indicator Threshold
Bit 6
TERM_STAT
0 – Match ITERM,
1 – STAT pin high before actual termination
when charge current below 800 mA
Default Match ITERM (0)
I2C Watchdog Timer Setting
Bit 5
Bit 4
WATCHDOG[1] 00 – Disable timer, 01 – 40s, 10 – 80s, 11 – Default: 40s (01)
WATCHDOG[0] ^160s
Charging Safety Timer Enable
Bit 3 EN_TIMER
0 – Disable, 1 – Enable
Default: Enable (1)
Fast Charge Timer Setting
Bit 2
Bit 1
CHG_TIMER[1] 00 – 5 hrs, 01 – 8 hrs, 10 – 12 hrs, 11 – 20
CHG_TIMER[0] ^hrs
Default: 8hours (01)
(See Charging Safety Timer for details)
Bit 0 Reserved
0 - Reserved
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