BQ24297 Datasheet, PDF (19/48 Pages) Texas Instruments – I2C Controlled 3A Single Cell USB Charger

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SLUSBP6A – SEPTEMBER 2013 – REVISED OCTOBER 2013
Charge Current Control Register REG02 (default 01100000, or 60)
BIT
DESCRIPTION
Fast Charge Current Limit
Bit 7 ICHG[5]
2048mA
Bit 6 ICHG[4]
1024mA
Bit 5 ICHG[3]
512mA
Bit 4 ICHG[2]
256mA
Bit 3 ICHG[1]
128mA
Bit 2 ICHG[0]
64mA
Bit 1 BCOLD
Set Boost Mode temperature monitor threshold
voltage to disable boost mode
0 – V_bcold0 (Typ. 76% of REGN or -10◦C w/ 103AT
thermistor )
1 – V_bcold1 (Typ. 79% of REGN or -20◦C w/ 103AT
thermistor)
Bit 0 FORCE_20PCT
0 – ICHG as Fast Charge Current (REG02[7:2])
and IPRECH as Pre-Charge Current (REG03[7:4])
programmed
1 – ICHG as 20% Fast Charge Current
(REG02[7:2]) and IPRECH as 50% Pre-Charge
Current (REG03[7:4]) programmed
NOTE
Offset: 512mA
Range: 512-3008mA (000000 - 100111)
Default: 2048mA (011000)
Note: ICHG higher than 3008mA is not suported
Default: V_bcold0 (0)
Default: ICHG as Fast Charge Current (REG02[7:2]) and
IPRECH as Pre-Charge Current (REG03[7:4])
programmed (0)
Pre-Charge/Termination Current Control Register REG 03 (default 00010001, or 0x11)
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 – 2048mA
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 10110010, or 0xB2)
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
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
Default: 4.208V
Default: 3.0V (1) (pre-charge to fast charge)
Default: 100mV (0)
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