BQ24295 Datasheet, PDF (17/45 Pages) Texas Instruments – I2C Controlled 3A Single Cell USB Charger

bq24295
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I²C Registers
Address: 6BH. REG00-07 support Read and Write. REG08-0A are read only.
Input Source Control Register REG00 (default 01011000, or 58)
BIT
DESCRIPTION
Bit 7 EN_HIZ
0 – Disable, 1 – Enable
Default: Disable (0)
Input Voltage Limit
Bit 6 VINDPM[3]
Bit 5 VINDPM[2]
640mV
320mV
Offset 3.88V, Range: 3.88V-5.08V
Default: 4.76V (1011)
Bit 4 VINDPM[1] 160mV
Bit 3 VINDPM[0] 80mV
Input Current Limit (Actual input current limit is the lower of I²C and ILIM)
Bit 2
Bit 1
Bit 0
IINLIM[2]
IINLIM[1]
IINLIM[0]
000 – 100mA, 001 – 150mA, 010 – 500mA,
011 – 900mA, 100 – 1A, 101 – 1.5A,
110 – 2A, 111 – 3A
Default SDP: 500mA (010)
Default DCP/CDP: 3A (101)
Default Divider 1 & 2: 2A (110)
Default Divider 3: 1A (100)
SLUSBC1 – SEPTEMBER 2013
Power-On Configuration Register REG01 (default 00011011, or 1B)
BIT
DESCRIPTION
Bit 7 Register Reset
0 – Keep current register setting,
1 – Reset to default
Bit 6 I²C Watchdog
Timer Reset
0 – Normal ; 1 – Reset
Charger Configuration
Bit 5 OTG_CONFIG
0 – OTG Disable; 1 – OTG Enable
Bit 4 CHG_CONFIG
0- Charge Disable; 1- Charge Enable
Minimum System Voltage Limit
Bit 3 SYS_MIN[2]
0.4V
Bit 2 SYS_MIN[1]
0.2V
Bit 1 SYS_MIN[0]
0.1V
Bit 0 Reserved
1 - Reserved
NOTE
Default: Keep current register setting (0)
Note: Register Reset bit does not reset device to default
mode
Default: Normal (0)
Note: Consecutive I2C watchdog timer reset requires
minimum 20uS delay
Default: OTG Enable (1)
Note: OTG_CONFIG would over-ride Charge Enable
Function in CHG_CONFIG
Default: Charge Battery (1)
Offset: 3.0V, Range 3.0V-3.7V
Default: 3.5V (101)
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)
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