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BQ24188_15 Datasheet, PDF (35/52 Pages) Texas Instruments – bq24188 2A, 30V, Host-Controlled Single-Input, Single Cell Switchmode Li-Ion Battery Charger with Power Path Management and USB-OTG Support
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bq24188
SLUSC44A – DECEMBER 2014 – REVISED MAY 2015
9.6.7 Safety Timer/ NTC Monitor Register (READ/WRITE)
Memory location: 06, Reset state: 1001 1xx0
Figure 25. Safety Timer/ NTC Monitor Register
B7(MSB)
B6
B5
B4
B3
B2
1
0
0
1
1
X
R/W
R/W
R/W
R/W
R/W
R
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
B1
B0(LSB)
X
0
R
R/W
BIT
B7(MSB)
FIELD
2XTMR_EN
B6
TMR_1
B5
TMR_2
B4
BOOST_ILIM
B3
TS_EN
B2
TS_FAULT1
B1
TS_FAULT0
B0(LSB) VINDPM_OFF
TYPE
R/W
R/W
R/W
R/W
R/W
R
R
R/W
DESCRIPTION
0 – Timer not slowed at any time
1 – Timer slowed by 2x when in thermal regulation, VIN_DPM or input current limit
(default 1)
Safety Timer Time Limit –
00 – 1.25 minute fast charge
01 – 6 hour fast charge
10 – 9 hour fast charge
11 – Disable safety timers (default 00)
0 – 500mA
1 – 1A (Default 1)
0 – TS function disabled
1 – TS function enabled (default 1)
TS Fault Mode:
00 – Normal, No TS fault
01 – TS temp < TCOLD or TS temp > THOT(Charging suspended)
10 – TCOOL > TS temp > TCOLD (Charge current reduced by half)
11 – TWARM < TS temp < THOT (Charge voltage reduced by 100mV)
0 – 4.2V
1 – 10.1V
(Default 0)
BOOST_ILIM Bit (Boost current limit setting)
The BOOST_ILIM bit programs the cycle by cycle current limit threshold for boost operation. The 1 A
setting sets the low side cycle by cycle current limit to 4 A (typ). This ensures that at least 1 A can be
supplied from the boost converter over the entire battery range. The 500 mA setting sets the current limit
to 2 A (typ) to ensure at least 500 mA available from the boost converter. See the Output Over-Current
Protection section for more details.
VINDPM_OFF Bit (VINDPM offset setting)
The VINDPM_OFF bit programs the offset for the VINDPM function. The 4.2 V setting is intended to work
with a standard 5V output adapter. The 10.1 V setting supports 12 V adapters and the 12 V output for the
new USB Power Delivery specification (USB PD).
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