Datasheet

bq24270
bq24271
www.ti.com SLUSB10 –JUNE 2012
Battery Termination and Fast Charge Current Register (READ/WRITE)
Memory location: 05, Reset state: 0011 0010
BIT NAME Read/Write FUNCTION
B7(MSB) NA Read/Write NA
B6 I
CHRG3
Read/Write Charge current: 600 mA— (default 0)
B5 I
CHRG2
Read/Write Charge current: 300 mA—(default 1)
B4 I
CHRG1
Read/Write Charge current: 150 mA— (default 1)
B3 I
CHRG0
Read/Write Charge current: 75 mA (default 0)
B2 I
TERM2
Read/Write Termination current sense voltage: 200 mA (default 0)
B1 I
TERM1
Read/Write Termination current sense voltage: 100 mA (default 1)
B0(LSB) I
TERM0
Read/Write Termination current sense voltage: 50 mA (default 0)
Charge current sense offset is 550 mA and default charge current is 1000 mA
Termination threshold offset is 50 mA and default termination current is 150 mA
V
IN-DPM
Voltage and DPPM Status Register
Memory location: 06, Reset state: xx00 0000
BIT NAME Read/Write FUNCTION
1—Minimum System Voltage mode is active (low battery condition)
B7(MSB) MINSYS_STATUS Read Only
0—Minimum System Voltage mode is not active
1—V
IN-DPM
mode is active
B6 DPM_STATUS Read Only
0—V
IN-DPM
mode is not active
B5 V
INDPM2(USB)
Read/Write USB input V
IN-DPM
voltage: 320mV (default 0)
B4 V
INDPM1(USB)
Read/Write USB input V
IN-DPM
voltage: 160mV (default 0)
B3 V
INDPM0(USB)
Read/Write USB input V
IN-DPM
voltage: 80mV (default 0)
B2 NA Read/Write NA
B1 NA Read/Write NA
B0(LSB) NA Read/Write NA
V
IN-DPM
voltage offset is 4.20 V and default V
IN-DPM
threshold is 4.20 V
Safety Timer and NTC Monitor Register (READ/WRITE)
Memory location: 07, Reset state: 1001 1xxx
BIT NAME Read/Write FUNCTION
1 – Timer slowed by 2x when in thermal regulation, input current limit, V
IN_DPM
B7(MSB) 2XTMR_EN Read/Write or DPPM
0 – Timer not slowed at any time (default 0)
B6 TMR_1 Read/Write Safety Timer Time Limit –
00 – 27 minute fast charge
01 – 6 hour fast charge
B5 TMR_2 Read/Write
10 – 9 hour fast charge
11 – Disable safety timers (default 00)
B4 NA Read/Write NA
0 – TS function disabled
B3 TS_EN Read/Write
1 – TS function enabled (default 1)
B2 TS_FAULT1 Read only TS Fault Mode:
00— Normal, No TS fault
01— TS temp < T
COLD
or TS temp > T
HOT
(Charging suspended)
10— T
COOL
> TS temp > T
COLD
(Charge current reduced by half, bq24270 only)
B1 TS_FAULT0 Read only
11— T
WARM
< TS temp < T
HOT
(Charge voltage reduced by 140 mV, bq24270
only)
0 – Charge current as programmed in Register 0x05
B0(LSB) LOW_CHG Read/ Write
1 – Charge current is half programmed value in Register 0x05 (default 0)
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