Datasheet
bq24160, bq24160A
bq24161, bq24161B
bq24163, bq24168
www.ti.com
SLUSAO0E –NOVEMBER 2011–REVISED NOVEMBER 2013
Safety Timer/ NTC Monitor Register (READ/WRITE)
Memory location: 07, Reset state: 1001 1xxx
BIT NAME Read/Write FUNCTION
B7 (MSB) 2XTMR_EN Read/Write 1 – Timer slowed by 2x when in thermal regulation, input current limit, V
IN_DPM
or
DPPM
0 – Timer not slowed at any time (default 0) (bq24160/1 only)
B6 TMR_1 Read/Write Safety Timer Time Limit –
00 – 27 minute fast charge
B5 TMR_2 Read/Write
01 – 6 hour fast charge
10 – 9 hour fast charge
11 – Disable safety timers (default 00) (bq24160/1 only)
B4 NA Read/Write NA
B3 TS_EN Read/Write 0 – TS function disabled
1 – TS function enabled (default 1)
B2 TS_FAULT1 Read only TS Fault Mode:
00 – Normal, No TS fault
B1 TS_FAULT0 Read only
01 – TS temp < T
COLD
or TS temp > T
HOT
(Charging suspended)
10 – T
COOL
> TS temp > T
COLD
(Charge current reduced by half, bq24160 only)
11 – T
WARM
< TS temp < T
HOT
(Charge voltage reduced by 140mV, bq24160 only)
B0 (LSB) LOW_CHG Read/ Write 0 – Charge current as programmed in Register 0x05
1 – Charge current is half programmed value in Register 0x05
(default 0)
2xTMR_EN Bit (2x Timer Enable)
The 2xTMR_EN bit is used to slow down the timer when charge current is reduced by the system load.
When 2xTMR_EN is a "1", the safety timer is slowed to half speed effectively doubling the timer time.
The conditions that activate the 2x timer are: Input Current Limit, V
INDPM
, Thermal Regulation,
LOW_CHG, BATSHRT and TS Cool. When 2xTMR_EN is a "0", the timer operates at normal speed in
all conditions.
LOW_CHG Bit (Low Charge Mode Enable)
The LOW_CHG bit is used to reduce the charge current from the programmed value. This feature is
used by systems where battery NTC is monitored by the host and requires a reduced charge current
setting or by systems that need a “preconditioning” current for low battery voltages. Write a “1” to this
bit to charge at half of the programmed charge current (bq24160/1/3/8). Write a “0” to this bit to charge
at the programmed charge current.
Copyright © 2011–2013, Texas Instruments Incorporated Submit Documentation Feedback 33
Product Folder Links: bq24160 bq24160A bq24161 bq24161B bq24163 bq24168