BQ24257 Datasheet, PDF (32/45 Pages) Texas Instruments – 2A Single Input I2C, Standalone Switch-Mode Li-Ion Battery Charger with Integrated Current Sense Resistor

bq24257
bq24258
SLUSBG0B – FEBRUARY 2013 – REVISED JULY 2013
Register #6
Memory location: 05, Reset state: 101x 1xxx
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BIT
NAME
Read/Write
FUNCTION
B7(MSB) 2XTMR_EN Read/Write 0 – Timer not slowed at any time
1 – Timer slowed by 2x when in thermal regulation, VIN_DPM or DPPM (default 1)
B6
TMR_1
Read/Write Safety Timer Time Limit
B5
TMR_2
Read/Write ^{00 – 0.75 hour fast charge}
01 – 6 hour fast charge (Default 01)
10 – 9 hour fast charge
11 – Disable safety timers
B4
SYSOFF Read/Write 0 – SYSOFF disabled
1 – SYSOFF enabled
B2
B1
B0(LSB)
TS_STAT2
TS_STAT1
TS_STAT0
Read only
Read only
Read only
TS Fault Mode:
000 – Normal, No TS fault
100 – TS temp < T_COLD (Charging suspended for JEITA and Standard TS)
101 – T_FREEZE < TS temp < T_COLD (Charging at 3.9V and 100mA and only for PSE option
only)
110 – TS temp < T_FREEZE (Charging suspended for PSE option only)
111 – TS open (TS disabled)
• 2xTMR_EN – When set to a ‘0’, the 2x Timer function is enabled and allows for the timer to be extended if a
condition occurs where the charge current is reduced (that is, _{VIN_DPM}, thermal regulation, and so on). When
set to a ‘1’, this function is disabled and the normal timer will always be executed independent of the current
reduce conditions.
• SYSOFF – When set to a ‘1’ and the input is removed, the internal battery FET is turned off in order to reduce
the leakage from the BAT pin to less than 1µA. Note that this disconnects the battery from the system. When
set to a ‘0’, this function is disabled.
• TS_EN – Enables and disables the TS function. When set to a ‘1’ the TS function is disabled otherwise it is
enabled. Only applies to spins that have a TS pin.
• TS_STAT – Provides status of the TS pin state for spins that have a TS pin.
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