BQ25700A Datasheet, PDF (36/82 Pages) Texas Instruments – SMBus Multi-Chemistry Battery Buck-Boost Charge Controller With System Power Monitor and Processor Hot Monitor

bq25700A
SLUSCQ8 – MAY 2017
www.ti.com
Table 10. ChargeOption1 Register (SMBus address = 30h) Field Descriptions (continued)
SMBus
BIT
FIELD
6 CMP_POL
5-4 CMP_DEG
3 FORCE_LATCHOFF
2 Reserved
1 EN_SHIP_DCHG
0 AUTO_WAKEUP_EN
TYPE
R/W
R/W
R/W
R/W
R/W
R/W
RESET DESCRIPTION
0b
Independent Comparator Polarity
Independent comparator output polarity
0b: When CMPIN is above internal threshold, CMPOUT is LOW (internal
hysteresis) <default at POR>
1b: When CMPIN is below internal threshold, CMPOUT is LOW (external
hysteresis)
01b
Independent Comparator Deglitch Time
Independent comparator deglitch time, only applied to the falling edge of
CMPOUT (HIGH → LOW).
00b: Independent comparator is disabled
01b: Independent comparator is enabled with output deglitch time 1 µs <default
at POR>
10b: Independent comparator is enabled with output deglitch time of 2 ms
11b: Independent comparator is enabled with output deglitch time of 5 sec
0b
Force Power Path Off
When comparator triggers, charger turns off Q1 and Q4 (same as disable
converter) so that the system is disconnected from the input source. At the same
time, CHRG_OK signal goes to LOW to notify the system.
0b: Disable this function <default at POR>
1b: Enable this function
0b
Reserved
0b
Discharge SRN for Shipping Mode
When this bit is 1, discharge SRN pin down below 3.8 V in 140 ms. When 140
ms is over, this bit is reset to 0.
0b: Disable shipping mode <default at POR>
1b: Enable shipping mode
1b
Auto Wakeup Enable
When this bit is HIGH, if the battery is below minimum system voltage
(REG0x3E()), the device will automatically enable 128 mA charging current for
30 mins. When the battery is charged up above minimum system voltage, charge
will terminate and the bit is reset to LOW.
0b: Disable
1b: Enable <default at POR>
36
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