BQ25700A Datasheet, PDF (38/82 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 12. ChargeOption2 Register (SMBus address = 31h) Field Descriptions
SMBus
BIT
FIELD
7
EN_EXTILIM
6
EN_ICHG
_IDCHG
5
Q2_OCP
4
ACX_OCP
3
EN_ACOC
2
ACOC_VTH
1
EN_BATOC
0
BATOC_VTH
TYPE
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RESET
1b
0b
1b
1b
0b
1b
1b
1b
DESCRIPTION
Enable ILIM_HIZ pin to set input current limit
0b: Input current limit is set by REG0x3F.
1b: Input current limit is set by the lower value of ILIM_HIZ pin and
REG0x3F. <default at POR>
0b: IBAT pin as discharge current. <default at POR>
1b: IBAT pin as charge current.
Q2 OCP threshold by sensing Q2 VDS
0b: 210 mV
1b: 150 mV <default at POR>
Input current OCP threshold by sensing ACP-ACN.
0b: 280 mV
1b: 150 mV <default at POR>
ACOC Enable
Input overcurrent (ACOC) protection by sensing the voltage across
ACP and ACN. Upon ACOC (after 100-µs blank-out time), converter is
disabled.
0b: Disable ACOC <default at POR>
1b: ACOC threshold 125% or 200% ICRIT
ACOC Limit
Set MOSFET OCP threshold as percentage of IDPM with current
sensed from R_AC.
0b: 125% of ICRIT
1b: 200% of ICRIT <default at POR>
BATOC Enable
Battery discharge overcurrent (BATOC) protection by sensing the
voltage across SRN and SRP. Upon BATOC, converter is disabled.
0b: Disable BATOC
1b: BATOC threshold 125% or 200% PROCHOT IDCHG <default at
POR>
Set battery discharge overcurrent threshold as percentage of
PROCHOT battery discharge current limit.
0b: 125% of PROCHOT IDCHG
1b: 200% of PROCHOT IDCHG <default at POR>
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