BQ25708 datasheet(36/77 Pages) TI2

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bq25708

SLUSCU2 – NOVEMBER 2017

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Table 12. ChargeOption2 Register (SMBus address = 31h) Field Descriptions

SMBus

BIT

FIELD

TYPE

RESET

DESCRIPTION

EN_EXTILIM

R/W

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>

EN_ICHG

_IDCHG

R/W

0b: IBAT pin as discharge current. <default at POR>

1b: IBAT pin as charge current.

Q2_OCP

R/W

Q2 OCP threshold by sensing Q2 VDS

0b: 300 mV

1b: 500 mV <default at POR>

ACX_OCP

R/W

Input current OCP threshold by sensing ACP-ACN.

0b: 150 mV

1b: 280 mV <default at POR>

EN_ACOC

R/W

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_VTH

R/W

ACOC Limit

Set MOSFET OCP threshold as percentage of IDPM with current

sensed from RAC.

0b: 125% of ICRIT

1b: 200% of ICRIT <default at POR>

EN_BATOC

R/W

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>

BATOC_VTH

R/W

Set

battery

discharge

overcurrent

threshold

percentage

PROCHOT battery discharge current limit.

0b: 125% of PROCHOT IDCHG

1b: 200% of PROCHOT IDCHG <default at POR>

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