BQ25700A Datasheet, PDF (49/82 Pages) Texas Instruments – SMBus Multi-Chemistry Battery Buck-Boost Charge Controller With System Power Monitor and Processor Hot Monitor

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bq25700A
SLUSCQ8 – MAY 2017
Table 26. Charge Current Register (14h) With 10-mΩ Sense Resistor (SMBus address = 14h) Field
Descriptions (continued)
SMBus
BIT
6
FIELD
Charge Current, bit 0
5-0 Reserved
TYPE
R/W
R/W
RESET
0b
000000b
DESCRIPTION
0 = Adds 0 mA of charger current.
1 = Adds 64 mA of charger current.
Not used. Value Ignored.
8.6.3.1 Battery Pre-Charge Current Clamp
During pre-charge, BATFET works in linear mode or LDO mode (default REG0x12[2] = 1). For 2-4 cell battery,
the system is regulated at minimum system voltage in REG0x3E() and the pre-charge current is clamped at 384
mA. For 1 cell battery, the pre-charge to fast charge threshold is 3 V, and the pre-charge current is clamped at
384 mA. However, the BATFET stays in LDO mode operation till battery voltage is above minimum system
voltage (~3.6 V). During battery voltage from 3 V to 3.6 V, the fast charge current is clamped at 2 A.
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