BQ24725A_17 Datasheet, PDF (13/47 Pages) Texas Instruments – 1-4 Cell Li+ Battery SMBus Charge Controller with N-Channel Power MOSFET Selector and Advanced Circuit Protection

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8 Detailed Description
bq24725A
SLUSAL0A – SEPTEMBER 2011 – REVISED AUGUST 2014
8.1 Overview
The bq24725A is a 1-4 cell battery charge controller with power selection for space-constrained, multi-chemistry
portable applications such as notebook and detachable ultrabook. It supports wide input range of input sources
from 4.5V to 24V, and 1-4 cell battery for a versatile solution.
The bq24725A supports automatic system power source selection with separate drivers for n-channel MOSFETS
on the adapter side and battery side.
The bq24725A features Dynamic Power Management (DPM) to limit the input power and avoid AC adapter over-
loading. During battery charging, as the system power increases, the charging current will reduce to maintain
total input current below adapter rating.
The SMBus controls input current, charge current and charge voltage registers with high resolution, high
accuracy regulation limits.
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