The MAX1908/MAX8724/MAX8765 highly integrated, multichemistry
battery-charger control ICs simplify the construction
of accurate and efficient chargers. These devices use
analog inputs to control charge current and voltage, and
can be programmed by the host or hardwired. The
MAX1908/MAX8724/MAX8765 achieve high efficiency
using a buck topology with synchronous rectification.
The MAX1908/MAX8724/MAX8765 feature input current
limiting. This feature reduces battery charge current when
the input current limit is reached to avoid overloading the
AC adapter when supplying the load and the battery
charger simultaneously. The MAX1908/MAX8724/MAX8765 provide outputs to monitor current drawn from
the AC adapter (DC input source), battery-charging current,
and the presence of an AC adapter. The MAX1908's
conditioning charge feature provides 300mA to safely
charge deeply discharged lithium-ion (Li+) battery packs.
The MAX1908 includes a conditioning charge feature
while the MAX8724/MAX8765 do not.
The MAX1908/MAX8724/MAX8765 charge two to four
series Li+ cells, providing more than 5A, and are available
in a space-saving, 28-pin, thin QFN package (5mm x 5mm). An evaluation kit is available to speed designs.
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