Status
Active: In Production.
Description
The MAX1909 evaluation kit (EV kit) is an accurate and
efficient multichemistry battery charger. The EV kit can
charge three or four series Li+ cells with a current up to
3A. Charge current and input-source current are
adjustable using on-board potentiometers. The output
voltage is set to 4.2V x the number of series cells in the
battery pack. The number of series cells is jumper-selectable.
The output voltage is adjustable between
4V to 4.4V (x number of series cells) by installing two
resistors. The EV kit provides outputs to monitor the AC
adapter current and the presence of an AC adapter.
The MAX1909 automatically selects the power path for
supplying power to the system by controlling two external
P-channel MOSFETs. This decision is made based
on the presence of an AC adapter.
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