I am trying to harvest energy from 2 energy sources ( Vout adjustable from 3 to 5V) to power a single battery (3.6V Li-Ion/ NiMH). I want to be able to draw power from both even if one sources output voltage is lower than that of the other source. Schottky Diode ORing with series resistors will dissipate lot of power. Any other alternatives? Please also look at the attachment.
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