bq25504 dual energy sources

Ami Oz

Other Parts Discussed in Thread: BQ25504

Hello

what is the best way ( Efficient and low-cost) to combine two low-voltage (<200mV) harvesting sources into one battery charger (i guess it will be bq25504) ?

load is 3.3v , low-power (less than 10mA)

Thanks

over 13 years ago

0 Charles Mauney over 13 years ago

TI__Mastermind 31120 points

Yes this would be a good choice, assuming the sources are "current sources" that can be tied together.

0 Ami Oz over 13 years ago in reply to Charles Mauney

Prodigy 135 points

Thanks charles

issue is that the two sources are different and their availability is random. im not sure if simple oring of the sources if possible and adding diodes is not an option due to the low voltages of the sources.

it is not the same but similar to a mix of solar and kinetic sources which charge same cell.

Thanks

0 Charles Mauney over 13 years ago in reply to Ami Oz

TI__Mastermind 31120 points

Most likely you will have to use diodes to combine the two sources if they are different, possibly use FET that can be turned off if reverse biased.

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bq25504 dual energy sources