I'm engaged with the design stage of a standalone device powered by a solar cell and a battery. Due to technical and energetic reasons, I have to use a 0.7Wp single cell (no load voltage is about 0.55V at 25°C). In anyway,the cellwill never work at itspeak power: the maximum power producedby thesolar cellwill never exceedmore than 600mW.
I would like to use the BQ25504 integrated circuit because it has all the features I need, but its power stage is "limited" to a peak power of 400 mW.
Is it possible to reply the power stage of BQ25504 with discretelow on resistance MOSFETs - driven by using BQ25504 terminals like LBST, VSTOR, VBAT - in order to improve current capability of the power stage?
Thank you for any help youcan giveme.