I would like to know if there are any complications in paralleling 1 - 4 BQ24650 outputs to obtain a higher charge rate into li-poly or li-ion cell packs.
Hi Barry,
There will be no problems, make sure the layout is optimized to reduce noise:
If using only one solar panel, or multiple solar panels with bypass diode, connected in parallel: Use the same MPPSET signal for all ICs (use the same resistor divider for all of them). Only one reverse blocking diode and input filter is necessary (no need to duplicate on all the ICs).
If using multiple solar panels at different angles, not connected in parallel: Use separate MPPSET resistor divider for each solar panel + charger IC. Provide reverse blocking diode and input filter on each charger IC input.
One thing to take note is that because you are using multiple chargers and high charge currents, you may run into thermal issues. Be sure to provide enough copper pour and thermal vias to dissipate heat on the board.
Regards,
Steven
