Hello,
In a previous question, BQ25570: Multiple device with Single Storage element, it was established multiple BQ25570's can be used in parallel to charge a storage device.
However, user Ricardo notes that the output of the BQ25570 buck regulators should NOT be connected. Why is this the case?
Background:
I would like to have more headroom above the ~100mA output capability of the BQ25570 buck regulator for the VOUT 3.3V rail I am using to power a microcontroller + sensors. While I'm at it, it would also be nice to charge the battery at a faster rate than 100mA. Therefore, since I have multiple solar panel boards I am working with, it seems natural to give each panel its own BQ25570 charging + output circuit. That is: connect the VBAT pins together and the VOUT pins together of multiple BQ25570.
Is there something flawed with this approach?