Hi, a newbie here. I am starting to create more complex designs in KiCad.
I am making an add-on card for STM32 Nucleo board. I figured it would be a good idea to have an extra regulator on the add-on card in case Nucleo cannot provide sufficient power.
In my add-on card, I will be getting one power supply from the Nucleo’s out, and then my own regulator setup. Now I have two options for designing the power distribution -
- Provide a jumper to choose between the active power source - either the supply from Nucleo or the additional regulator (connected to battery with charger IC). This way only one of the power source will be used within the addon card.
- Connect the second power source from regulator in parallel with the output from Nucleo board. This way I can choose to connect the battery in case I feel more power is needed.
I think the second one is a better choice. But either way, are there any special considerations while designing them ?
If I choose the first method, how do I implement power domain isolation? Should I create new power symbols like 3.3v_A, 3.3v_B etc or does there exist some smarted way to deal with it ?