Before messing up soldering into a custom pcb, I want to test the BQ25504 with discrete components, and in a more debuggable way (is a relatively expensive IC for a student), for that reason I have sketched a couple of breakout boards and ordered it to OSHPARK

I have also made another for the TPS82740B, which is packed in a solder ball package

BQ25504:

Front PCB:

Back PCB:

I added the thermal pad as an extra pin, for testing purposes.

TPS82740B:

Front PCB:

Back PCB:

Both breakout boards are in the download section