Today I laid out a board in record time: 2.5 hours! And, its even a motor drive! However, I did cheat a bit and use a daughter board. My work was throwing out several DRV8305 evaluation boards, which are more or less the same as the lovely DRV8323RS TI motor driver we’ve all come to love. The “throwing out several” part is important, because if I blow up the power stage, I can simply swap my daughter board with minimal effort..

The evaluation board in question:

My daughter board design:

At the heart of the design is the new STM32G431 chip, my new favorite micro. The connectors, from left to right, are: encoder 1, encoder 2, random analog i/os, and a SPI broken out. The connector in the center is a USART for data logging.

Hopefully it works!