I am currently using the TMC603 to evaluate the use of brushless motors in an industrial application. I created my own board for this application, but I am currently encountering a severe issue with the charge pump circuit. I used the circuit example in the datasheet. It seems I can't attach it to this post from my computer but I will gladly send you screenshots and oscilloscope measurements by email. The issue is that if I connect the double diode (I used a BAV99) a shortcircuit happens. I tried to replace it with two normal diodes, but whenever I connect the upper one (the one connected to VCP) nothing works anymore.If I don't connect this diode then everything else works but the TMC remains in error mode because the charge pump voltage is not generated.
For information, I am using a 24V DC supply and I didn't use the optional filter connected to VCP.