Nice ! So its working. How many amps are you pulling on those 2 vescs? Are you running 6 oder 12 FETs per Controller?
Many thanks. 
I’ve found an interesting buck ic the u3504d it runs up to 150v, dirt cheap and can even do dual outputs 5v and 12v. It might be possible to simplify the power supply design here and reduce part count.
I’ve written an email to the company since the datasheet is missing the values for current sense resistor, but otherwise it should be pretty capable.
Hi Jens,
Have any luck finding the files for the MESC → FreeDrive port?
Really keen to give this a try. Did you have to change ADC assignments etc, as the schematic looks quite different to say the reference MP2 … by the way, great work on the prop drive …
I‘m still struggling with the power pcb. If I connect a 12V power source to the 12V pin, the 5V circuit works as expected. But connecting 16V to the VIN pin doesn‘t turn on the tx4130 buck converter, even if the two pads on the back of the pcb are shorted.
I also checked the resistors and other components, I didn‘t find any error.
Any ideas?
Ok, looks like I found the problem by accident. There’s no continuity between VIN and VDD of the TX4130. When shorting the two legs, the buck converter turns on and I get 12V as well as 5V.
I don’t really understand, what the intended way of switching the buck converter on and off is, but at least in my case shorting the two pads on the back of the pcb doesn’t seem to be enough.
2 Likes
What if you turn up the voltage on Vin to e.g. 24V. Does that make it work?
No, the input voltage didn’t matter, but I finally was able to make the other 4 PCBs work. I guess the TX4130 was somehow damaged.
1 Like