eBay TB6560 Stepper Motor Driver Boards

[Mad Professor]

Here is a pic of what is left of the chip.



My 36vdc PSU is not adjustable.

I now need to start looking at ways to limited the voltage and spikes.

I was looking at using a zener diode and Metal Oxide Varistor to deal with the spikes.

But I still have to look into it more.

[irving2008]

Thats pretty impressive... any collateral damage as far as you can tell? I'd strip the chip off the board and then retest on the 13v supply and confirm other voltages are as expected...output of regs, logic levels, etc. and compare the voltages on equivalent pins of the remaining drivers - without motors attached.

No point in replacing it if there is more damage...

Alternatively you could send it back...

[Mad Professor]

I have removed the damaged chip, and have powered it using my adjustable bench PSU, all the lights came on, no more smoke.

So it looks like only the one chip got damaged.