Found it! And none of the suggestions helped. It drove me quite crazy. And then I discovered somebody else with similar problems: [giantpong.wordpress.com]. And it gave me a clue. But what caused it?
Actually I was punished for being greedy. I bought 5 TB6560AHQ’s from eBay (from GC_Supermarket). After reading the website above, I checked all my TB6560AHQ’s. They all gave a zero ohm reading between pin 1 and 17. Something which isn’t possible with genuine parts. (Always check the data sheet!)
After my discovery I bought 5 pcs from greenhouse408 on eBay. Directly after buying, I checked the pin 1/pin 17 reading, and it showed nearly unlimited resistance. Got it! Genuine TB6560AHQ’s!
Now I can finally continue testing my board! In the mean time I made the board a little more rugged, by adding some very cheap decoupling capacitors and some other stability stuff (connections to earth of unused connections etc.).
Actually I was punished for being greedy. I bought 5 TB6560AHQ’s from eBay (from GC_Supermarket). After reading the website above, I checked all my TB6560AHQ’s. They all gave a zero ohm reading between pin 1 and 17. Something which isn’t possible with genuine parts. (Always check the data sheet!)
After my discovery I bought 5 pcs from greenhouse408 on eBay. Directly after buying, I checked the pin 1/pin 17 reading, and it showed nearly unlimited resistance. Got it! Genuine TB6560AHQ’s!
Now I can finally continue testing my board! In the mean time I made the board a little more rugged, by adding some very cheap decoupling capacitors and some other stability stuff (connections to earth of unused connections etc.).