All I have as far as SMD diode parts go are various zener diodes. In particular, these are all I have: **broken link removed**
As you can understand, I'm a beginner when it comes to repairs of SMD stuff, I guess I should spend my time in a better way than attempting to repair that PSU but I want to do it. It is my own device, and I don't intend to assemble it fully and run it permanently with a non-optimal part that may be a hazard. But if I could just use something and at least test it to see if it is working, then I can always order what it actually should have and replace that final part before it put it back together. Or would it be fine to use one of the zener diodes that I have? What voltage should I use in that case?
hi,
IMO a fast switching signal diode is required, in order to quickly discharge the MOSFET Gate capacitor.
Zener diodes are inherently slow and 'soft' and are not suitable for this repair.
If you have access to any scrapped electronic modules, you should be able recover a suitable signal diode
E
The link you mentioned is for SMD resistors. I hope you don't think resistors and Zener diodes are the same thing...
In any case, you could probably just leave the diode and the resistor out -- the datasheet for the L6561 shows neither on that pin in the applications notes. It looks like the gate driver circuit in the L6561 would make anything else redundant.