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FrozenGate by Avery

LM317/LM338 2x 16850 voltage not enough?

Thanks for the replies. I checked my wiring again and I just found out that lm338 Tab is touching the heatsink, my ndb7875 diode is also on the same heatsink. Is the diodes housing(dunno what to call) connected to diodes circuit? :(
 





Enough charge on the capacitor can blow
away the bond wires and cause the diode to
go open circuit. I hope that is not the
case.
 
My lm338 is also damaged, its not regulating current, it killed my diode. Is there a way to make the current stop flowing when regulator is damaged? Is it ok to add fuse at the output?
 
bakulaw said:
My lm338 is also damaged, its not regulating current, it killed my diode. Is there a way to make the current stop flowing when regulator is damaged? Is it ok to add fuse at the output?
Click to expand...

By the time a fuse blows, the damage has
already been done. There isn't really a
way without a significant increase in
complexity.
 
Hmmm. Are there fake lm338s/lm317? I bought this on ebay. I already damaged a few. lm338 cant give more than 1.8A, i thought it has thermal protection but mine sometimes die instantly. I think my wiring is correct since its working fine around 1A. Thanks all for your time.
 
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