Electronics > Beginners

MOSFET reverse polarity protection + crowbar circuit combined

(1/1)

Zhenek:
I'm trying to combine two well known circuits, one is reverse polarity protection with MOSFET, another is crowbar circuit against overvoltage. Before trying to make the real circuit on the breadboard, I've decided to simulate it in TINA. However, I can't make it working. Separately both snippets work. Below is schematic and simulation result. It seems that SCR is always on for the reason I cannot explain.
In real application I supposed to place a fuse where ammeter is on my schematics. Zeners are rated 15V.
What am I doing wrong?

Zhenek:
Ok, changing SCR to TRIAC makes all the difference, now it's working as expected. Still I cannot explain, any ideas?

Navigation

[0] Message Index

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod