Hello!
In a switch mode power supply that you want to protect the (expensive) circuitry hanging off the output, where would one want to place an SCR crowbar for overvoltage protection?
For reference:
**broken link removed**
Do I want to have it short out the output directly (across RL) or short out Vin? The actual circuit I want to protect is only slightly different. "Vin" would be a filter cap, and there would be a fuse before the filter cap. So unfortunately, in either case the cap is going to have to dump it's energy into the SCR.
In a switch mode power supply that you want to protect the (expensive) circuitry hanging off the output, where would one want to place an SCR crowbar for overvoltage protection?
For reference:
**broken link removed**
Do I want to have it short out the output directly (across RL) or short out Vin? The actual circuit I want to protect is only slightly different. "Vin" would be a filter cap, and there would be a fuse before the filter cap. So unfortunately, in either case the cap is going to have to dump it's energy into the SCR.