Is there a circuit for this thread? Ild like to look at it myself when i get home.
On Wed, Feb 5, 2025 at 3:41 PM, jerzy przezdziecki via groups.io
<jprzezdziecki@...> wrote:
I can imagine that crowbar is much better, but I would not be afraid about transients. This chip is extremally fast, a few ns. So ¨C as you said ¨C the TLV1805 is made for this purpose.
Jurek
?
I understand that overvoltage protection (OVP) must be a very simple and reliable circuit.
I've had a lot of problems with this circuit because sudden load variations can cause transients in the output voltage and reach high values triggering the triac! That's terrible.
Extreme situations can generate noise and lead to malfunctioning protection circuits.
My overvoltage detection, for this reason, is done by simple zener diodes and only components like the TLV1805 are suitable, as they have been designed for this purpose.
Because of these problems, in one specific case I used a microcontroller to trigger the crowbar. The microcontroller was able to distinguish between an overvoltage and a transient.
