Timeline for Protecting BJTs from overvoltage
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 14, 2020 at 21:26 | comment | added | Bimpelrekkie | should I use triac or thyristor? Look up the difference between an TRIAC and a Thyristor. Then search for circuits: "TRIAC circuit" and "Thyristor circuit" and pay attention to what these devices are used for. Hint: it has to do with AC and DC. Stop "blindly" asking "should I use ..." and "can I use ..." without doing ANY prior research. We're not here to explain you the basics that can be found easily if you just look for them. If you show you've done your (re)search you'll get much better answers. | |
| Nov 14, 2020 at 17:05 | comment | added | Andy aka | You can implement a potential divider that protects the TL431 at higher voltages or use a zener diode to act as a shunt as shown in the link earlier on. | |
| Nov 14, 2020 at 17:04 | history | edited | Andy aka | CC BY-SA 4.0 |
added 199 characters in body
|
| Nov 14, 2020 at 16:41 | comment | added | ElectronSurf | @Bimpelrekkie I want to use a comparator because TL431 can only set the voltage up to 36V, I have the supply in the circuit that is independent of the input voltage to supply the comparator, any advice on that? also should I use triac or thyristor? thanks. | |
| Nov 14, 2020 at 16:35 | comment | added | Bimpelrekkie | Can I use an op amp to trigger the thyristor/triac? 1) You shouldn't be using an opamp but a comparator. 2) Why would you want to use an opamp/comparator when this circuit does the trick? 3) Don't ask: "Can I..." because when in a "silly" mood I could answer: "I can but I don't know if you can." or "Not if you don't have an opamp." A better question would be: "I would like to use an opamp to trigger the thyristor, are there any (dis)advantages in doing that?" Focus on why instead of "can I". | |
| Nov 14, 2020 at 16:02 | comment | added | ElectronSurf | Last question; Can I use an op amp to trigger the thyristor/triac? | |
| Nov 14, 2020 at 15:50 | vote | accept | ElectronSurf | ||
| Nov 14, 2020 at 15:46 | history | answered | Andy aka | CC BY-SA 4.0 |