| ??? 12/14/05 22:36 Read: times |
#105248 - High performance power FET? Responding to: ???'s previous message |
Andy Neil said:
Erik Malund said: (my emphasis)
If you switch after the regukator there are not many, if any, options beyond a relay that will not lead to a problematic voltage drop. Andrej Novak said:
Well, i think it does not matter where i switch power off. Before or after regulator. Yes it does - for the reason Erik stated (and I've highlighted above) I agree that the problem of post-regulator voltage drop could be a a big problem. However, wouldn't a large power MOSFET do the trick? I seem to recall these being available with RDS(on) of 10 milliohms and lower. For moderate currents, this should translate into a very small voltage drop. --Sasha Jevtic |
| Topic | Author | Date |
| Connecting to power | 01/01/70 00:00 | |
| many possibilities if you switch before | 01/01/70 00:00 | |
| do you mean 7805? | 01/01/70 00:00 | |
| many | 01/01/70 00:00 | |
| before or after regulator | 01/01/70 00:00 | |
| High performance power FET? | 01/01/70 00:00 | |
| maybe, maybe not | 01/01/70 00:00 | |
| Not quite | 01/01/70 00:00 | |
| Misunderstanding? | 01/01/70 00:00 | |
| Not true either | 01/01/70 00:00 | |
| Examples? | 01/01/70 00:00 | |
| IRF has a pageful of them | 01/01/70 00:00 | |
| Ok, maybre I was not clear, but correct | 01/01/70 00:00 | |
| Ehm, no | 01/01/70 00:00 | |
| which I also covered | 01/01/70 00:00 | |
| Well | 01/01/70 00:00 | |
| (not so) recent knowledge | 01/01/70 00:00 | |
| Even the voltage! | 01/01/70 00:00 | |
| LM317 | 01/01/70 00:00 | |
| NMOS? | 01/01/70 00:00 | |
| IRF got those too | 01/01/70 00:00 | |
| Of course... | 01/01/70 00:00 | |
Load switching? | 01/01/70 00:00 |