Timeline for Diode with an enabler function
Current License: CC BY-SA 3.0
14 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 1, 2017 at 0:38 | answer | added | Bradman175 | timeline score: 0 | |
| Dec 31, 2016 at 11:32 | answer | added | Spehro 'speff' Pefhany | timeline score: 2 | |
| Dec 31, 2016 at 10:26 | comment | added | Jyrki | The leakage current does not play a major role in this case. | |
| Dec 31, 2016 at 10:22 | comment | added | Bradman175 | In its off state, I'm guessing you want a very low leakage current, because the fet or mosfet configuration would have quite a significant leakage current. | |
| Dec 31, 2016 at 9:41 | comment | added | Jyrki | Here are the timings: enable signal goes up (t=0), diode is enabled (t=100 ns). Same for the other direction (disabled->enabled)).Diode speed could be similar to, for example, speeds of typical power Mosfet body diodes. This is analogue switched mode power supply project. | |
| Dec 31, 2016 at 9:34 | comment | added | Bradman175 | Could you be more specific about speed here? It seems like switching time is a big concern here. Are you dealing with logic or analogue? | |
| Dec 31, 2016 at 9:31 | comment | added | Jyrki | No, any fast enough diode will work. In fact, I do not need diode, but I need diode-like function, when enabled and high impedance when disabled. | |
| Dec 31, 2016 at 9:28 | comment | added | Bradman175 | Do you need to use the specific diode you have? | |
| Dec 31, 2016 at 9:24 | comment | added | Jyrki | Thanks for quick comments. I need speed, to the tune of microseconds, thus SCR and relay will not work. This idea of diode/single Mosfet might be workable, even though gate drive creates tough challenge. | |
| Dec 31, 2016 at 9:15 | comment | added | Bradman175 | If timing is not a problem, get a relay. Or you could possibly replace the diode with a SCR, but you'll have the issue with its latching characteristic and it seems you do not want to remove the diode. | |
| Dec 31, 2016 at 9:15 | comment | added | Jasen Слава Україні | one diode + one mosfet will work, there's a diode blocking current in the other direction. | |
| Dec 31, 2016 at 9:14 | comment | added | Tom Carpenter | You don't need the diode in that circuit. Two back to back NMOS MOSFETs will do. But you need to get the gate drive voltages correct. | |
| Dec 31, 2016 at 9:14 | comment | added | Jasen Слава Україні | what about an SCR ? | |
| Dec 31, 2016 at 9:09 | history | asked | Jyrki | CC BY-SA 3.0 |