Timeline for Can I drive MOSFET gate with an isolated voltage source?
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 6, 2017 at 6:02 | comment | added | Chupacabras | Voltage sources Vg and Vs are not electrically isolated from each other. | |
| Feb 6, 2017 at 1:00 | comment | added | Sam | Body diodes tend to end up in the opposite direction to normal current flow in a lot of (but not all) MOSFET circuits, so unless you're careful, you might find that you end up with basically a diode that conducts in a direction other than the one you want, so you either have power flowing through the diode or through the diode and the switch (this is the result when building MOSFET 'ideal diode' circuits) | |
| Feb 5, 2017 at 19:27 | comment | added | hkBattousai | @pjc50 Are you sure about the voltage drop and power loss? When the MOSFETs are off, there will no current flowing, thus no power loss. When the they are on, the channel of the MOSFETs will short their body diodes, so there will be at least theoretically zero voltage drop. | |
| Feb 5, 2017 at 18:11 | comment | added | pjc50 | I'm not sure what properties they have, especially durability, and they'll give you 0.7V of voltage drop and power dissipation. | |
| Feb 5, 2017 at 18:06 | comment | added | hkBattousai | @pjc50 Yes, I'm relying on the body diodes. Shouldn't I rely on them? | |
| Feb 5, 2017 at 18:03 | vote | accept | hkBattousai | ||
| Feb 5, 2017 at 14:25 | answer | added | Akash Neel Dey EEE | timeline score: 1 | |
| Feb 5, 2017 at 14:06 | answer | added | user4574 | timeline score: 1 | |
| Feb 5, 2017 at 13:53 | comment | added | pjc50 | What matters is the voltage between the channel and the source. Are you relying on the body diodes though? | |
| Feb 5, 2017 at 13:40 | history | edited | hkBattousai | CC BY-SA 3.0 |
added 105 characters in body
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| Feb 5, 2017 at 13:35 | history | asked | hkBattousai | CC BY-SA 3.0 |