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Page: technics-physical-computing-P-channel-MOSFETs_en.htm
Date: 2023.11.01 11:53:50 (UTC+1)
Name: Plasmacut
Comment:
Many thanks for this article. It is good explanation for switching FET's
Me: You're welcome!
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Page: technics-physical-computing-P-channel-MOSFETs_en.htm
Date: 2023.05.25 23:42:02 (UTC+1)
Name: AM
Comment:
super thanks!
Me: You're welcome!
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Page: technics-physical-computing-P-channel-MOSFETs_en.htm
Date: 2022.05.29 15:19:03 (UTC+1)
Name: Led Ara
Comment:
Hello,
Thanks for valuable work,
I want to use your schematic in figure-21 to switch a load (e-bike resistive peripheral device) from a 3V3 Ucontroller GPIO.
The Vsupply from e-bike battery is around 48V (38-55V depending on battery charge state).
For 10KOhm R2 and 1KOhm R1 and 48V Vsupply VR2 and Vzener are around 44V which is not safe for P-Channel VGS ? am i missing something ?
Me: To avoid a too high voltage across the Zener diode, there is a voltage divider composed of R1 and R2. To avoid a too high Gate voltage, there is the Zener diode. So the peak voltage on both devices will be no more than 4.8V, which is okay, isn't it?
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Page: technics-physical-computing-P-channel-MOSFETs_en.htm
Date: 2022.05.29 18:09:55 (UTC+1)
Name: Darsh
Comment:
Can you explain how a back to back configuration with a P mosfet stops reverse current flow?
Does it matter if the sources are connected together or if the drains are connected together, to stop reverse flow?
Me: I'll keep that in mind for a future chapter.
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Page: technics-physical-computing-P-channel-MOSFETs_en.htm
Date: 2022.05.29 15:19:03 (UTC+1)
Name: Led Ara
Comment:
Hello,
Thanks for valuable work,
I want to use your schematic in figure-21 to switch a load (e-bike resistive peripheral device) from a 3V3 Ucontroller GPIO.
The Vsupply from e-bike battery is around 48V (38-55V depending on battery charge state).
For 10KOhm R2 and 1KOhm R1 and 48V Vsupply VR2 and Vzener are around 44V which is not safe for P-Channel VGS ? am i missing something ?
Me: To avoid a too high voltage across the Zener diode, there is a voltage divider composed of R1 and R2. To avoid a too high Gate voltage, there is the Zener diode. So the peak voltage on both devices will be no more than 4.8V, which is okay, isn't it?
----------------------------------------------------
Page: technics-physical-computing-P-channel-MOSFETs_en.htm
Date: 2022.05.29 18:09:55 (UTC+1)
Name: Darsh
Comment:
Can you explain how a back to back configuration with a P mosfet stops reverse current flow?
Does it matter if the sources are connected together or if the drains are connected together, to stop reverse flow?
Me: I'll keep that in mind for a future chapter.
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Seite: technics-physical-computing-P-channel-MOSFETs_ge.htm
Datum: 2021.11.19 08:48:57 (UTC+1)
Name: Tobias
Kommentar:
Hallo,
das war die bisher anschaulichste und eingängigste Erklärung, wie ein P-Channel MOSFET in der Praxis funktioniert, die ich online finden konnte, somit hab uch ich das endlich mal verstanden. Danke! Und im Video könnte ja der korrekte Aufbau einer Schaltung verschiedenen "falschen" Aufbauten gegenüber gestellt werden (mit Messungen an relevanten Punkten) und über Gefahren und Fallstricke beim Beschalten eines P-Channel MOSFETs gesprochen werden. Das wäre sicherlich lehrreich für viele.
Me: Bitte gerne und danke für den Vorschlag für's Video!
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Seite: technics-physical-computing-P-channel-MOSFETs_ge.htm
Datum: 2021.02.14 18:30:02 (UTC+1)
Name: Armin
Kommentar:
Das ist eine sehr schöne Übersicht für mich als Nicht-Elekroniker - sehr hilfreich!
Vielen Dank
Me: Bitte gerne!