Timeline for Level translation from +5V (square wave at 200 kHz) to +12V using IRF540N
Current License: CC BY-SA 4.0
13 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 27 at 5:21 | vote | accept | Technaut | ||
| Mar 26 at 17:54 | comment | added | Technaut | Thanks @ChesterGillon for the suggestion. I will try simulating it and I have to see if the part is available in my town. | |
| Mar 26 at 17:47 | comment | added | MOSFET | @Technaut What's the sensor PN? | |
| Mar 26 at 17:44 | comment | added | Technaut | Thanks @MOSFET for highlighting it. Initially I was planning to use FDT439N but due to unavailability, I thought of using IRF540N. Can you please suggest if FDT439N would be best suited for my application as I don't want to high-current to drive my sensor. Moreover little bit out of context from this question, I tried using TL074 opamp for this application but it has a slew rate of 20V/us. But then I realised an opamp with slew rate >240V/us would be a good match. Is it possible to comment on this? | |
| Mar 26 at 17:14 | comment | added | MOSFET | @Technaut your MOSFET selection is super over-kill for your application; I was anticipating a high-current load on the output. Post the sensor that needs that clock input spec. What I presented is a high-power level translator. | |
| Mar 26 at 17:09 | comment | added | Technaut | @MOSFET basically it is driving a sensor which requires 12V to 0.5V logic clock to drive the digital elements | |
| Mar 26 at 16:29 | answer | added | Andy aka | timeline score: 0 | |
| Mar 26 at 16:14 | comment | added | Chester Gillon | As noted in the answer the gate charge is an issue. The IRF540N is a designed for switching 33 A and has a typical input capacitance of 1960 pF. Since this is for a level translation, perhaps a lower current device such as a LND150 N-Channel Depletion-Mode DMOS FET with a reduced input capacitance of 7.5 pF (typical) would give faster edges. Posting a comment as haven't tried simulating it. | |
| Mar 26 at 16:06 | history | edited | Transistor | CC BY-SA 4.0 |
added 22 characters in body; edited title
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| Mar 26 at 16:02 | comment | added | MOSFET | Is there a particular reason you want the translation range from 12V to 0.5V instead of 12V to 0V? | |
| Mar 26 at 16:00 | answer | added | MOSFET | timeline score: 1 | |
| S Mar 26 at 15:42 | review | First questions | |||
| Mar 26 at 16:09 | |||||
| S Mar 26 at 15:42 | history | asked | Technaut | CC BY-SA 4.0 |