Timeline for MOSFET 24V high-side switch
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
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| Aug 6, 2020 at 21:42 | vote | accept | boileau | ||
| Aug 4, 2020 at 8:59 | history | edited | jonk | CC BY-SA 4.0 |
added 878 characters in body
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| Aug 2, 2020 at 10:15 | comment | added | jonk | @boileau Yes, use those devices. Yes, since it is operated in active mode you would need to modify \$R_4\$. You want about \$2.6\:\text{mA}\$ in \$R_4\$. If you used a \$5\:\text{V}\$ rail you'd want to change it to about \$1.5\:\text{k}\Omega\$. (I calculate \$1.65\:\text{k}\Omega\$, to be exact, as \$R_4=\frac{V_\text{CC}-700\:\text{mV}}{2.6\:\text{mA}}\$.) That's the only change needed. | |
| Aug 2, 2020 at 10:03 | comment | added | boileau | By the way, is your schematic sensitive to the I/O voltage? I was considering powering my MCP23017 (I/O expander) with 5V instead. | |
| Aug 2, 2020 at 9:56 | comment | added | boileau | Very nice, thanks. Would I be able to use the 1N4004 and 2N3904 that I already have for D1 and Q1 instead? | |
| Aug 2, 2020 at 9:37 | history | answered | jonk | CC BY-SA 4.0 |