I have an 4V logic circuit (two NAND-gates configured as an SR flip-flop) that I need to drive a mosfet output. To get from the logic gates to the mosfets, I were planning on using a Solid State Switch (SSS). View attachment 60188
My question:
On the load side of the SSS there will be 7-12V DC supply.
Will the 4V DC at max 24mA from my logic circuit be sufficient to trigger the SSS, and hence drive the mosfets?
And where in the datasheet can I find the voltage levels for triggering the SSS (min /max)?
In the datasheed, a resistor is shown on the input/trigger side. Is this necessary when I use a logic NAND-gate to trigger it? And if it is, then how many Ohm?
You don't mention what the logic NAND gate is? Look at figure 6 of the data sheet. Note the forward voltage drop. You also do not mention the MOSFET(s) you plan to drive? There are likely better choices if you better explain what you want to do?
But I wanted to add an extra contact and come up with some logic that allowed the gearbox to not just stop when I released the trigger, but to finish the cycle. And I came up with something that looks ruffly like this (the extra contact are not shown, but the important thing is the location of the "Trigger"): View attachment 60193
There are of course some more logic that shown (including the missing contact), but that's not important right now.
When the "Trigger" is open, the top mosfet should be active to brake the motor. When the "Trigger" is closed the bottom mosfet should be active to drive the motor. Sow my question is still. Will my SSS (from post #1)work in this setup as shown?
My last question from post #1 about the resister shown in the datasheet also still remain.