High Power Switch for Power Signal

[ElectronicsRookie]

High Power Switch for Low Power Signal

Greetings,
I am looking for a way to make low power signal (about 2V and 5oo uA) to turn on switch to short another independent source (about 8 to 12V and 1 t 5 mA) without stealing power from another source and without loosing power by this process. My first choice was MOSFET however, for Vds of 10V I need minimum Vgs of 7V to turn on/off MOSFET using IRF9630. (by experimenting, suggestion where this can be found on datasheet will help too since I dont know how to read this). I believe MOSFET will not do, I might try darlington optocoupler or analog switch . My goal is to use minimum power as much as possible to turn on switch for a decent power source. It sounds like impossible task, but I will appreciate some experience/suggestions from anyone.
Thank you.

 

[goldsmith]

Hi

source and without loosing power by

I hope you know there is no ideal thing in this world ! ( all of the circuits has dissipation however just a bit ! )
hence a bit power consumption is unavoidable .

I am looking for a way to make low power signal (about 2V and 5oo uA) to turn on switch to short another independent source (about 8 to 12V and 1 t 5 mA)

Well there are gang of ideas available for your aim . such as using mosfets ( there are many many mosfets available that can be turned on with voltages below 2 volts ! )
or perhaps using a BJT to do it . or perhaps using an opto coupler .
Best Wishes
Goldsmith

 

[ElectronicsRookie]

I think EPAD MOSFET will do the job. The gate voltage / current limit are in 2V/100 uA range. They can handle large Vdd and Ids. They are much better than optoisolators when forward current is at best 500 uA which is too much for me.