vom1271 psu switch

[trean27]

Im trying to make a psu rail switch on high side.
so the vom1271 will give 13 volt about to turn on off mosfet which will controll the mosfet on the Rail.
I made it on the postive rail which work just fine,
but on the negative rail , i can understand that maybe the postive volt from the vom1271 can be a challange.
I simulated with just a mosfet insted of the vom1271 model which I have too,
anyone who could tell me or rarther show me how to hook up this negative rail so it cuts the volt when the vom1271 goes to 0... ?

best regards
Niklas.

 

[PRR]

VOM1271 is totally floating. You can use an N-type MOSFET. You do not need any other complication.

 

[trean27]

VOM1271 is totally floating. You can use an N-type MOSFET. You do not need any other complication.

ok , thanks... took me long time to figure out, but got it now with your help. 🙂

I got the circuit to work I think,
not a enginer but think I got it almost right.
Borrowed the speaker relay function from Goldmunds memisis,

I will add the circuit under here now.

best regards Niklas.

 

[trean27]

Vom1271 dual rail clip with speaker protection from memesis.

I belive maybe this could work.
Maybe som insight in this prosject could be nice. 🙂
I appreciate constructive help, Im not a pro.

It could be some mistakes that I probably made here
.
I simulated as best i could, so I
have adjusted the input from speaker with different offset..
and the load to speaker i lowered the ohm, instead off using a current source,
got problem when rail was off...
but works now i belive in sim.

thanks .
Niklas.