Hi i have not been on this site for a while....I am interested in the Salas SSLV latest version .... are the boards and kits available. Also in there a variant where a high power output transistor can be used so i could get say 19v at 6A..... Currently using Belleson Super Regulators
For such high power look into L-Adapter. Not a variant but a different suitable design. For boards & parts GB availability look at member's Tea-Bag signature line links.
Hi just how good are the Salas shunt regulators......compared to say Super Regulators by Belleson???
Just got a notice from mouser that the on semi fqp3N30 transistor has gone end of life. Hopefully some will be available for a while.
Don
Don
The recommended replacement for this part by OnSemi is the FQP6N40C
I comment:
Its twice as powerful, also has twice the FQP3N30's reverse capacitance and 30% better RθJC so no surprises here. Still low pF for the current it can pass. Roughly equivalent to IRF630 (ST brand is low pF). Can't do any better with this EOL situation...
I comment:
Its twice as powerful, also has twice the FQP3N30's reverse capacitance and 30% better RθJC so no surprises here. Still low pF for the current it can pass. Roughly equivalent to IRF630 (ST brand is low pF). Can't do any better with this EOL situation...
Is it best from your point of view to flip to the 6N40C even if we can get our hands on the 3N30? Thank you for continuing to support us with your designs. Greatly appreciated.
Don
Don
First its about the application. If for below 1A CCS there is the comparably fast IRF610 that can substitute the 3N30. As noted on the original schematic. For higher CCS setting keep with the 3N30 until it's not to be found anywhere anymore as it has to have better PSRR in very high frequencies than the 6N40C. Because of less pF. I believe there are plenty 3N30s stocked by Tea for GB kits (?). Unless you need the extra power of the 6N40C. By then you are in a very hot CCS M1 dissipation territory already.
You are welcome. In other words the FQP6N40C is very fast for its doubled power spec but keep with the even faster FQP3N30 as long as you can find it, for up to 1.5A CCS apps.
Further to this, and me not really understanding why we have negative power supplies!....can we use a negative Ubib as a positive, just wire the load inverse?
When PSUs are isolated and floating (own secondaries, own bridges per section) you can basically arrange what you can arrange with battery cells. Lab PSUs are an example.
Polarity of a floating cell is defined between its ends. You can't use a single UBiB as any polarity, but you can combine more vs a point.
A positive or a negative in a system is relative to a reference. If that reference is arbitrary, correct interfacing with other systems must be considered.
With true negative supplies you can have middle tap, shared bridge, mains ground common, etc. As in power amps is usual.
UBiBs can fit in any system because flexible. Independent for secondaries & bridges but with a true negative section too.
Polarity of a floating cell is defined between its ends. You can't use a single UBiB as any polarity, but you can combine more vs a point.
A positive or a negative in a system is relative to a reference. If that reference is arbitrary, correct interfacing with other systems must be considered.
With true negative supplies you can have middle tap, shared bridge, mains ground common, etc. As in power amps is usual.
UBiBs can fit in any system because flexible. Independent for secondaries & bridges but with a true negative section too.
Thanks!
Got these heatsinks to play with. Dont know if they're 'enough ' for running low CCS. We will see. I saw them on Mouser and they looked really nice. They fit quite nicely as they sit up to the pcb for some mechanical stability. I know there are no insulators in there yet.
Its a real fiddle fitting one to a board already populated!
I got another one to try aswell a bit longer but not as much meat so maybe even less suitable....we shall see.!
Got these heatsinks to play with. Dont know if they're 'enough ' for running low CCS. We will see. I saw them on Mouser and they looked really nice. They fit quite nicely as they sit up to the pcb for some mechanical stability. I know there are no insulators in there yet.
Its a real fiddle fitting one to a board already populated!
I got another one to try aswell a bit longer but not as much meat so maybe even less suitable....we shall see.!
Yes I thought so.!
This is the sink you see above.
https://eu.mouser.com/ProductDetail/Ohmite/VRA-55-101E?qs=rI7uf1IzohTCxyg5G/7OyQ==
I also bought this one and used the clips off it. This one has a flat upper and so maybe could add some mass onto it
https://eu.mouser.com/ProductDetail/Ohmite/C220-050-2AE?qs=zRaq9JBfD9%2BFIZTL8whsYA==
I couldn't find the clip on Moiser.i guess I could have drilled and tapped it.
I also got this one to try...75mm long, but it is quite light
https://eu.mouser.com/ProductDetail/Wakefield-Vette/693-75?qs=vLWxofP3U2zqYvFO0uRJDg==
This is the sink you see above.
https://eu.mouser.com/ProductDetail/Ohmite/VRA-55-101E?qs=rI7uf1IzohTCxyg5G/7OyQ==
I also bought this one and used the clips off it. This one has a flat upper and so maybe could add some mass onto it
https://eu.mouser.com/ProductDetail/Ohmite/C220-050-2AE?qs=zRaq9JBfD9%2BFIZTL8whsYA==
I couldn't find the clip on Moiser.i guess I could have drilled and tapped it.
I also got this one to try...75mm long, but it is quite light
https://eu.mouser.com/ProductDetail/Wakefield-Vette/693-75?qs=vLWxofP3U2zqYvFO0uRJDg==
You're a scholar and a gentleman. Much obliged.
I'm always looking for something to give my projects a little pizzazz and this heatsink fits the bill.
You're welcome organic! They certainly are am elegant solution. Let's see if they suffice. I have a tiny fan that could help if needed but I don't really want to use it to keep it neat.
That was my main aim Nick, it has allowed me to squeeze in a transformer more elegantly.
I guess for those with a heavy metal wall of chassis to bolt to then nothing is gained with these but for me in this chassis I hope they come up trumps!
I shall try to fire one up soon and see if it melts!
That was my main aim Nick, it has allowed me to squeeze in a transformer more elegantly.
I guess for those with a heavy metal wall of chassis to bolt to then nothing is gained with these but for me in this chassis I hope they come up trumps!
I shall try to fire one up soon and see if it melts!