Forums

Switching Regulator

Started by John Smith December 20, 2015
I have a transformer which is rated at 12V AC, 1A

I'd like to turn that into 5V at up to 2A, or a little less than 2A if
there's not enough margin.

What's the best switching regulator chip to use with easily available
peripheral components?
And preferably in a DIP package.

This is a one time build so I don't need super low cost.

I'm not unable to search google, digikey etc myself but it often happens
that someone here will suggest a better device.



Den s�ndag den 20. december 2015 kl. 22.50.17 UTC+1 skrev John Smith:
> I have a transformer which is rated at 12V AC, 1A > > I'd like to turn that into 5V at up to 2A, or a little less than 2A if > there's not enough margin. > > What's the best switching regulator chip to use with easily available > peripheral components? > And preferably in a DIP package. > > This is a one time build so I don't need super low cost. > > I'm not unable to search google, digikey etc myself but it often happens > that someone here will suggest a better device.
hard to beat the price and simplicity of something like this http://www.ebay.com/itm/191095423493 -Lasse
>"Lasse Langwadt Christensen" <langwadt@fonz.dk> wrote in message >news:f44f8204-2c09-4b07-8aa7-0b0a9e16d5fd@googlegroups.com... >Den s&#2013266168;ndag den 20. december 2015 kl. 22.50.17 UTC+1 skrev John Smith: >> I have a transformer which is rated at 12V AC, 1A >> >> I'd like to turn that into 5V at up to 2A, or a little less than 2A if >> there's not enough margin. >> >> What's the best switching regulator chip to use with easily available >> peripheral components? >> And preferably in a DIP package. >> >> This is a one time build so I don't need super low cost. >> >> I'm not unable to search google, digikey etc myself but it often happens >> that someone here will suggest a better device. > >hard to beat the price and simplicity of something like this
>http://www.ebay.com/itm/191095423493
>-Lasse
Perfect. Thanks Lasse.
Den s&#2013266168;ndag den 20. december 2015 kl. 23.49.37 UTC+1 skrev John Smith:
> >"Lasse Langwadt Christensen" <langwadt@fonz.dk> wrote in message > >news:f44f8204-2c09-4b07-8aa7-0b0a9e16d5fd@googlegroups.com... > >Den s&#2013266168;ndag den 20. december 2015 kl. 22.50.17 UTC+1 skrev John Smith: > >> I have a transformer which is rated at 12V AC, 1A > >> > >> I'd like to turn that into 5V at up to 2A, or a little less than 2A if > >> there's not enough margin. > >> > >> What's the best switching regulator chip to use with easily available > >> peripheral components? > >> And preferably in a DIP package. > >> > >> This is a one time build so I don't need super low cost. > >> > >> I'm not unable to search google, digikey etc myself but it often happens > >> that someone here will suggest a better device. > > > >hard to beat the price and simplicity of something like this > > >http://www.ebay.com/itm/191095423493 > > >-Lasse > > Perfect. Thanks Lasse.
you are welcome if all you want is something that can give 5V@2A from a mains supply I wouldn't bother with a transformer and switcher, just go buy a random USB cell cellphone charger, most are 5V@2A -Lasse
Lasse Langwadt Christensen brought next idea :
> Den s&#2013266168;ndag den 20. december 2015 kl. 22.50.17 UTC+1 skrev John Smith: >> I have a transformer which is rated at 12V AC, 1A >> >> I'd like to turn that into 5V at up to 2A, or a little less than 2A if >> there's not enough margin. >> >> What's the best switching regulator chip to use with easily available >> peripheral components? >> And preferably in a DIP package. >> >> This is a one time build so I don't need super low cost. >> >> I'm not unable to search google, digikey etc myself but it often happens >> that someone here will suggest a better device.
> hard to beat the price and simplicity of something like this
> http://www.ebay.com/itm/191095423493
> -Lasse
Bad Bad Advice.. You cannot get 2 amps out of a 1 amp transformer without letting the magic smoke out. PLEASE LEARN THE FACTS before you give advice. B-) -- John G Sydney.
Den mandag den 21. december 2015 kl. 01.18.39 UTC+1 skrev John G:
> Lasse Langwadt Christensen brought next idea : > > Den s&#2013266168;ndag den 20. december 2015 kl. 22.50.17 UTC+1 skrev John Smith: > >> I have a transformer which is rated at 12V AC, 1A > >> > >> I'd like to turn that into 5V at up to 2A, or a little less than 2A if > >> there's not enough margin. > >> > >> What's the best switching regulator chip to use with easily available > >> peripheral components? > >> And preferably in a DIP package. > >> > >> This is a one time build so I don't need super low cost. > >> > >> I'm not unable to search google, digikey etc myself but it often happens > >> that someone here will suggest a better device. > > > hard to beat the price and simplicity of something like this > > > http://www.ebay.com/itm/191095423493 > > > -Lasse > > Bad Bad Advice.. You cannot get 2 amps out of a 1 amp transformer > without letting the magic smoke out.
it is a switching regulator, input: 12V*1A = 12W, output: 5V*2A = 10W so it will work as long as the switcher is resonably efficient
> > PLEASE LEARN THE FACTS before you give advice. B-)
ditto.. -Lasse
"John G" <john.g@green.com> wrote in message 
news:GNWdnWSi8cHF2OrLnZ2dnUU7-W-dnZ2d@westnet.com.au...
> Lasse Langwadt Christensen brought next idea : >> Den s&#2013266168;ndag den 20. december 2015 kl. 22.50.17 UTC+1 skrev John Smith: >>> I have a transformer which is rated at 12V AC, 1A >>> >>> I'd like to turn that into 5V at up to 2A, or a little less than 2A if >>> there's not enough margin. >>> >>> What's the best switching regulator chip to use with easily available >>> peripheral components? >>> And preferably in a DIP package. >>> >>> This is a one time build so I don't need super low cost. >>> >>> I'm not unable to search google, digikey etc myself but it often happens >>> that someone here will suggest a better device. > >> hard to beat the price and simplicity of something like this > >> http://www.ebay.com/itm/191095423493 > >> -Lasse > > Bad Bad Advice.. You cannot get 2 amps out of a 1 amp transformer without > letting the magic smoke out. > > PLEASE LEARN THE FACTS before you give advice. B-)
I think the advice I was given was excellent. If you don't, could you please explain in detail why you don't?
> > -- > John G Sydney.
In article <87421125-3a23-4bf5-96b0-4ef5c836529c@googlegroups.com>, 
langwadt@fonz.dk says...
> > Den s&#2013266168;ndag den 20. december 2015 kl. 23.49.37 UTC+1 skrev John Smith: > > >"Lasse Langwadt Christensen" <langwadt@fonz.dk> wrote in message > > >news:f44f8204-2c09-4b07-8aa7-0b0a9e16d5fd@googlegroups.com... > > >Den s&#2013266168;ndag den 20. december 2015 kl. 22.50.17 UTC+1 skrev John Smith: > > >> I have a transformer which is rated at 12V AC, 1A > > >> > > >> I'd like to turn that into 5V at up to 2A, or a little less than 2A if > > >> there's not enough margin. > > >> > > >> What's the best switching regulator chip to use with easily available > > >> peripheral components? > > >> And preferably in a DIP package. > > >> > > >> This is a one time build so I don't need super low cost. > > >> > > >> I'm not unable to search google, digikey etc myself but it often happens > > >> that someone here will suggest a better device. > > > > > >hard to beat the price and simplicity of something like this > > > > >http://www.ebay.com/itm/191095423493 > > > > >-Lasse > > > > Perfect. Thanks Lasse. > > you are welcome > > if all you want is something that can give 5V@2A from a mains supply > I wouldn't bother with a transformer and switcher, just go buy a random > USB cell cellphone charger, most are 5V@2A > > > -Lasse
I go to the junk store and get those little qubes you plug in that gives a USB port. I remove the board from its case and mount it on the project board. The last one I did I allowed the USB to be exposed so that I could plug in a device for charging, supply or back feed from a 5 volt source from elsewhere. Not bad for something that only cost 50 cents at the junk store. Jamie
Den mandag den 21. december 2015 kl. 01.35.46 UTC+1 skrev M Philbrook:
> In article <87421125-3a23-4bf5-96b0-4ef5c836529c@googlegroups.com>, > langwadt@fonz.dk says... > > > > Den s&#2013266168;ndag den 20. december 2015 kl. 23.49.37 UTC+1 skrev John Smith: > > > >"Lasse Langwadt Christensen" <langwadt@fonz.dk> wrote in message > > > >news:f44f8204-2c09-4b07-8aa7-0b0a9e16d5fd@googlegroups.com... > > > >Den s&#2013266168;ndag den 20. december 2015 kl. 22.50.17 UTC+1 skrev John Smith: > > > >> I have a transformer which is rated at 12V AC, 1A > > > >> > > > >> I'd like to turn that into 5V at up to 2A, or a little less than 2A if > > > >> there's not enough margin. > > > >> > > > >> What's the best switching regulator chip to use with easily available > > > >> peripheral components? > > > >> And preferably in a DIP package. > > > >> > > > >> This is a one time build so I don't need super low cost. > > > >> > > > >> I'm not unable to search google, digikey etc myself but it often happens > > > >> that someone here will suggest a better device. > > > > > > > >hard to beat the price and simplicity of something like this > > > > > > >http://www.ebay.com/itm/191095423493 > > > > > > >-Lasse > > > > > > Perfect. Thanks Lasse. > > > > you are welcome > > > > if all you want is something that can give 5V@2A from a mains supply > > I wouldn't bother with a transformer and switcher, just go buy a random > > USB cell cellphone charger, most are 5V@2A > > > > > > -Lasse > > I go to the junk store and get those little qubes you plug in that gives > a USB port. > I remove the board from its case and mount it on the project board. > > The last one I did I allowed the USB to be exposed so that I could > plug in a device for charging, supply or back feed from a 5 volt source > from elsewhere. > > Not bad for something that only cost 50 cents at the junk store.
just gotta be aware that alot of the cheap fakes cannot deliver what they promise and are questionable, to say the least, with regards to safety -Lasse
On 12/20/2015 2:51 PM, John Smith wrote:
>> "Lasse Langwadt Christensen" <langwadt@fonz.dk> wrote in message >> news:f44f8204-2c09-4b07-8aa7-0b0a9e16d5fd@googlegroups.com... >> Den s&#2013266168;ndag den 20. december 2015 kl. 22.50.17 UTC+1 skrev John Smith: >>> I have a transformer which is rated at 12V AC, 1A >>> >>> I'd like to turn that into 5V at up to 2A, or a little less than 2A if >>> there's not enough margin. >>> >>> What's the best switching regulator chip to use with easily available >>> peripheral components? >>> And preferably in a DIP package. >>> >>> This is a one time build so I don't need super low cost. >>> >>> I'm not unable to search google, digikey etc myself but it often happens >>> that someone here will suggest a better device. >> >> hard to beat the price and simplicity of something like this > >> http://www.ebay.com/itm/191095423493 > >> -Lasse > > Perfect. Thanks Lasse. > >
Seems like doing it the hard way. You don't say, but assuming you want 5VDC and have 12VAC, you're gonna need rectifiers and caps plus the board and two cords and a fuse and a box to put it in... 5VDC 2A wall warts are easy to find and already packaged and UL approved and...and...they just work.