I am building a stereo power amp using boards from Avondale Audio. I have got to the stage where all I need is a PSU, a simple split rail, unregulated (for now) 50-0-50 (approx) power supply.
I am pretty sure that I am on the right track as to how to do this, but I would like confirmation before I start any fires. I am going to use a single discrete rectifier with Schottky diodes, a 700Va 2x40v toroid and two 22,000uf 63v capacitors.
Is there a simple circuit or guide online which will explain how to wire this up? I have found lots of complicated circuits for regulated PSUs but nothing to fulfill my simple needs.
Kind regards,
Ed
I am pretty sure that I am on the right track as to how to do this, but I would like confirmation before I start any fires. I am going to use a single discrete rectifier with Schottky diodes, a 700Va 2x40v toroid and two 22,000uf 63v capacitors.
Is there a simple circuit or guide online which will explain how to wire this up? I have found lots of complicated circuits for regulated PSUs but nothing to fulfill my simple needs.
Kind regards,
Ed
Found some
I have just found an excellent resource at TNT Audio, I would still welcome and guidance from the members here though:
http://www.tnt-audio.com/clinica/ssps1_e.html
I have just found an excellent resource at TNT Audio, I would still welcome and guidance from the members here though:
http://www.tnt-audio.com/clinica/ssps1_e.html
hey watch out for the Schottky diodes that can't take high voltage normally better get one with atleast 200v PIV(i think forgot the terminology here) or not stick with normal diodes and just bypass them with small caps diagram shown in the tnt audio
with 40-0 VAC u should get 40*1.41-1.4(assume silicon turn on voltage one diode is 0.7v and there are two diodes to account for, schottky i not sure) u would get above 50 volts
well good luck then, since this is your first ps supply go for bridge type, easy and good and don't forget that if your caps are big the diodes needed to be rated big also for current demand when turn on
with 40-0 VAC u should get 40*1.41-1.4(assume silicon turn on voltage one diode is 0.7v and there are two diodes to account for, schottky i not sure) u would get above 50 volts
well good luck then, since this is your first ps supply go for bridge type, easy and good and don't forget that if your caps are big the diodes needed to be rated big also for current demand when turn on
Look at any of the schematics for power supplies
at www.passdiy.com or elsewhere. They're pretty
simple.
Those Schottkys will need a 100 V rating for +-50 V
Maybe you want to try something more conventional
first time out, like a $3 bridge from Digikey.
at www.passdiy.com or elsewhere. They're pretty
simple.
Those Schottkys will need a 100 V rating for +-50 V
Maybe you want to try something more conventional
first time out, like a $3 bridge from Digikey.
Have a look at the bottom of this page http://sound.westhost.com/project3a.htm - this should help.
I'm guessing you've bought the
Have you bought the modules complete, or just the boards? Be interested to hear how you get on sourcing the parts, if the latter - particularly if you're in the UK.
I'm guessing you've bought the
Have you bought the modules complete, or just the boards? Be interested to hear how you get on sourcing the parts, if the latter - particularly if you're in the UK.
Power supply basics
There's a very good article on how to design your own power amp supply here:
http://www.zero-distortion.com/techno/powersupply/powersi.htm
Also talks about diodes/bridges quality you can use, as well as caps. An obligatory reading, in my opinion, from both a subjective and objective point of view.
Carlos
There's a very good article on how to design your own power amp supply here:
http://www.zero-distortion.com/techno/powersupply/powersi.htm
Also talks about diodes/bridges quality you can use, as well as caps. An obligatory reading, in my opinion, from both a subjective and objective point of view.
Carlos
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