Need SMPS schematic w/ input 90-240 VAC / output ±70 20A

[Tidus2728]

smps schematic

Hi

I'm new to this design and I would like to ask anybody here if they have a schematic or link to schematics of a SMPS unit with 90-240 VAC input and output of ±70 VDC 20 Amps for the MOSFET Amp I assembled?

Thanks,

Tidus2728

 

[IanP]

smps schematics

The schematic on the SMPS is here:

For your project you will need 2 of them to cover +/-70V.
The inputs will need +/-80 to +/- 90V.. to provide proper regulation ..

 

[Tidus2728]

smps for audio amplifier

Thanks.

Do you have a clearer copy of the schematic? I already enhanced the picture but some values and component parts are still unreadable.

Does this mean this schematic has DC input voltage and not AC?

Thanks again.

 

[IanP]

simple smps schematic

On this schematic the input is shown as a DC ..
Using this concept you will have to have a step-down transformer which will operate with both 120 and 230 voltages .. and the voltage has to be rectified with a smoothing cap ..

Can I have some questions:
Do you really need stabilized voltage to supply your amplifier?
Can you accept a centre tap transformer with +/- voltage rectifier + caps to supply your amplifier? ..

 

[marie65]

more:schematics

If you intend to use the PSU for an audio amplifier, it will be better to use the classic one with transformer, bridge rectifier and high value capacitors. A SMPS, cannot stand the peak values demands of the amplifier.