# Voltage multiplier - "loss less"

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#### FriedMule

Warning noob here!

I think I have copied the simplest voltage multiplier correctly but as you can see it is a fairly high amperage. Not sure what SMD components to choose or if it is even the best circuit?
I would like to minimize the Voltage loss as much as possible, first to avoid heat but also to get as near to 45VDC as possible, loss in Ampere do not matter.

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#### rayma

The input listed is DC 15V, and will not work. Do you mean AC 15 Vrms?
What exactly is the output you need?

#### FriedMule

The input listed is DC V, and will not work. Do you mean AC Vrms?
Thanks! No I try to convert DC to 1x/2x/3x DC

#### Enzo

Unless I am having a senior moment, that won't work. VOltage doublers don't work on DC. If you apply +15v to that, it will flow directly through D1, D2, and D3, and on to your output. You will thus get +15v less three diode drops, approximately one volt each.

Current is not pushed into things, things draw current from the source. SO if you had a 15v input capable of 60A, the output could draw as much current as possible until it burnt out a diode.

#### rayma

Thanks! No I try to convert DC to 1x/2x/3x DC

If you are restricted to a DC source, you will need a switching DC-DC converter.
What output(s) exactly do you need?

#### FriedMule

If you are restricted to a DC source, you will need a switching DC-DC converter.
What output(s) exactly do you need?
OH DC-DC converters, is that not something with boost converter, noise and ripples?

I have a 0-15VDC 60A but need the possibility to get from 0-45VDC

#### rayma

OH DC-DC converters, is that not something with boost converter, noise and ripples?
I have a 0-15VDC 60A but need the possibility to get from 0-45VDC

Is this for personal or commercial use? What is the load and the output current needed?
A custom design by a local company may be best in this case.

#### FriedMule

Is this for personal or commercial use? What is the load and the output current needed?
A custom design by a local company may be best in this case.
It's simply for my home lab but I would like to draw as much power as possible , not that I can't live without but it would be great to be able to use my PSU's full capability.

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#### Vovk Z

Thanks! No I try to convert DC to 1x/2x/3x DC
It is possible only with dc/dc converter (boost type).
If you have 15 V AC, and want to make powerful multiplyer - for such large enough currents you will need such a big capasitors (tenth or hundreds of millifarads), that it may be cheaper to use rectifier and dc-dc instead.

#### Mark Tillotson

OH DC-DC converters, is that not something with boost converter, noise and ripples?
You mean like a capacitor-diode voltage multiplier running from AC?

There is no way to multiply a DC voltage.

#### FriedMule

You mean like a capacitor-diode voltage multiplier running from AC?

There is no way to multiply a DC voltage.
No I think I have learned that... thanks to you all!
Am I right in that you can only multiply DC by chopping it up or convert it to AC?

#### Mark Tillotson

Yes, thought that was very clear... (Although this is electronically, you can connect two DC motor-generators together).

#### FriedMule

Yes, thought that was very clear...
It was, but I do still sometimes manage to misunderstand even the most obvious and clear explanations, so better ask one more time then not learn a thing

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