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From: John Popelish
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Subject: Re: Who have circuit diagram for DC to DC converter ?
Date: Tue, 22 Oct 2002 15:38:17 GMT
NNTP-Posting-Date: Tue, 22 Oct 2002 11:38:17 EDT
> I want to build a DC to DC converter that have specification as
> follows :
> +) Input range 6 - 18 volts (DC)
> +) Output voltage 12 volts (DC)
> +) Output power 500 watts
> +) I want this DC to DC converter have an active filter to eliminate
> the ripple and noise that appear in the output.
> If you have circuit diagram, PCB layout and also list of his
> components, i hope you can share it with me by send to my email.
> For yours help thanks a lot of.
I don't have a design to hand you, but have a few suggestions.
You need a spec for output accuracy and noise amplitude. The output
average voltage will vary with temperature, input voltage change, time
and load. Think about how much variation you can stand. Perfection
I assume 500 watts is the maximum output power. What is the minimum?
Might the converter ever run completely unloaded? What output voltage
is acceptable under that case?
Active filters are used for signals, not power sources. When you nail
down a spec for spike amplitude and RMS ripple, a passive output
filter may be designable. You may also need filtering on the input to
keep this converter from confusing anything else that is powered from
the 6 to 18 volt source.
Must the output be isolated from the source, or is it to share a
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