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DIY For Audio
Switched mode power supplies vs Buck converters
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<blockquote data-quote="Skylar" data-source="post: 1170933" data-attributes="member: 17146"><p>Chris, a simple CLC filter may be all you need with a step-down Buck converter. I can provide a simple schematic that I've built and used successfully in a preamp.</p><p></p><p>The <strong>CRCLCRC filter</strong> by XRK471 works well with headphone amps where you would hear any noise emanating from a smps. See <a href="https://www.diyaudio.com/community/threads/welcome-to-xrk-audio.372283/post-7547280" target="_blank">post #68</a></p><p></p><p>You may also want to have a look at two psu filter designs by Mark Johnson on diyAudio.</p><p></p><p><a href="https://www.diyaudio.com/community/threads/po89zb-an-inline-dc-filter-for-smps-wall-warts-preamps-hpa-korg-nutube-etc.354213/" target="_blank"><strong>PO89ZB: </strong>an inline DC filter for SMPS</a></p><p></p><p><a href="https://www.diyaudio.com/community/threads/amyalice-dc-filter-for-smps-using-2-feedthru-capacitors-smd-assembly-max-3a-max-48v.405099/" target="_blank"><strong>AmyAlice: </strong>DC filter for SMPS, using 2 feedthru capacitors + SMD assembly. max 3A & max 48V</a></p><p></p><p>Mark reckons the AmyAlice filter is about 8 times as efficient as the <a href="https://www.diyaudio.com/community/threads/po89zb-an-inline-dc-filter-for-smps-wall-warts-preamps-hpa-korg-nutube-etc.354213/" target="_blank">PO89ZB</a> , but the catch is that it's smd only. There are Gerbers available, should you want to go that route.</p></blockquote><p></p>
[QUOTE="Skylar, post: 1170933, member: 17146"] Chris, a simple CLC filter may be all you need with a step-down Buck converter. I can provide a simple schematic that I've built and used successfully in a preamp. The [B]CRCLCRC filter[/B] by XRK471 works well with headphone amps where you would hear any noise emanating from a smps. See [URL='https://www.diyaudio.com/community/threads/welcome-to-xrk-audio.372283/post-7547280']post #68[/URL] You may also want to have a look at two psu filter designs by Mark Johnson on diyAudio. [URL='https://www.diyaudio.com/community/threads/po89zb-an-inline-dc-filter-for-smps-wall-warts-preamps-hpa-korg-nutube-etc.354213/'][B]PO89ZB: [/B]an inline DC filter for SMPS[/URL] [URL='https://www.diyaudio.com/community/threads/amyalice-dc-filter-for-smps-using-2-feedthru-capacitors-smd-assembly-max-3a-max-48v.405099/'][B]AmyAlice: [/B]DC filter for SMPS, using 2 feedthru capacitors + SMD assembly. max 3A & max 48V[/URL] Mark reckons the AmyAlice filter is about 8 times as efficient as the [URL='https://www.diyaudio.com/community/threads/po89zb-an-inline-dc-filter-for-smps-wall-warts-preamps-hpa-korg-nutube-etc.354213/']PO89ZB[/URL] , but the catch is that it's smd only. There are Gerbers available, should you want to go that route. [/QUOTE]
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Switched mode power supplies vs Buck converters
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