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   Graham Sutherland / Polynomial (gsuberland@chaos.social)'s status on Friday, 02-May-2025 09:12:24 JST Graham Sutherland / Polynomial

   someone asked for pictures of the insides of one of my Cosel 5V 200A power supplies.

   pretty hard to get good photos because it's so densely packed. it's an older design so no fancy GaN HEMT stuff, but still some excellent power electronics porn.

   #electronics

   • Embed this notice
     Rich Felker (dalias@hachyderm.io)'s status on Friday, 02-May-2025 09:12:21 JST Rich Felker

     in reply to

     @gsuberland I think the ZVS modules I'm playing with have the same.

   • Embed this notice
     Graham Sutherland / Polynomial (gsuberland@chaos.social)'s status on Friday, 02-May-2025 09:12:22 JST Graham Sutherland / Polynomial

     in reply to

     they feature something I've never seen before: capacitors covered by these plastic domes. at first I thought they were current sensing transformers, but nope, they're definitely capacitors - the silkscreen markings have C-prefixed refdes and they have polarity markings.

     I'm fairly sure this is for thermal isolation, since they're right up against two heatsinks that'll be getting mighty toasty.

   • Embed this notice
     ✧✦Catherine✦✧ (whitequark@mastodon.social)'s status on Friday, 02-May-2025 15:49:29 JST ✧✦Catherine✦✧

     in reply to

     • abrasive

     @abrasive @gsuberland came to say the same thing

   • Embed this notice
     abrasive (abrasive@digipres.club)'s status on Friday, 02-May-2025 15:49:30 JST abrasive

     in reply to

     @gsuberland Are those caps film jobs as part of a resonant tank? I saw a lot of those packages recently when I was looking at induction heating modules, wondering if the package is weird for ESR reasons?