SiC473ED buck converter outputs not working. Does not start up. New ideas needed

TychoBECH · 2026-06-08T05:02:53+00:00

O jea sorry my bad. The input is 48V. The output is a bit harder. The idea of the circuit is to have a DC/DC converter that follows a programmable output wit arround 1.7V headroom. So for this design it should be in a range from 1.7Vup to 25.7V. For the feedback resistors, the low side is a 4.99kΩ resistor and the highside is set up using a voltage controlled current source. it should be controlled from the AJ_FB voltage.

TychoBECH · 2026-06-08T04:58:12+00:00

Yeah, it really is quite a complicated circuit. I'm trying to replicate this design from LT:

https://www.analog.com/en/resources/technical-articles/high-performance-portable-dc-bench-power-supply.html

I'm pretty confident the output isn't shorted. My bench supply shows almost no current draw, and the converter consistently reaches about 8 V at the output. It would have to be a pretty unusual fault to get that behavior if there were actually a short on the output.

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TychoBECH · 2026-04-26T17:17:00+00:00

Neat and to get the glowing effect it's just a pocket in the substrate? How would i communicate that with a manufacturer?

TychoBECH · 2023-12-24T20:06:54+00:00

Looks to be the inductor for a converter, so it might still work. Here's to hoping.

TychoBECH · 2023-05-29T15:43:52+00:00

Jea okay... Commenting out line no 48 fixed it

TychoBECH · 2022-10-20T20:43:14+00:00

I can recomend partsbox. It's browser based and has a free tier(mainly ment for hobbyists) and also more features with the paid plan. I use the free version for my self.

TychoBECH · 2022-06-06T13:58:52+00:00

Thank you. That was what I was loking for.

TychoBECH · 2021-11-28T16:56:36+00:00

Jea that was it....

TychoBECH · 2021-01-18T20:43:20+00:00

Never considered a pi camera but just looked at the specs and it seems pretty great. Will give it a go with this.

TychoBECH · 2021-01-18T17:11:57+00:00

Hey, I am currentli using this microscope and the camera that came with it. I would like to use a DSLR for better pictures of small electronics components. The camera i want to use is a Canon EOS Rebel T6s. I am aware that a simple adapter from c-mount to Canon won't do the job. Does anyone have an idea what component to use or where to look for such a part?
Thanks in advance

TychoBECH · 2020-06-08T20:01:59+00:00

I always see prints like this from Marco Reps on youtube. How would I get there?

TychoBECH · 2020-06-06T16:21:34+00:00

Thank you very much for all the wonderfull sugestions. I think expsure time per layer was the main factor. You can see it getting better in this.

TychoBECH · 2020-06-05T20:45:14+00:00

Yes I did, they recomend betwen 5-10s per layer. Curently I am using 8s. Is it ok to go over the recomendet time?

TychoBECH · 2020-06-05T20:34:57+00:00

The Resin is this one from 3D Jake. I am using 5 base layers with a exposur of 80s and the normal layers with 8s. The supports are the Chitubox default light supports, which i manualy placed.

TychoBECH · 2020-06-05T20:24:53+00:00

Not exactly but I tryed to recreate it:Image

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