RE: Using Polymer Capacitors for Supply De-coupling in the Current Amplifier

shabaz — Fri, 31 May 2019 10:48:48 GMT

Hi Donald,

Excellent blog post and project, and as [mention:f80b53cee57c44bc9d7c577d07d7c791:e9ed411860ed4f2ba0265705b8793d05] says that's a really nice set-up!

By co-incidence, for a project I'm working on, I've been looking at Panasonic SEQP too, it's fantastic being able to design with a capacitor that is far cheaper than tantalum, and possibly won't degrade like old alu electrolytics. The low ESR is nice too, and I'm going to parallel it with an MLCC too, and it will form the input power entry portion of the board. I like that they come in 10V versions, so I'm going to use that for 5V power entry, so that there is some voltage derating too (not sure how much is recommended). Also, [mention:a5312e9762dd4699ba5d3876da34ffe5:e9ed411860ed4f2ba0265705b8793d05] made an observation about reverse voltage w.r.t. polymer caps, so the power entry portion will have space for a reversed diode too just-in-case (since my project does not have a transformer supply directly permanently connected as in your case).

RE: Using Polymer Capacitors for Supply De-coupling in the Current Amplifier

jw0752 — Fri, 31 May 2019 02:24:14 GMT

Hi Donald,

It is great that you are using this experiment to expand your knowledge and experience with the previous project. I am interested in reading your results. Your test board is very impressively organized.

John