DC to DC Demystified - Blog 5 - Application description and part selection

RE: DC to DC Demystified - Blog 5 - Application description and part selection

DAB — Thu, 25 Jan 2024 21:57:32 GMT

Very good update.

RE: DC to DC Demystified - Blog 5 - Application description and part selection

javagoza — Thu, 25 Jan 2024 18:42:49 GMT

Chua attractors here and Lyapunov exponents in other challenge blogs! We are becoming mad scientists!

Great application. I look forward to reading your latest blog. You're almost in the lead, cheer up.

RE: DC to DC Demystified - Blog 5 - Application description and part selection

jc2048 — Thu, 25 Jan 2024 14:39:10 GMT

Your Chua curves on the scope look wonderful. Much better than I got when I tried it here a few years ago, so I'm looking forward to your final blog.

Although it's convenient to work dual-rail when lots of analogue circuitry is involved, practically all op amps have only the two supply pins and in simple circuits, at low power, generating a 0V circuit reference voltage by buffering a potential divider strung between two rails can also work. So it would be possible to make it single supply if you wanted to.

"...the duty cycle might end up being too low to be reasonably achieved and I'm not going to be regulating the output using feedback..."

Might it be safer to use a 12V zener on each rail to simply catch the voltage as it increases, and set the PWM to several times what the Chua circuit needs at that voltage? Not very energy efficient, but you'd get a reasonably steady supply voltage and it will improve the rate at which the voltage climbs when it initially charges your output cap.

RE: DC to DC Demystified - Blog 5 - Application description and part selection

dougw — Thu, 25 Jan 2024 03:13:42 GMT

Entertaining job - turning the selection process into a contest.