With @sad_electronics and others discussing funky switching regulator circuits in another thread, I was reminded of something I’ve been wanting to try for a while now: Take a small microcontroller such as STM32G030 and make it a switching regulator with as few external components as possible.
=> More informations about this toot | More toots from jaseg@chaos.social
I know that other people have done this before and that there are manufacturer application notes on this because it has legitimate applications in high-power converters that need complex, custom control loops. I still kind of want to try it myself.
=> More informations about this toot | More toots from jaseg@chaos.social
This idea has a similar vibe to @janamarie deciding to use an STM32 as an IO expander in a thread last weekend. It would be a neat challenge to take a schematic and just see if you can replace every chip with a microcontroller somehow 🤣
=> More informations about this toot | More toots from jaseg@chaos.social
@jaseg I've used STM32's before as switching regulators 😬 (actually my first STM32 project was all about this). I can highly recommend to look at their HRTIM, up 5.6GHz "clock" with 16bit timer depth and good analog peripheral interconnect allows for >Mhz PWM output with a fairly high resolution, current and voltage measurement and control, and even overcurrent break inputs
=> More informations about this toot | More toots from janamarie@chaos.social
@jaseg I'd say go for it. I'd probably start with an stm32g* that has a hardware comparator built in, just to have an easy way to be sure you react in time to overcurrent, but other than that: not that hard. (I mean, the hard part is the robust yet nimble control loop design, and hm, you'd probably just test that with a PRNG-switched load as test and fiddle an IIR as loopback filter until you get good behaviour.)
=> More informations about this toot | More toots from funkylab@mastodon.social This content has been proxied by September (ba2dc).Proxy Information
text/gemini