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Author Topic: Req:Digital control of resonant converters  (Read 899 times)
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itp
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« on: April 24, 2018, 01:22:02 01:22 »

Hi all,

 I would like to know about the practical implementation of digital control of resonant converters. And also to know how to enhance frequency resolution by dithering.
Can somebody please share a practical implementation technique of  micro-controller based such converters.

Thanks & Regards.
Itp
« Last Edit: April 24, 2018, 01:27:04 01:27 by itp » Logged
bigtoy
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« Reply #1 on: April 25, 2018, 10:39:37 10:39 »

The major semi vendors have microcontroller-based LLC reference designs. Here are a couple of links from Infineon to get you started - google is your friend to find many more. (I know that both TI and ST have similar reference designs).

https://www.infineon.com/cms/en/product/evaluation-boards/eval_600w_12v_llc_c7/

https://www.infineon.com/dgdl/Infineon-ApplicationNote_EVAL_600W_12V_LLC_C7_with_600V_C7_XMC-AN-v01_00-EN.pdf?fileId=5546d46253f6505701544cc1d15c20d7

Dithering has its drawbacks - I've seen higher-resolution PWMs used in cases where tighter freq control is required. (But for a practical product, such techniques are better avoided where possible.)
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maurer
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« Reply #2 on: May 01, 2018, 11:39:40 11:39 »

I have also find useful the AN4507 of STM st.com/resource/ja/application_note/dm00119042.pdf
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zab
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« Reply #3 on: May 11, 2018, 03:06:34 03:06 »

i have worked on it little bit
i think link below will help you a lot
https://www.iea.lth.se/publications/MS-Theses/Full%20document/5230_DSP%20Controller%20for%20Power%20Electronic%20Converter.pdf
I was in search of how to find values of L C circuit and came across this.
i will see my hard to find what more I can share
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