📢 New application note! 📄 𝑰𝒎𝒑𝒂𝒄𝒕 𝒐𝒇 𝒐𝒖𝒕𝒑𝒖𝒕 𝒄𝒂𝒑𝒂𝒄𝒊𝒕𝒐𝒓 𝒐𝒏 𝒇𝒆𝒆𝒅𝒃𝒂𝒄𝒌 𝒍𝒐𝒐𝒑 𝒔𝒕𝒂𝒃𝒊𝒍𝒊𝒕𝒚 𝒐𝒇 𝒂 𝒑𝒐𝒘𝒆𝒓 𝒔𝒖𝒑𝒑𝒍𝒚 (ANP117)
Some weeks ago, I shared an invitation to join my colleague Eleazar Falco's webinar about the impact of output capacitors, which sparked some skeptical responses on my LinkedIn network 😅. Now, the accompanying application note has finally been released. If you didn't watch the webinar or the video recording, the application note is a great way to delve into the topic.
From the authors own words:
"In a switching power supply, the output capacitors are typically selected based on voltage ripple and transient response requirements. However, they also affect the feedback control loop as they shape the plant transfer function of the converter. As the compensator circuit is designed for a specific plant characteristic, changes in output capacitor parameters may cause not only a reduction of stability margins, but also full-blown instability of the feedback control loop. There are different scenarios during a design cycle involving a change in the output capacitors of the power supply, like for example, the removal of a ‘bulk’ capacitor (resulting in an important reduction in capacitance and ESR), and the replacement of the output capacitor by an equivalent part (with same capacitance but lower ESR). Both cases have been considered in this document with a VM-CCM buck converter design example."
Find it here, I hope you like it 😉
https://lnkd.in/dxEdPgt7
#FeedbackLoop #outputCapacitor #AppNote #stability #ControlLoop
Professor in Electrical Engineering
5mothe birth of dc-dc power electronics conversion was really the aerospace industry, JPL and Caltech were dominant in this area in the 1970's, I was even Associate Editor from 2002 to 2006 in the IEEE Trans. on Aerospace and Electronic Systems, it is nice that NASA is again looking to this niche, but pretty much everything (as regarding topology and controls) have been already developed in the past 40+ years, maybe there are new semiconductors cutting-edge WBG transistors and diodes, maybe more compreheensive design tools, top-notch DSPs, FPGAs, silicon-computation, but the laws of Physics as regarding electrical power conversion with switching high frequency transistors and diodes, either in hard or soft switching has been immense, take a look at the many developments by Professor Fred Lee or Professor Ivo Barbi, and so many others.... so NASA must be aware, of course, that the technological foundation is already immense, the problem is that few young professionals nowadays really want to study and understand all these past 40+ years of wisdom.