What is the function of the coupling capacitor in the middle of SEPIC?

小太阳yy

What is the function of the coupling capacitor in the middle of SEPIC? [Copy link]

 

What is the function of the coupling capacitor in the middle of the SEPIC? How do I calculate the capacity of this capacitor? And why is the maximum withstand voltage of this capacitor VIN?

maychang

[What is the function of the coupling capacitor in the middle of SEPIC? How do I calculate the capacity of this capacitor? ]

This cannot be explained in just a sentence or two. Each stage of the SEPIC switching circuit must be described clearly.

I recommend reading a book that introduces the various topologies of switching power supplies. I will post an electronic version later.

maychang

双向直流变换器.pdf (4.1 MB, downloads: 7)

2024-4-20 19:58 上传

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Chapter 2, Section 1 of this book describes the working principles of six basic non-isolated topologies.

小太阳yy

maychang posted on 2024-4-20 20:00 The first section of Chapter 2 of this book describes the working principles of six non-isolated basic topologies.

Thanks. I read in some books that increasing the capacitance of the capacitor can reduce the ripple voltage. So where exactly is the ripple voltage reduced? I am a little confused about connecting the capacitor in series to the circuit. Also, does the highest voltage on it have nothing to do with the output voltage? I am a little confused.