Have you ever heard of a swing? When you push the swing in just the right way, it goes higher and higher without you having to push it anymore. That's because you are pushing it at the right time and in the right way to make it move smoothly all on its own. That's a bit like what a resonant converter does.
A resonant converter is a device that helps to convert electronic energy from one form to another. It's like a magician's hat, where you put in a rabbit and out comes a hat. Only in this case, you put in one kind of electronic energy and out comes another kind of electronic energy.
Inside the resonant converter, there are some special parts that help to make the electronic energy move just like a swing. There is a special circuit that switches on and off very quickly, just like someone pushing the swing. And there is a special coil that can store and release energy, just like you building up energy to make the swing go higher.
When the circuit switches on, it sends energy into the coil, which stores it up. When the circuit switches off, the energy in the coil is released back into the circuit. This all happens in just the right way and at just the right time, so that the electronic energy moves smoothly and efficiently.
Just like how you can control the height of the swing by changing how you push it, the resonant converter can change the amount and type of electronic energy that comes out. This makes it very useful for things like powering electronics or charging batteries, because it can convert one type of energy into another type that is useful to us.
So, in summary, a resonant converter is a device that can convert electronic energy from one form to another, using special circuits and parts that work together like a swing. It's like a magician's hat, but with electronics instead of rabbits!