Hi everybody
I want to start working with SMPS (Switching Mode Power Supply) But I don't know how I should start.
would you please show me the way?
I prefer to start by a simple circuit and simulate it at first then I test it in practice.What is your idea?
What is the right software for simulating switching circuits?
- - - Updated - - -
Recently I found a circuit for Cell Phone Battery Charger with the output of 5V/1A. The circuit attached.
I start simulate it with Orcad(Pspice) but there was some errors which I couldn't solve them.
my problem are:
1.How I should simulate transformer?
2.I can't find the optocupler which has simulation ability in Orcad libraries.What should I do?
3.Is it important to mention the power of resistors and voltage of electrolytic capacitors in simulation? If yes, How?
An animated interactive simulator is helpful to further the learning process. See the thread below where I put posts about the buck, boost, and buck-boost converters.
They include links which allow you to run the same schematics in my posts. They make use of Falstad's simulator (Java applet).
download ltspice and look at the made up simulations, that they call test jigs, of switchmode power supplies. All you have to do is open the file and hit the running man icon
The inductor is the heart of the action. And the action is complicated. If a picture is worth a thousand words, then a video is worth a million.
My Youtube video animates the action, making it easier to understand. It depicts current flow through the circuit. It portrays the inductor's flux field building and collapsing. It portrays counter-emf as a lug (or something with inertia), rattling back and forth.
It isn't interactive, of course. (Unless you're at my PowerMac, playing with my one-of-a-kind homebrew simulation program.)
Then you must start designing and laying out and making it now. Do not wait until you think you have filled your head with enough knowledge. None of us will ever know it all. We only learn by doing it in SMPS, and electronics as a whole. Do it, wear your safety glasses (!!!!), put fuses on everything, and just do it. Don't touch it whilst its switched on, till you know what you are doing