Hello, I want to design a SMPS with an input of 220V 50Hz, an output of 12V 10A. Can you help please choose the topology? Which will be simpler? Which is more effective? And can you help to choose the conversion frequency?
Re: 12V 10A smps. please help me to choose topology
CataM, I used/modified the transformer from another design with a single switch and snubber. I forgot to remove that, since there is no need for a snubber with the dual switch. Sometimes it is necessary to damp the output filter with an additional RC combination to prevent ringing at start-up. I updated the previous diagram now.
I understand that this simulation is merely conceptual since the components used are ideal, but now that we brought up the snubber topic, I think there is a need for snubber across the secondary diode which does not have a name in your schematic.
Re: 12V 10A smps. please help me to choose topology
I agree there may be instances where you need a snubber across the diode to prevent reverse breakdown due to ringing. For safety in this application, you will typically use a 150 V schottky or 200 V ultra fast diode.That is one reason we see more designs start to use SiC diodes, to do away for the need for snubbing over the diodes.