I wanted to design flyback converter. How to determine transformer specifications...IC to be used...etc. Vpri=5 V,Vsec=5V(8 secondaries),Isec=200mA each.
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19 years ago
multiple output flyback converter
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- posted
19 years ago
You might as well ask how to build your own helicopter.
John
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19 years ago
formatting link
Leon
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19 years ago
5V * 200mA * 8 = 8W this is quite posible with many chips
The input side current will be a few amps, lets say 5. Look for a chip that can handle that much.
Pretend that you have just one secondary with 1.6A of load and follow any of the many app-notes for doing that design.
You need a low leakage inductance in the transformer. This should work for you:
Your inductor will be a 1:1 so take 16 wires, form a wire rope, wind the inductor and then use 8 in parallel as the primary. Try to spread the primary windings evenly around in the wire rope and the 8 others as the secondary.
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