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RCC SMPS circuit modification
RCC SMPS circuit modification
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Old 20th September 2018, 05:35 PM   #1
indr is offline indr  India
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Default RCC SMPS circuit modification

How should I change the component values of this Ringing Choke converter smps circuit (op. 9v 230 ma) to get o/p of 5v 2A?
Needed for a portable class A amplifier.
There are mobile chargers of same rating but want to make it myself.
I already have a 5v 2a flyback transformer from a charger.
Replies sans rhetorics will be just fine.
Thanks.
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Old 20th September 2018, 09:18 PM   #2
Vovk Z is offline Vovk Z  Ukraine
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9 V x 0.23 A = 2 W, but you want to get 10 W. It can be too much...
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Old 20th September 2018, 09:34 PM   #3
voltwide is offline voltwide  Ireland
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For 2 amps you should consider a TO-220 rectifier mounted on some heatsink
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Old 21st September 2018, 07:23 AM   #4
indr is offline indr  India
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Quote:
Originally Posted by Vovk Z View Post
9 V x 0.23 A = 2 W, but you want to get 10 W. It can be too much...
Well, as far I figured out, the zener and Vbe holds the key, a 4.3 v solves one part, but for Vbe, R1 & R2 must be changed, but I dont have simulators, so this post.
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Old 21st September 2018, 07:25 AM   #5
indr is offline indr  India
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Quote:
Originally Posted by voltwide View Post
For 2 amps you should consider a TO-220 rectifier mounted on some heatsink
Yes, I have 13003/5 in mind, the metal casing would be a fine heatsink
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