fly back problem

Posted by: ibrahim on 10/11/2009

my second experiment i take 12 volt but for ex.i take 2 a no sound on ferit transformer but if i take 500 mA transformer produce lots of parasitic sounds what can be problem

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We have an application note that helps solve this issue. It is available here: http://www.powerint.com/sites/default/files/product-docs/an24.pdf