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Off line switcher ic

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ashrafalivk

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can anyone explain what is an off line switcher ic used in DC to DC converters?
thank you
 

Hi its like boost converter, It will have a MOSFET or BJT a high voltage switching device inside it and that will be clocked in a high frequency like 52khz, the switch will be connected series with a transformer on your need... The output duty cycle will depend on the feedback voltage.. And most of it will have a option like OFF/ON..

Look some typical switches you will get Total idea........
 
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