SEPIC CONVERTER Design_Coupling Capacitor

Prajeesh Kottinadath

Prodigy 135 points

Hello,

How to select the coupling capacitor in a sepic converter?

Also what is the effect when the coupling capacitor get short circuit? whether the output voltage will go down?

What will happen to secondary winding current?

Waiting for your reply.

Thnak you.

Prajeesh

over 7 years ago

0 Youhao Xi over 7 years ago

TI__Guru* 78270 points

The coupling capacitor should be able to handle large ripple current (all power is transferred through this cap to the load), and voltage rating should be greater than VIN max. A ceramic capacitor is usually selected.

There are many articles on designing the sepic. One example is at the following link.

www.ti.com/.../getliterature.tsp

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SEPIC CONVERTER Design_Coupling Capacitor