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capacitors burning in DC/DC converter

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Hi
Anyone have idea on why capacitors (input or output) burn in a DC/DC converter?
 

Depends on what type of capacitors they are and what their function in the circuit is. Most likely causes are excessive voltage and ripple current.
 
They are electrolytic capacitors. Could you plz explain why ripple current causes burning?? How much ripple causes burning say for a 1000uF, 50V capacitor?
 

Ripple current causes heating due to ohmic and dielectric losses in the capacitor. The ripple current that a capacitor can handle is very dependent on its construction and quality, not simply its rated capacitance and voltage. You should consult the datasheet for the specific part to find out what ripple current it's specified for.
 

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