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Discharging the capacitor

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SurekhaIris

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In L6562AD PFC ckt , 200uF/450v Electrolytic cap at the PFC o/p takes longer time to discharge when we switch OFF the mains in No load / no lamp condition. .

Switching on the mains while Cap is discharging gives high voltage spike and also hissing noise which may damage our HID ckt.

Please suggest me how i dischage the capacitor.
 

ea.arun

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The resistors used for the output voltage feedback will basically act as a bleeder.I think you can tune those resistor values to get a better discharge characteristics.

Regards
EA
 

SurekhaIris

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i hv tried with resistor for diff value many times,bt still it is nt able to discharge the cap.

If their is another solution please help me out.
 

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