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Constant Current in DER136

Posted by: Rajalakshmi on

Hi,

How R6 is selected in DER136 for constant current,explain in detail becoz some of the resistor in 1/4w and remaining in 3W?

Comments

Submitted by PI-Surak on 05/31/2011

R6 works with C10 to provide a low frequency filter so that the duty factor of modulator stays essentially constant of a high cycle period which improves power factor performance. R6 is not critical for CC function.

Submitted by Rajalakshmi on 05/31/2011

Really Sorry that is not R6, Resistor R11,R12,R13 is used for constant current that detail i want...

Submitted by Rajalakshmi on 05/31/2011

Really Sorry that is not R6, Resistor R11,R12,R13 is used for constant current that detail i want...