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Topswitch-gx device is not Loading

Posted by: rd1989 on

Led Driver designed for 52V,700mA,for no load it gives 60V Output,but on Resistive load of 80R it gives only Vo=20V,Io=230mA,what may be the reasons for this,i checked the widings direction,Inductance,but its the same,can you please provide me the solution as eearliest please,

 

Herewith attaching design File & Transformer Document 

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36w Design File.PDF 337.29 KB

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Submitted by PI-Jono on 10/30/2012

Hi,

Verify the actual output current for an LED load.  It should match with a resistive load.

 

If it is not 700mA, adjust the bias of the transistors.

 

Regards...