SMPS


David Jones <david.g6feo@...>
 

Dear Group,
 
Can anybody help me with a SMPS problem?
 
I have two faulty Duvine DD666 48V 11A power supplies, both have failed in the same way, failure of surface mount components around the Texas Instruments chip UC3854A.
 
The UC3854A is used as 'Power Factor Correction', the circuitry looks very similar to the documents downloaded from the TI site.
 
If I remove the UC3854A and it's associated components and apply rectified and smothed mains to the switchmode board, is it going to work?
 
Thanks for any help or advice.
 
David.
 

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