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???
11/11/07 14:30
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 		 #146858 - If making is a pain why noy buy it ?
Responding to: ???'s previous message
Hi Vignesh,

long time no hear ?

OK I have read through this thread.

- You need a switcher with conformance to tough specs / certifications, blah blah. I fully agree with Erik that its stupid to try and make one.

- You cannot use a wall wart as the client ( sadists as always! )wants you to make one.

Know what ? - just dial up that company who makes the most good wall warts and ask them to supply you the guts ( that is the internals without the casing, plug, pins cable etc )Once you have the "guts", it must not be difficult to get the package done and go for the certification.

This idea worked great when we wanted about 1000 nos of 24VDc switchers integrated into our end product. Not sure about your quantity though. If its a few numbers you ARE back to square ONE buddy...;-)

Have a nice Sunday.

Raghu

List of 32 messages in thread
TopicAuthorDate
AC Wall adapters - Power rating?            01/01/70 00:00      
   unreliable            01/01/70 00:00      
      PI Chips?            01/01/70 00:00      
         ti.com            01/01/70 00:00      
            Re:            01/01/70 00:00      
               what?            01/01/70 00:00      
   why not buy a wall-wart?            01/01/70 00:00      
      No Wall-wart because..            01/01/70 00:00      
         tell "the customer" ...            01/01/70 00:00      
            Certification..            01/01/70 00:00      
               rather            01/01/70 00:00      
                  agreed.            01/01/70 00:00      
                  Switchers are ALWAYS noisy!            01/01/70 00:00      
                     agreed agreed!            01/01/70 00:00      
                        You have to live with it            01/01/70 00:00      
                           But what is the method?            01/01/70 00:00      
                     Switchers are ALWAYS noisy!            01/01/70 00:00      
                        I only use them when I have to ...            01/01/70 00:00      
                           We don't have much of a choice, from time to time            01/01/70 00:00      
                              Of that there can be no doubt            01/01/70 00:00      
                     Of course, they are, but...            01/01/70 00:00      
   Do Not forget the Power Factor            01/01/70 00:00      
      PF for switchers?            01/01/70 00:00      
   Transformers also draw spiky currents!            01/01/70 00:00      
      Spiky currents!            01/01/70 00:00      
         There is a theory, but the way to go is...            01/01/70 00:00      
         EN61000-3-2            01/01/70 00:00      
            Power Factor            01/01/70 00:00      
               If making is a pain why noy buy it ?            01/01/70 00:00      
                  Vacation over!            01/01/70 00:00      
                     quantities            01/01/70 00:00      
                        Phihong            01/01/70 00:00      

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