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11/26/11 16:57
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 		 #184912 - But the article claims it...
Responding to: ???'s previous message
Erik said:
as I said in my first post: there is no one solution and the situation described in the article is handled better with a switcher.

But the article claims:

"In addition, power modules like those discussed here can provide an output voltage with ripple-and-noise that rivals and in some cases bests a linear regulator."

Meant is here the LMZ10500. And this is plain bogus! The LMZ10500 generates a 2MHz ripple of 5mVpp with really nasty, far reaching harmonics. I don't know of any linear regulator which produces such a nasty ripple.

The LMZ10500 can only be better than a linear regulator, if at all, if you make a design mistake with the linear regulator. But this is no proof, that the switcher is better. You must treat and handle them both as they are intended to be handled. And then the switcher definitely produces more ripple!

Kai Klaas

List of 26 messages in thread
TopicAuthorDate
a myth debunked ?            01/01/70 00:00      
   Same old?            01/01/70 00:00      
   Hhm...            01/01/70 00:00      
      no, I did not            01/01/70 00:00      
         Babble of marketing people...            01/01/70 00:00      
            read it all            01/01/70 00:00      
               There's no need for HF-ripple rejection...            01/01/70 00:00      
               ... what's more important ...            01/01/70 00:00      
                  whatever            01/01/70 00:00      
                     But the article claims it...            01/01/70 00:00      
                        even the article states            01/01/70 00:00      
                           Switchers ARE beautiful...            01/01/70 00:00      
                        do linear regulators ever "produce" ripple?            01/01/70 00:00      
                           getting more and more irrevelant            01/01/70 00:00      
                              Perhaps, but where else would ripple originate?            01/01/70 00:00      
                                 still missing the point            01/01/70 00:00      
                                    Why do you see this as "becoming more mandatory"?            01/01/70 00:00      
                                       you can't do PFC without            01/01/70 00:00      
                                          Vice versa...            01/01/70 00:00      
                                             Not so fast            01/01/70 00:00      
                                          fortunately, PSU's are not on my deliverables list            01/01/70 00:00      
                                       I'm with Eric            01/01/70 00:00      
                                          Disadvantage of switched-mode supplies...            01/01/70 00:00      
                                             Huge crest factor            01/01/70 00:00      
                                                Numbers...            01/01/70 00:00      
                           It depends on load            01/01/70 00:00      

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