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???
02/23/10 12:39
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 		 #173465 - SCR dI/dt limiting
Responding to: ???'s previous message
Kiran V. Sutar said:
In SCR/TRIAC Application: you are using it to limit dI/dt rating ... how does a thermistor fit into this ?

I'm not convinced that it does - where did that "Rule 8" come from?

But, again, it's basically about "inrush" current...


The fact is, I do not know the theory of using the thermistor for SCR/TRIAC or even the SMPS application.

Sounds like you need some basic study or, preferably, training there, then?

As Erik often says, switch-mode PSU design is not trivial; it's not something that you can just pick up from a few posts on a forum.
You need to either commit to some extended learning & practice, or buy-in ready-made units.


List of 26 messages in thread
TopicAuthorDate
Current Rating of Thermistor/Inductor            01/01/70 00:00      
   NTC or PTC ?            01/01/70 00:00      
      Thanks Andy            01/01/70 00:00      
         PTC.            01/01/70 00:00      
            How will a thermistor LIMIT inrush current ?            01/01/70 00:00      
         SCR dI/dt limiting            01/01/70 00:00      
            Magic bit            01/01/70 00:00      
            Rule 8 comes from here...            01/01/70 00:00      
         RE: I never read anything about this            01/01/70 00:00      
         There are many types of "thermistor"            01/01/70 00:00      
   Thanks Steve and Andy            01/01/70 00:00      
      That's probably the safest route            01/01/70 00:00      
   SCK NTC series...            01/01/70 00:00      
      That's probably not a good idea, unless...            01/01/70 00:00      
      Thanks Kai...            01/01/70 00:00      
         No, you have it exactly the wrong way around!            01/01/70 00:00      
            Would any other NTC do the job..?            01/01/70 00:00      
            Hint: cause of "inrush"            01/01/70 00:00      
               The great White light NOW struck me !!!            01/01/70 00:00      
         NTC versus PTC...            01/01/70 00:00      
            NTC or PTC?            01/01/70 00:00      
               Or by other words...            01/01/70 00:00      
                  Is that really true?            01/01/70 00:00      
                     What I meant...            01/01/70 00:00      
                        It's all about conserving energy            01/01/70 00:00      
   An informative link for In-rush current            01/01/70 00:00      

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