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Thomas Ranz
Associate II
since ‎2018-07-19
‎2023-06-14

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  • 8 Posts
  • 1 Solutions
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User Activity

How to determine a SMPS NTC, EMI Filter and X2 Cap values?

2017-03-25
Posted on March 25, 2017 at 19:28Hi:I have designed a smps using eDesignSuite with a VIPer38LE chip... the Power In is 11.1 watts, 96-144 Vac, 60hz and will run at 60KHZ.  Is there a method for determining the recommended filter components being X2 ...

What are the formulas for determining Lp for VIPer38LE SMPS?

2017-03-13
Posted on March 13, 2017 at 14:32I've used the eDesignSuite to design a power supply using a VIPer38LE.  I'm verifying results and I'm having difficulty getting to the same primary inductance the design suite is.  Can someone get that info to me?  I...

Is there a preferred tool to get from transformer specs to actual part?

2017-03-07
Posted on March 07, 2017 at 23:06HI:I've designed a SMPS with a viper controller, 3 outputs.  Is there a preferred way/tool to apply the design parameters to make an actual flyback transformer?  Magnetics has never been my strong area.Thanks!  Tom

Turns Ratio Notation 'm'

2017-03-07
Posted on March 07, 2017 at 15:21HI:I'm using the eDesignSuite to design an AC/DC transformer that has a secondary at 135 vdc, 40 Iavg.  The listed turns ratio is 550.26m .... why the 'm' ?Here are the transformer details:Transformer Specifications:...
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