parameters of the transformer

[PINI BITON]

Posted on August 20, 2017 at 16:20

Hi

my name is pini i work on new project AC/DC converter

the input is 85-265 VAC

output  12vdc/350mA

axiliry :16vdc

chip:viper013HS

I work with a midcom transformer 750370024 and viper013hs 

I don't how to set this transformer in simulate (how to enter the parameters)

this is EE13/7/4 but

I do not have all the

parameters of the transformer 

How can i run the simulation correctly?

thanks

[Patrizia BELLITTO]

Posted on August 21, 2017 at 10:21

Hello,

I forwarded your question directly to the Wurth Product application engineer, who can answer in the best and most complete way.

He should be in vacation, he will answer you as soon as possible.

Best regards

[Emil Nierges]

Posted on September 05, 2017 at 10:35

Hello Pini,

Already answer to you on private. However, I would like to also answer here in case that someone else is looking in to similar situation:

For your simulation in eDS you need the following parameters for the transformer:

From datasheet:

Main inductance: 1.6mH

Leakage inductance: ~40uH

Turns ratio Pri:Sec = 8:1 => reflected voltage = 8*12.6V=100.8V assuming a 0.6V drop voltage on the output diode.

Here are the steps though eDS that I went through:

As you can see, for the simulation purposes, the transformer internal construction is not really needed as long as the transformer parameters are given along with the condition that peak current to be lower that the transformer saturation current:

Best regards,

Emil