How to simulate APEX SA03?

[Fangel]

Hello my friends,

          I want to test APEX SA03 (The SA03 is a pulse width amplifier that can supply 3000W
to the load.) in Multisim power pro.

          However, there is no relevant spice model in Multisim power pro, so I download a spice model in web. but it's format is *.LIB.   I may open it by notepad.

IF I swap it's suffix  for *.cir, would our multisim go wrong?  

There is a test circuit for SA03 in sa03.zip      

There is SA03.LIB in sa03.zip

                          Thank you for your help!

[nestor-sg]

From the ".lib" file you can open it in notepad, and the model you need is between the .SUBCKT line and the .ENDS line, everything with a * preceding the line means a comment, so you can either ignore or include... I would recommend to include but sometimes they give trouble...

To create the component please follow our Tutorial: Creating a Custom Component with in NI Multisim, if you have any questions after going through the tutorial you can post them here, or contact support at ni.com/ask.

[Fangel]

Nestor，Thank you!

         I have already done according to Tutorial which you offer, but my circuit's results (output) go wrong ultimately, I don't know what  is  wrong?

Help me check up my circuit,please!

                                                                                                          谢谢您！(Chinese)= Thanks you！

帖子被Fangel在03-17-2008 09:00 PM时编辑过了

[Fangel]

My friends,

         Please help me to check up my circuit and the spice model of SAA components. Tell me why are its results wrong?

This is a simple application ,but unfortunately I can't do right.

[nestor-sg]

Fangel, the component is correctly created. I looked at this circuit and I made changes:

1. R1 has to be 10k according to the datasheet you attached.

2. Input -PWM must be "floating", not grounded. So I deleted the GND terminal and net... and then created a new net coming out of -PWM and just ending in mid-air.

3. Ground channel B of the scope.

4. Deleted the scope attached to the CLK inputs. (instruments introduce components into the circuit)

I run the circuit and it shows a beautiful PWM coming out...