UCC5350-Q1: This device not given me the expected pulse

Hi, Ikenna,

I see you posted a separate post about the convergence, so I will let my colleagues work on that issue with you.

Let's take it a step backwards to simplify things. Can you power the secondary side off 15V and ground? Then, apply 5V to IN+ and check to make sure the output is high. Then, add you PWM generator back in and see if you get PWM between 15V and 0V. 

Let me know what happens after you try this.

Best regards,

Don

Hello Don,

What exactly do you mean when you say "power the secondary side off 15V and ground"? VCC2 is powered by 15V already.

Regards,

Ikenna

Hello Don, 

So I did it the exact way you asked me to do it, by connecting 5V to in+. Run the simulation and I am getting 15V at the output, and  I put back the PWM signal, I am getting -5V now at the output.

Regards,

Ikenna.

If you can set up a private chat. I can send you the circuit to run from your signal.

Hello Don,

The question here is why I am not getting a PWM signal when I probe IN+_4, but rather a 0V, despite the fact that this is my signal that I am feeding.

But when I probe it 0V.

Hi, Ikenna,

Excellent! So it looks like the issue is with your source and not the IC.

Please review this video to debug issues with your source: https://training.ti.com/configuring-sources-tina-titm-simulator

Best regards,

Don

Hello Don,

I have looked at the video. I still do not understand why it not generating 5V pulse at IN+_4 and 15pulse at the output. What I am getting at the output is -5V and 3.96mV at IN+_4. 

Regards,

Ikenna.

Hi, Ikenna,

Please reach out to the contact that Leonard gave your other thread for help with the generator.

Best regards,

Don