Dear all,
I've been working on a SEPIC project and I have been using PSpice for TI normally for over a month, only until yesterday, all of a sudden, it started to not work properly.
I wanted to simulated the start-up of a 15V SEPIC as I have done over a hundred times before, but it was shutdown abnormally.
I have tried to restart the application and even the computer, and I came back to the office after a day and it still doesn't work as it used to.
Figure 1 to 3 are some screenshots you may find useful.
Figure 1 - 15V 0.3A SEPIC circuit with 13.5V Vin
Figure 2 - Simulation from a few days ago where the output voltage (red) climbs up and settled at the target 15V
Figure 3 - Simulation from this morning (similar to last evening) where the output voltage (red) climbs up only half way and the entire system started to shutdown in a transient manner
I have also checked all other components and their values should all be within normal operating ranges. I am glad to provide a detailed component list if that would be more useful, but I haven't changed the values much between the normal and the abnormal simulations.
Your swift response will make my day.
Cheers,
Hubert
