Hello Sir,
I am into academics stream working on a project related to "digital current control of PSFB converter".
I was going through the application note "PSFB Control using C2000 microcontrollers" by Hrishikesh Nene - SPRABR1 May 2013.
i am also going through the source code provided with the application note.Thanks for developing this application.
I have few questions.
1) Referring to Figure 12 PCMC Waveforms,when Q1 and Q3 are conducting,the primary current increases.
When the current reaches the peak current reference,Q3 is reset and then Q2 is set after a programmable dead time.
In the source code, i can find the use of TZCTL register which resets the Q3 switch.From the PWM architecture of 28027 device,i notice that the dead time cannot be applied to a trip event occuring out of comparator.In such a scenario, how do u set the Q2 switch after a programmable dead time for a trip event without writing code in ISR?
In the source code, AQCTLA register is used to turn ON the Q2 switch. But Q2 is set only at the beginning of next half cycle as per the source code.I dont find any ISR associated with trip event too.Can u please explain how did u turn ON Q2 after a trip event.
With Regards,
Srinath R.