Dear Ti expert,
I am exploring the UCC28600EVM-65W and found below questions where need your help to clarify.
1) In my idea by adjusting the PWM duty cycle on Mosfet (Q1) gate is able to change the output of EVM. Can you share the calculation or method so that I am able adjust the PWM duty cycle EVM?
For example: Current output voltage is 18V and 70% duty cycle is applied. Then how am I able to adjust the duty cycle to 90% or 60% to so that it will give an increase or decrease of output voltage?
Q2. How to adjust the UCC28600 output PWM frequency in related with Mosfet (Q1)?
Q3. What is the function of below circuit? And how it work? (from EVM)
Q4. On the Optocouple feedback (U3), any specific type of optocoupler need to be used in flyback converter? If specific optocoupler is needed, then what is the criteria that we choose this specific optocoupler?
Q5. What is the difference between QR mode control and Green-mode Control?
Q6. Do you have any tutorial regards designing this type of power supply? Please share if any.