I am measuring the output voltage through a little sample of the it (voltage divider), and then a isolated Oamp is connected. I would like to know if what I am doing is right:
The UCC3808A-2 has particularly 2 pins to place the compesation network: FB (Inverting input to the error amplifier) and Comp (Output of the error amplifier and the input of the PWM comparator).
The proportional component of the controller is implemented through a Oamp after the Isolated Oamp (this last has unitary gain). Then I have placed the derivative element, which is achieved with a RC in parallel, and it is connected to the FB pin; the integral component of the compensator is placed between FB and COMP as a RC series network (see Figure).
1. Is the PID well implemented?
2. Does the block diagram in the figure represent the previous mentioned configuration?
Thank you for your help.