Can I simulate my compensation network before hardware testing?
Answer: Yes! You can simulate your compensation network before hardware testing, Tools like LTspice® are great for this. They allow you to:
- Run Bode plot analysis to check gain and phase margin.
- Model loop gain, including effects from components like optocouplers (e.g., current transfer ratio and bandwidth limitations)
How does the optocoupler affect my compensation design?
Answer: Optocouplers introduce a low-frequency pole and potential nonlinearity.
When placing compensation zeros and poles, make sure to consider the optocoupler’s bandwidth, CTR drift, and delay. These can affect your system’s stability and performance.
View the complete article 
Compensation Network Design in Isolated SMPS Feedback Loops
Understanding Optocoupler Biasing for Stable Isolated SMPS Feedback