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Feedback loop compensation of a current-mode Flyback converter with optocoupler

Feedback loop compensation of a current-mode Flyback converter with optocoupler

By Wuerth Elektronik eiSos



The flyback converter is an isolated power supply topology widely used for output power levels below 150 W. Isolated flyback converters often use optocouplers in the feedback loop to regulate the output voltage. As part of the compensation circuit, its parameters such as CTR influence the control loop and must be taken into account in the flyback converter design. This White Paper provides an example procedure for designing the feedback loop compensation of a flyback converter with current-mode control and optocoupler-based feedback.

 

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