The TI E2E™ design support forums will undergo maintenance from July 11 to July 13. If you need design support during this time, open a new support request with our customer support center.
A related question is a question created from another question. When the related question is created, it will be automatically linked to the original question.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
The main compensation of an isolated flyback is done on the secondary side at the TL431 voltage reference. However, in some cases, RCOMP and CCOMP on the primary side are also needed. RLED is responsible for the mid band gain (AVM). If the needed value for RLED is higher than the maximum possible RLED (depending on the optocoupler, Vout and the voltage reference), RCOMP (on primary side) has to be used. CCOMP on the primary side influences the high frequency pole, as it is in parallel to Copto.
Please note, that the values for Rcomp and Ccomp on the primary side dont have to be the same like Rcomp and Ccomp on the secondary side. They are independed from each other.
