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Here is an LTspice sim showing what you have to do.
Keep your eye on the COMP pin...your loop injection shouldnt be so big that the COMP pin voltage goes to its rails.

The injection point should see high Z looking one way, and low Z looking the other way.
Unless its a type of injection method that doesnt require this of course (eg the way its recomended to do it on those powerint flyback chips)

[QUOTE="cupoftea, post: 1790538, member: 655016"] Here is an LTspice sim showing what you have to do. Keep your eye on the COMP pin...your loop injection shouldnt be so big that the COMP pin voltage goes to its rails. The injection point should see high Z looking one way, and low Z looking the other way. Unless its a type of injection method that doesnt require this of course (eg the way its recomended to do it on those powerint flyback chips) [/QUOTE]

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