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Transformer pinout/connections on LNK501 Design DI-18 EPR-16

Posted by: curtisg on
I'm using pins 1&4 on the primary of the transformer in PI DI-18 EPR-16 5.5V 2.75W LNK501 design. Am I supposed to be connecting to pins 1&3 instead? thanks.

Comments

Submitted by PI-Spock on 09/22/2008

The short answer is YES.
When you connect from pins 1 to 2 you have 12 more turns as compared to pin 1 to 4. That means your primary inductance as well as VOR will be slightly higher when you connect from pin 1 to 3