Bias winding voltage for TOPSwitch-GX family

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Hi There

Could anyone let me know what the voltage on the transformer bias winding should be for the TOPSwitch-GX family (EG TOP249Y). This is the raw winding voltage before the rectifier, opto-isolator etc.

Many thanks

Hi RichWH,

Thank you for considering PI products.
The suggested bias winding voltage can be found in the PIExpert spreadsheet.
You can design your power supply by using the PIExpert spreadsheet, please use the link below:

Please let us know if you have any further questions.
Thank you again for considering PI products.
Thank you!