UCC2891: use zener Di for VIN at Lo line AC input

Hiroshi Doi35

Expert 2845 points

Part Number: UCC2891
Other Parts Discussed in Thread: UCC2897A,

Hi all,

I need quickly reply.

PMP6661 circuit shows D10 100V zener diode between UCC2897A VIN and Bridge diode. (AC input 109V to 132V)

www.ti.com/.../slur498.pdf

Can this method be used for UCC2891 (AC input 90V to 138V )?

If yes, ?? V zener diode, do you recommend?

Best Regards,

H.DOI

over 7 years ago

0 Benjamin Lough over 7 years ago

TI__Mastermind 27135 points

Hi Hiroshi-san,

Thanks for your interest in UCC2891. You can use this approach to supply the Vin pin of UCC2891. 100V zener is appropriate. You will need to keep the maximum voltage of the Vin pin to less than 110V.

Best Regards,
Ben Lough

Power management

Power management forum

UCC2891: use zener Di for VIN at Lo line AC input