Power ManagementのトピックRe: Tea1733 supply voltage

Tea1733 supply voltage

Justin_just — Fri, 17 Oct 2025 10:29:35 GMT

https://www.nxp.com/docs/en/application-note/AN10868.pdf
TEA1733 ic on when vcc startup voltage is 20.6V , you can check from URL .

-My question is what is the output of the auxiliary voltage here ?

-Is vcc startup voltage of the IC same as flyback transformer auxiliary output ?or 24v is the auxiliary output?

With Regards,

Re: Tea1733 supply voltage

ErikaC — Mon, 20 Oct 2025 19:07:12 GMT

Hello,

Vstartup (20.6 V) is the minimum voltage required for the IC to begin operation. The auxiliary winding must provide a voltage higher than Vstartup to ensure stable and continuous operation of the chip.

Re: Tea1733 supply voltage

Justin_just — Wed, 22 Oct 2025 05:31:46 GMT

Thank you @ErikaC .
This solved my issue.