TL431A: confirmation of TL431's operating principles

Hirotaka Matsumoto

Part Number: TL431A

Hi all

Would you mind if we ask TL431?

Please refer to the attachmentfile.
Our customer would like to get TL431's operating principles(waveform) as the attachment file.
So,
Vout decreases -> REF decreases -> IKA increases

Kind regards,

Hirotaka Matsumoto

over 6 years ago

0 Marcoo Z over 6 years ago

TI__Mastermind 19370 points

Hi Hirotaka Matsumoto,

Can you reattach the file? It does not appear on the message.

-MZ

0 Hirotaka Matsumoto over 6 years ago in reply to Marcoo Z

Guru 27525 points

MZ san

We appologize that we forgot to attach the file.
20170731_TL431.pdf

Kind regards,

Hirotaka Matsumoto

0 Marcoo Z over 6 years ago in reply to Hirotaka Matsumoto

TI__Mastermind 19370 points

Hi Hirotaka Matsumoto,

We do not have graphs such as the one you attached because the operating principles depends on the configuration of TL431. For example if used as Figure 20 from the datasheet, an increase of Ika won’t change Vref much because the output FET takes most of the current. Most of the operating principles can be answered by looking at Figure 23.

-MZ

Power management

Power management forum

TL431A: confirmation of TL431's operating principles