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Typical Application Circuit for TLC59283

Inge
Prodigy 80 points

Hi all!

How it work(circled part of scheme) ?

What part-numbers are recommended(diodе/transistor/their characteristics)?

BR,

Inge

  • 0
    TI__Intellectual 955 points

    Hello Inge,

    The Zenner diode is attached in order to avoid that the LED anode voltage goes GND level.  LED is sensitive to reverse voltage bias. The reverse voltage can be reduce by the zener diode. Big current zener diode is not required. But the diode maximum current should be more than VLED/resistor value. Zener voltage should be less than LED forward voltage.

    Best regards,

    Kazuya Nakai.

     

      

     

     

     

  • 0 in reply to Kazuya Nakai
    Prodigy 230 points

    Hi all,

    when we want to have a zener as voltage regulator we normally use this configuration:

    Why in this case do you use a resistor in series with the zener? I can't see very clearly how does your configuration work? Can you show me an exaple?

    Thanks and regards