TL431LI: About figure 7-3, 7-4

Ryoma Ohashi

Part Number: TL431LI

Hi team,

In the figure 7-3 and 7-4, it says VKA=VREF at the lef top of the graph.

But VKA is variable in the charactoristic.

What does VKA=VREF means in this grapf?

Does it mean VKA_max=VREF?

Also, I want a explaination for the meaning/ difference of this two figures.

Regards,

Ohashi

0 Ryoma Ohashi over 1 year ago

I got that the difference was the scale for the IKA is different(mA & uA).

I have an additional question to clarify my understanding.

When VKA>VREF, does the internal opamp saturate?

I want to understand how the device works at VKA>VREF

Regards,

Ohashi

0 Trailokya Rai over 1 year ago in reply to Ryoma Ohashi

Hi Ryoma

VKA > Vref will have below inaccuracy

* VREF curve scaled to VKA

* Del VREF/ Del VKA spec

and inaccuracy from resistor diveder .

Regards

Trailokya

0 Ryoma Ohashi over 1 year ago in reply to Trailokya Rai

Hi Trailokya,

Thanks for the reply.

I got the point that you should consider about the inaccuracy when VKA>VREF.

How about Imin?

Is there any fomula or specification for the I_min when VKA>VREF

Regards,

Ohashi

+1 Trailokya Rai over 1 year ago in reply to Ryoma Ohashi

Ryoma

I min will remain same. You have to take care of currentr the current through R1 and R2.

Regards

Trailokya

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