How to test ili9488 touch display

Other Hardware Displays
21

If overall current is low - where should the energy to destroy the display come from?

Sorry - but you where wrong in the first place with the MOSFET - and now again there must be some mistake in your thoughts because I do not get 320mA. I don't know what's wrong with your calculation (only that I don't have a glue where the display should get 5V - I don't attach it to 5V since there is no pin for 5V) and I don't care (to be honest). I appreciate your help even it did not lead in any helpful direction. I can also not explain why my display works now but it didn't in the first place but honestly: what part do you have in that? Obviously your assumption that I need a resistor + MOSFET was wrong.

I am done with this topic. Yes - I have to live with my display's lifetime and I will.

22

You know it better? You mean Ohms law is wrong? What in the display regulate the current?

Have a good time. You're answers and questions are blocked for me.

23

No!
3.3V - 3.2V = 0,1V; 0,1 / 5.6 = 20ma

24

Is the CE transistor connection 0V and a super conductor? The datasheet say other things. Vce(sat) = 0,5V. See datasheet.

And the display background isn't 20mA but 6 times 20mA. See datasheet.

Screen Shot 03-08-23 at 05.25 PM
Screen Shot 03-08-23 at 05.25 PM1592×512 56.6 KB

And 120mA is very different from 20mA.

Since what century the transistor Vce(sat) no longer counts?
Since what century is 3,2V + 0,5V = 3,3V?

Now you may explain how you bring this together in Ohms law to give a resistor 5R6.

25

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