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DT070BTFT-PTS1 LCD module Sequencing

Hi, 

I have designed an automotive system which includes DT070BTFT-PTS1 7 inch LCD display.

As per the datasheet, VGH applying to the LCD only after the DVDD, AVDD and VGL.

But in our design, there is a 12V in the VGH rail before the AVDD and VGL.

power sequencing in our design is attached below.

could you please check and confirm, if there have any possibility to damage the LCD display, by the sequencing mistake.

Replies

engineering_seacomp's picture
engineering_seacomp
November 28, 2017

Hi,

You need to sequence it according to the datasheet.

I suggest you use TPS65105PWPR

http://www.ti.com/lit/ds/symlink/tps65100.pdf

What is important, is that VGH is done after AVDD and VGL.

With TPS65105PWPR, V01=VADD, V02=VGL, V03=VGH, VCOM=VCOM.  DVDD is obviously applied first.

As you already know, the correct sequence is in the datasheet:

https://www.screencast.com/t/KPtS11jiyu