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Densitron OLED Display question

KennyMillar

Hi

 

I'm designing a product which contains a DENSITRON DD12864YO-3A OLED display.

 

This display requires separate supplies for Logic  and Display

The logic supply is called VDD, and the Display supply is called VCC

 

And the datasheet says this about the VCC supply : This is the most positive voltage supply pin of the chip. It can be supplied externally or generated internally using internal DC/DC voltage convertor.

 

However, the data sheet does not mention how to enable the built in DC/DC convertor or how to select it.

 

Does anyone know how to enable the built in DC/DC for VCC on this device? Do I just leave PIN 23 (VCC) Floating and the device just knows to switch on the internal DC/DC?

 

The DD12864YO-3A display uses a solomon systech SSD1305 controller.

 

Thanks in advance!

 

-Kenny

Parents

  • I've used OLEDs before and come across the same issue... on-board DC-DC converter, however no clear information about the feature.

     

    When I did look into the option, it presented as a bad solution.  Having a buck switcher located a great distance from the schotty and inductor is a bad recipe. Particularly for emissions.  You are better off having a small low current buck converter to do the job, like a TPS61041DBVR.  This gives you the option to set the voltage to the display (which can be OLED colour dependant) as well as have the important on/off control to enable correct startup/shutdown procedures.

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  • I've used OLEDs before and come across the same issue... on-board DC-DC converter, however no clear information about the feature.

     

    When I did look into the option, it presented as a bad solution.  Having a buck switcher located a great distance from the schotty and inductor is a bad recipe. Particularly for emissions.  You are better off having a small low current buck converter to do the job, like a TPS61041DBVR.  This gives you the option to set the voltage to the display (which can be OLED colour dependant) as well as have the important on/off control to enable correct startup/shutdown procedures.

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