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Backlight chip for NHD‐4.3‐480272EF‐ATXL#‐CTP | BBB

Hi guys.
 
Recently, I owned proudly a New-Haven-Display which is called NHD‐4.3‐480272EF‐ATXL#‐CTP and I would like to run it with a PWM signal of the BeagleBoneBlack.
The following link shows the display documentation: www.newhavendisplay.com/.../NHD-4.3-480272EF-ATXL-CTP.pdf
Since I cannot start the display, I suppose that there is still missing a LED backlight block in my setup.
Unfortunately, I do not know which of the following blocks I do have to choose: www.ti.com/.../viewdevices.tsp;blockId=12748&designOptionId=24198&appId=476 so far my research...
Currently, I am using the BeagleBoneBlack. Its documentation says that I have a 5V and a 3.3V input currency.
The display documentation says that the backlight anode (40mA @ 19.2V) can get max 22V...
The display has: 12‐LED backlight.
The PWM pin is coming from the BeagleBoneBlack and gives max 3.3V.
 
I think I must choose between these three:
 
Am I on the right way?
If yes: I would like to take the Speed Chip.
 
Could someone please give me an advice? Have I missed anything else?
If you need more information just tell me what you need ;)
Thank you very much for your help.