DLP4500: Maximum Input Power

Hunter Brown

Part Number: DLP4500

Could anyone point to a relevant apps note that contains a walkthrough of the calculations used to determine a maximum input power in W/cm^2 for the DLP 4500 device? I've seen numbers ranging from 25 W/cm^2 to 10mW/cm^2 dependent on wavelength for various other products, but would like to verify my own model and ensure I've got it correct.

over 5 years ago

0 Philippe Dollo over 5 years ago

TI__Mastermind 28005 points

Hunter,

Are you referring to the DMD input power in the environmental specification? What wavelengths are you evaluating in your case?

Regards,

Philippe Dollo

0 Hunter Brown over 5 years ago in reply to Philippe Dollo

Prodigy 60 points

Hi Philippe,

No, I am trying to understand and model the input illumination power limit for an FQD type device using a laser in the visible spectrum. I see that the W/cm^2 limit will be thermally limited(7.4- Illumination), but I don't have a great understanding of how much power will be absorbed by the DMD. Are there specific apps notes that contain the absorption spectrum for the mirrors/coatings?

Regards,

Hunter

0 Hirak Biswas over 5 years ago in reply to Hunter Brown

TI__Genius 10925 points

Hi Hunter,

Kindly provide us some time to get this information for you. Thanks For your patience.

Thanks & Regards,

Hirak.

0 Vivek Thakur over 5 years ago in reply to Hirak Biswas

TI__Mastermind 23130 points

Hello Hunter,

Thank you for your patience. Unfortunately, we do not have application note on calculating maximum power input for a DMD device. You are asking for

"how much power will be absorbed by the DMD" to develop your own model.

Please refer to the following application notes on DMD optical efficiency :

https://www.ti.com/lit/an/dlpa083a/dlpa083a.pdf

The DLP4500 DMD is based on 7.5 micron pixel node. The typical DMD efficiency for visible spectrum is around ~ 66-67%. For model purpose, I will assume loss is absorbed in the DMD i.e. 33-34% of incident light is absorbed in the DMD.

Hope this answers your question.

regards,

Vivek

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DLP4500: Maximum Input Power