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Power Consumption of DLPC410 and DLPA200

Florian Wechsung
Prodigy 10 points
Other Parts Discussed in Thread: DLP7000, DLPC410, DLPA200

Hello,

I am currently doing some research for a company into very low powered cameras and we are interested in Single Pixel Cameras using DMDs. The DMD I am particularly interested in is the DLP7000 because of its high refresh rate. I have been researching power figures for a while now but am still a bit confused, probably because my background is more on the maths side and not on the engineering side of things. It would be great if you could clarify some things so that we can decide whether your DMDs are the way to go for us.

Our scenario is roughly the following: we have 3000 distinct patterns for the DMD stored on some memory, these patterns should be repeated over and over again on the DMD. The mirrors then reflect the light onto a photodiode and we measure the incoming light and transmit the intensities. 

  1. I can't find power consumption figures for the DLP7000. Numbers for other DMDs range between 10mW and 1700mW and I am a bit confused as to where these massive differences come from.
  2. The development kit consists of DLP7000, the Driver DLPA 200, a PROM DLPR410 and a controller DLPC410. Of these devices, the controller seems to use by far the most power (1200mW). If I understand correctly, this controller is usually responsible for receiving images and turning them into DMD patterns. If we have the patterns already stored somewhere, will the controller still consume that much power? Or is it necessary at all? 
  3. Is the power consumption of the driver DLPA200 dependent on the number of mirrors that we switch per second? Meaning: if I keep the DMD pattern constant for a while or only change a smaller number of mirrors, will the DLPA200 consume less power then?

Thank you very much in advance,
Florian Wechsung

  • 0
    TI__Expert 6370 points
    Hi Florian,

    Welcome to the E2E forum! I apologize for the delay in response!

    1) The power consumption for the DLP7000 is not provided because it can vary quite a bit depending on your use-case, much like our other chips (more on this later).
    2) For the DLP7000 chipset, all four of the chips you listed (DLP7000, DLPA200, DLPR410, and DLPC410) are required for reliable operation. The controller, the DLPC410 not only passes image information to the DMD, it is responsible for all communication and operations of the DMD. Pre-storing the patterns somewhere should not have a noticeable effect on the power consumption of the DLPC410, which must be used for sending image data to the DMD in a way that the DMD "understands." However, the way you use the patterns: speed, etc. will impact the DLPC410's power consumption.
    3) As alluded to above, power consumption is very much dependent on your use case for all of our devices including the DLPA200. You are definitely on the right track above. Switching at slower speeds, or resetting fewer blocks of the DMD should result in less power consumption from the DLPA200.

    Best regards,
    Trevor