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DMD Failure Modes at Cold Operation

Arthur Thompson
Prodigy 105 points
Other Parts Discussed in Thread: DLP5500

The DLP5500 has a minimum storage temperature (-40C) that's much lower than the minimum operating temperature (+10C).  Why is the operating temp requirement so different?  What is the failure mode referred to for operating below 10C?  (from datasheet note 5, "Micromirror Array can operate from 0 °C to 10 °C at power up for a maximum of 10 minutes without damage").

  • 0
    TI__Intellectual 2175 points

    Hi Arthur,

    The failure mode would be a non-operating micromirror that is defined as a micromirror unable to transition normally from the -12 degree position to +12 degree or versa.  Note 7, below the table of Recommended Operating Conditions applies to the operating temperature range as well.  To achieve the optimal, long-term performance of the Digital Micromirror Device (DMD) TI recommends the DLP5500 operates in temperatures above 10C and below 70C.  Other application-specific operating and environmental conditions also need to be considered. 

    We can discuss your application specific information in a private message.

    Eric

  • 0 in reply to ELD
    Prodigy 40 points

    Eric,

    My application requires a DLP (0.3 in. or 0.55 in. DMD) to operate at cold temperatures (refer to MIL-STD-810).

    Can we attach a TEC heater to the 0.3 inch (or 0.55 in.) DMD and keep T = ~ 10 C for the DMD package such that the DMD functions well in cold weathers (below 0 or -10 C)?

    Please advise.


    Thank you,

    Jun

  • 0 in reply to Jun Ai
    TI__Guru 54705 points

    Hello Jun,

    Welcome to the DLP section of the TI-E2E Community.

    Assuming you mean +10° C (not -10° C), from the DLP5500 datasheet, this would be acceptable operation for the 0.55" DMD.  The DLP3000 datasheet is a little less clear, but should be similar in operation.

    Optimally DMDs like 20° C, so if you can afford the extra but slight energy consumption to reach 20° C that would be ideal.

    Fizix

  • 0 in reply to Fizix
    Prodigy 40 points

    Fizix, thank you for reply.

    Is there any way to run the 0.55" or 0.3" DMD at -10° C or -20° C (below zero °C)?

    Jun

  • 0 in reply to Jun Ai
    TI__Guru 54705 points

    Hello Jun,

    Unfortunately this is not recommended operation. 

    Fizix