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DLP5530S-Q1: Questions about environmental resistance

Arita Yoshiki
Prodigy 20 points
Part Number: DLP5530S-Q1
Other Parts Discussed in Thread: DLP3030PGUQ1EVM

Tool/software:

I am considering using automotive-grade DLP (DLP5530S-Q1 etc), for use in aircraft.

I have a few questions regarding this.

 

1. Storage Temperature

The storage temperature for the DLP is specified as -40°C, but some aircraft specifications require storage at -54°C. What potential issues might arise if stored at temperatures below -40°C?

2. Altitude

Some aircraft specifications require operation at altitudes of 50,000 ft or higher. Could altitude changes cause any problems? If possible, please provide any relevant data.

3. Sealing

Is the DLP completely sealed? If it is sealed, what type of gas is inside?

4. Vibration and Shock

Are there any specifications regarding vibration and shock ?

5. Flickering

We purchased the DLP3030PGUQ1EVM for evaluation. At room temperature, there were no issues, but at high temperatures (70-100°C), the image flickered occasionally. It didn't flicker constantly, but only intermittently. What could be the cause?

  • 0
    TI__Expert 3415 points

    Hello Yoshiki-san,

    #1 - see attached qual report.   We cannot guarantee and did not test long term storage at -55C.  However, we did run cycle testing from -55C to 125C.    If the duration of time at -55C is limited, then the impact is not likely to be significant.  However, you might need to complete your own evaluation testing.

    #2 - We have not completed any test at high altitude.  However, the devices are hermetically sealed, so likely there will not be any impact.

    #3 - Hermetically sealed.  We cannot disclose the internal gas content.

    #4 - Shock and Vibe see the tests that are completed in the qual report.

    #5 - There could be many reasons, but none of them are likely due to the DMD or controller robustness.  Potentially, the calibration of the LED control is not calculated correctly.  We have many systems in production that are tested up to 85C Ambient without issues.    Is the flickering something noticeable in a gray ramp image?   Or is the image completely turning off and back on?  Can you describe it in more detail?

    PPAP_EXTERNAL_Qual_Memo_DLP5530SAFYSQ1.pdf

  • 0 in reply to Jason Thompson
    Prodigy 20 points

    Hi　Jason

    Thank you for your answer.

    #1,4

    I would like to check the DLP qualification reports for other model numbers as well. Where can I find them?

    #5

    Here are the details of the situation:

    We placed the "DLP3030PGUQ1EVM" device in a temperature chamber and checked its display. Using the "DLPC120 Automotive Control Program Lite," we set the brightness to 200 and displayed a solid white image. We observed flickering, where the overall brightness fluctuated rapidly over short periods. With these settings, we did not observe any blanking issues (however, blanking issues were observed with lower brightness settings).

  • 0 in reply to Arita Yoshiki
    TI__Expert 3415 points

    Hello Yoshiki-san,

    For the QUal reports, these are normally provided with a PPAP request.  They are not stored live on the network.  However, all automotive grade DMDs follow the same basic qualification testing.  https://www.ti.com/support-quality/additional-information/automotive-ppap.html THis is the link to make a PPAP request.

    For the PGU, 200 is a very low level of brightness.  There is some limitations at these very low levels.  In other words, the PGUs operate over a very wide brightness range and normally in production calibration at the factory, the useable brightness range would be identified and might be higher than 200.  You might just try increasing the brightness to 1000.   These PGU EVMs may not have been fully calibrated.  The other possible solution is to complete go through the calibration process.  However, that is fairly complicated, so it may not be that useful to you for basic evaluation.  What are you trying to accomplish with your testing?

    https://dev.ti.com/tirex/explore/node?node=A__AVQv1zncy45ychOljt-qWA__DLP-AUTOMOTIVE-ACADEMY__OPCTO9o__LATEST This is a resource for the HUD calibration along with many other resources.  

    Jason