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DLP9000X: illumination power

Part Number: DLP9000X
Other Parts Discussed in Thread: DLPC910, , DLP9000

Hi,

  I have a dlp product-----v-9001 from Vialux,whose chipset is dlp9000x and dlpc910. It is the visible version,so the illumination wave length is 400-700nm,and the damage ilumination is limited to 25w/cm^2. I want to know the damage illumination power with the wavelenghth 750nm. Is it much lower than 25w/cm^2? 

  • Hello Peter,

    Please refer to the latest data sheet for the DLP9000X revision B.  The wavelength illumination was split into 400 - 420 nm and 420 - 700 nm (see page 13 in the "Recommended Operating Conditions" table).  In the 420 - 700 nm range it is now specified as "thermally limited".  Page 14 at the end of that table specifies that the limit is 10 mW/cm^2 for illumination < 400 nm or > 700 nm.

    Operation outside the specifications of the data sheet are not guaranteed, therefore you would be doing so at your own risk.  WIth that disclaimer, if you can keep the array temperature within the specifications it is likely to be OK, but TI will not warranty the part.

    Fizix

    P.S.  We changed the specification to thermally limited, because customers were focusing on the power limit and ignoring the array temperature (i.e. not providing a sufficient thermal solution).

  • Thank you for your reply,I notice the different specifictions of window temperature between dlp9000 and dlp9000x(see page 13,the dlp9000 is 10-70℃ while dlp9000x is 10-40℃ ).Does that mean the maximal illumination power density of dlp9000x is much less than other product?
  • Hello Peter,

    You rightly observe that for the same thermal solution a DLP9000 will be able to sustain a higher illumination density than a DLP9000X.  This is because the DLP9000X can run at 480 MHz clock rate and therefore produces more heat at the array from the underlying circuitry.  It also means (as noted in table note #19) that the duty cycle derating curve is not applicable to the DLP9000X since the array temperature is limited to 40 °C.

    I hope this helps.

    Fizix

  • I think it is a complex problem,but   it may be simple in our experiment. We want to illuminate the dlp9000x with continous laser at 750nm ,and the pattern is 1bit depth, the illunination last at least 1second every 20seconds . Is the 25w/cm^2 is too high for dlp9000x?

  • Peter,

    This operation is likely to be OK as long as you provide a decent thermal solution.  The main test you need to run is to illuminate it with the 25 W/cm^2 for 1 second and measure the max temperature reached at some point in time after the exposure.  This will give a good indicator of the calculated array temp.

    Fizix