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TIDA-00554: NIR Scan nano EVM Modification HW + FW for 560mA Total Lamp Current

Part Number: TIDA-00554
Other Parts Discussed in Thread: DLPA2005

Dear Sir,


For  NIR Scan Nano EVM in our Application Development,  we require Lamp intensity Increase to 2 Times of the present Lamp Intensity
1) EVM Uses ILT 1088-1 Two Numbers Lamp which are rated for 140 mA Each Lamp total lamp current works out to 280 mA

2) For Our increased Lamp current , we are planning to use ILT 1088-2 - Two numbers each lamp rated for 280 mA Each Totaling to 560 mA.

3) We have Re configured HW suitably by Modifying R 517, R 518, R 519 in DLPC 150 Board for 560 mA Constant Current and Limit Current accordingly. ( HW with 560 mA Dummy Load works fine)

4) Please inform if we need to change FW Settings to accommodate the above increased intensity in Power Management section of FW , if so please let us know which places are all to be changed in FW our 560 mA Lamp intensity.

5) Presently We have Enabled Macro as FOUR Lamps in common.h header file instead of original TWO Lamps

6) With the above setting Total Lamps for 560 mA is working only for a single scan and lamp switches off automatically after scan preventing Multiple scans..

7) We feel some more settings also to be enabled to have repeated scan for 4 Lamp mode ( Each lamp 140 mA) for Total lamp current 560 mA

8) Please advise How many different Macros to be enabled in  FW for our  560 mA Lamp intensity for multiple scans required.

Thanks

V.Tholkapiyan

  • V. Tholkapiyan,

    Welcome to the E2E forums and thanks for your interest in our DLP technology.

    The DLPA2005 (the power management IC driving this system) can output up to 2.4 A so you should be OK with regards to current output. Can you share what component values you used for modifying your system?

    Regards,

    Philippe Dollo

  • Dear Sir,

    Constant Current & Current Limit Setting Changed for Following Components in DLPC 150 Boards

    HW Changes :

    R517 - 12K ±1%

    R518 - 14K±0.1%

    R519 - 15K±0.1%

    FW Changes

    FOUR_LAMPS Macro Enabled in common.h Header File

    Please advise any changes required in FW

    Thanks & Regards

    V.Tholkapiyan.

  • V.Tholkapiyan,

    Our team is considering your question. We are fairly limited on resources at the moment, but please expect a reply by the end of next week.

    Regards,

    Austin

  • V.Tholkapiyan,

    We believe the method you have described above for implementing your new illuminator configuration is correct. If you are encountering shutdown issues you may want to try using a battery to supplement the necessary power. The USB supply alone may be entering an under-voltage shutdown situation, so the battery should help mitigate the issue.

    I hope this helps.

    Best Regards,

    Philippe Dollo