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DLPC3439: DLPC3439

JACK LI
Prodigy 30 points
Part Number: DLPC3439
Other Parts Discussed in Thread: DLPA3005, , DLP4710, DLP4710EVM-LC, DLPC3438

Hi TI expert，

   I encountered a problem with using firmware about FWSel_DLPC3439_DLPA3005_SeriesLED_pm2_i2c0x36_v7p7p1.img.I have a set of hardware that is working normally with firmware (FWSel_DLPC3439_DLPA3005_pm1_i2c0x36_v7p7p1.img),Now I want to use two LEDs  to increase brightness，So I updated the firmware to  FWSel_DLPC3439_DLPA3005_SeriesLED_pm2_i2c0x36_v7p7p1.img，replace a single LED with two LEDs connected in series,But the system is not working properly。Do these two firmware have any different requirements for the hardware system?

   Thanks!

  • 0
    TI__Genius 9580 points

    Hello Jack Li,

    Welcome back to the e2e forums and we hope to assist you with your questions. 

    So the difference between the two firmware image files you have mentioned is the first one is using "pm1" in the name which is pin mapping 1. The second firmware image you mentioned is using "pm2" in the name which is pin mapping 2.

    You can see that the pin mapping routing options 1 and 2 are shown here from the dlpc3439 datasheet in how to connect to the DLP4710 DMD.

    If your hardware is wired and configured and seems to work with the firmware for pin mapping 1, then you should continue to use pin mapping 1 firmware instead of pin mapping 2 firmware.

    Ensure you click the right pin mapping option in the firmware selector tool as well as click all other correct settings for your application.

    Regards,

    Alex Chan

  • 0 in reply to Alexander Chan
    Prodigy 30 points

    hi:

        Sorry,I made a mistake in writing the firmware name yesterday，The firmware I am using now is FWSel_DLPC3439_DLPA3005_SeriesLED_pm1_i2c0x36_v7p7p1.img.My question：FWSel_DLPC3439_DLPA3005_SeriesLED_pm1_i2c0x36_v7p7p1.img and FWSel_DLPC3439_DLPA3005_pm1_i2c0x36_v7p7p1.img,What are the different hardware requirements between these two firmware？

       Thanks

  • 0 in reply to JACK LI
    TI__Genius 9580 points

    Hi Jack,

    No problem, thanks for the clarification on firmware.

    Here are a few questions I have to further debug the issue.

    • Are you using a DLP4710EVM-LC and made hardware modifications to add series LEDs or are you using your own custom board?
    • What LEDs are you using and what LEDs did you add in series?
    • When you say your system is now not working what do you mean or do you have more details? Can you power on and connect to the system through your computer? Do you see no light output? In the EVM user guide there are status LEDs do you see these turning on? https://www.ti.com/lit/pdf/dlpu079

    The new seriesLED firmware should add the following by setting the loop bandwidth to BC1 and BC2.

    I also saw this in the datasheet of the dlpa3005 datasheet that may be a hardware change.

    Regards,

    Alex Chan

  • 0 in reply to Alexander Chan
    Prodigy 30 points

    Hi Alex Chan：

        Thanks for your reply。The current state of hardware is:

         .I am using my  own custom board(dlpc3438+dlpa3005+dlp4710).

         .The led is  LE B P1MQ().

         .power on,   no  light output.,after 

        .resetz rise,after 40ms,fall.

          use FWSel_DLPC3439_DLPA3005_pm1_i2c0x36_v7p7p1.img  and signal led ,The system is functioning normally。

         I would like to know the hardware requirements for using this firmware（FWSel_DLPC3439_DLPA3005_SeriesLED_pm1_i2c0x36_v7p7p1.img）

        What aspects should I check？

          Thanks.

           

         .

         .

  • 0 in reply to JACK LI
    TI__Genius 12785 points

    Hello Jack,

    From your last message it appears that your system is running well now. Please correct me if I am mistaken.

    Alex has highlighted the hardware differences between the firmware versions above. Do you have other questions regarding hardware? What specifically are you uncertain about?

    Regards,

    Austin

  • 0 in reply to Austin Snyder
    Prodigy 30 points

    Hi:

         use FWSel_DLPC3439_DLPA3005_pm1_i2c0x36_v7p7p1.img  and signal led ,The system is system is running well .Now I want to use two LEDs  to increase brightness，So I updated the firmware to the FWSel_DLPC3439_DLPA3005_SeriesLED_pm1_i2c0x36_v7p7p1.img，replace a single LED with two LEDs connected in series,But the system is not working properly。I would like to know the hardware requirements for using this firmware（FWSel_DLPC3439_DLPA3005_SeriesLED_pm1_i2c0x36_v7p7p1.img）

        What aspects should I check？

       Thands

  • 0 in reply to JACK LI
    TI__Genius 11565 points

    Hello Jack,

    You mentioned your custom board is using (dlpc3438+dlpa3005+dlp4710), is this a typo for DLPC3438? If you are using DLPC3438, then it will not work with the FWSel_DLPC3439_DLPA3005_SeriesLED_pm1_i2c0x36_v7p7p1.img. 

    If you are using DLPC3439 and have series LEDs in your hardware design, then you will need to select and calculate the proper Rlim (that Alex mentioned above), inductor Lout and capacitor Cout of the buck converter for your design. Please refer to the DLPA3005 datasheet section 8.2.2 for details. 

    Regards,

    Lori 

  • 0 in reply to Lori Wang
    Prodigy 30 points

    Hello:

        You are right，My custom board is using (dlpc3439+dlpa3005+dlp4710).the DLPA3005 datasheet section 8.2.2   suggested the corresponding parameters, but in reality, TI did not follow  the suggestions for designing the DEMO board, vout of the DEMO board(TIDA-01126 )  is 3v . but using 1.5uL,What I need to know is which hardware the  firmware（ FWSel_DLPC3439_DLPA3005_SeriesLED_pm1_i2c0x36_v7p7p1.img） is compatible with？ what resources it requires？ can ti provide me with a corresponding reference circuit? Or tell me which reference circuit was designed based on，Because firmware is not open , I don't know how to adapt it？

      Thanks.

  • 0 in reply to JACK LI
    TI__Genius 11565 points

    Hello Jack,

    I'm discussing with our team to check if we have further information about DLPA3005 series LEDs design that we can share. 

    I'll get back to you in a few days.

    Regards,

    Lori 

  • 0 in reply to Lori Wang
    Prodigy 30 points

    HI:

      Thanks，Looking forward to your reply very much。

      Jack

  • 0 in reply to JACK LI
    TI__Genius 12785 points

    Hi Jack,

    We appreciate your patience.

    Regards,
    Austin

  • 0 in reply to Austin Snyder
    TI__Genius 11565 points

    Hi Jack,

    I've attached a DLPA3005 Series LEDs guide for you. In the guide, it has DLPA3005 Series use cases, capabilities, and an example for max output current at 16A. 

    I hope this helps.

    Regards,

    Lori 

     DLPA3005 Series LEDs Guide_customer_version.pdf