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DC/DC LED Developer's Kit: Quick Start GUI NOT so Quick or Easily!

Leo Bosch
Guru 23000 points

Other Parts Discussed in Thread: CONTROLSUITE

Dear TI employee,

 

The USB drive didn’t contain a version of ‘Lighting_DCDC.exe’ and not found on TI’s site but found in the controlSUITE folder.

The USB drive contains only the XDS100 Drivers, but not needed.

 

Running ‘Lighting_DCDC’ select COM:(12) and Connect results in: ‘Could Not Connect: Please check connections’.

Checking all jumpers, switches and connects … but no result.

Seems no pre-flashed code in F28035. Reflash ‘Lighting_DCDC-FlashImage_v1.0.out’ but how to do this, don’t have software for this? (Is there any software for this action?)

Install project in CCSv4 Debug with flash to Flash-memory, Run and it works (also without CCS).

CCSv4 (Version: 4.1.2.00027) is very sensitive. Many times it crashes, giving black screen, emptying Desktop or reboots Windows (Vista).

But Ok, so far the Lighting kit finally works.

 

The documentation promises the .NET source code for the GUI under controlSUIT/devolp…/~Source/ but nothing found.

Is this available on another way? This would be very helpful for us.

 

The capabilities of the Lighting kit is not very clear.

On the Product Information site you are specifying; 12-48V DC input to SEPIC DC/DC stage 50V DC output.

In the ‘DC/DC LED Lighting Quick Start Guide’; 12 to 36V DC input.

In the ‘DC/DC LED Lighting Developer’s Kit Hardware Reference Guide’; 12V DC or 15-36V DC input and output 9-42V.

All these are confusing, but are in a certain way correct.

The Sepic module on his own will handle an input voltage from 0 till 50VDC but while it is permanently connected to the DC-Power module [M1] the input voltage is limited by the input capacitors C1-3 rated 50V and the module PTN78000 Vi=32V (no absolute maximum specified in the documentation), so probably 36V input will be the maximum for all inputs on the board, and NOT as mend somewhere 42 or 48V.

The Sepic output voltage is limited by several components but at least by the capacitors C2 & C3 rated 63V. The absolute maximum output voltage is than 63(- safety) - input voltage. Using a 36VDC input voltage limits the output voltage to 27V (63-36V).

 

For the Sepic output power you have to go deeper into the different documentations.

On your site: ‘4 LED driver stages, each capable of drving two strings at 30 watts’ does this mains Sepic output power 4x2x30W = 240W?

D1 rated 8A so output current max 8A?

 

The LED specification’s are completely missing. Which LED’s are used? What are the maximum ratings?

 

Best regards,

Leo Bosch

  • 0
    TI__Guru 57255 points

    Leo,

    I apologize for the issues that you have run into with the board.  I will take your comments and use them to improve the documentation for the kit.  I've addressed most of your concerns below.

    It sounds like by now, you have gotten the kit to work, is this correct?


    The USB drive didn’t contain a version of ‘Lighting_DCDC.exe’ and not found on TI’s site but found in the controlSUITE folder.

    The USB drive contains only the XDS100 Drivers, but not needed.

    Running ‘Lighting_DCDC’ select COM:(12) and Connect results in: ‘Could Not Connect: Please check connections’.

    Checking all jumpers, switches and connects … but no result.

    Seems no pre-flashed code in F28035. Reflash ‘Lighting_DCDC-FlashImage_v1.0.out’ but how to do this, don’t have software for this? (Is there any software for this action?)

    - It seems that your USB drive was not programmed correctly and that the FlashImage was not flashed onto the F28035 controlCARD.  I have not seen other issues like this, so I am hoping that you are the only person who has seen these issues.  I will check to make sure of this though. 

     

    Install project in CCSv4 Debug with flash to Flash-memory, Run and it works (also without CCS).

    CCSv4 (Version: 4.1.2.00027) is very sensitive. Many times it crashes, giving black screen, emptying Desktop or reboots Windows (Vista).

    But Ok, so far the Lighting kit finally works.

    - TI will be releasing a new patch for CCS4 within the next week or so that should improve the user experience of CCS.


    The documentation promises the .NET source code for the GUI under controlSUIT/devolp…/~Source/ but nothing found.

    Is this available on another way? This would be very helpful for us.

    - This will be put in the next release of the Lighting_DCDC kit software.  For convenience, I have put a copy of this here.

     

    The capabilities of the Lighting kit is not very clear.

    - Unfortunately, you are correct.  The "DC/DC LED Lighting Developer's Kit HW Reference Guide" has the final say in the board's specifications and is correct.  However, as you mention, the output voltage specification is not always 42V (which is for 12V input), but varies with input voltage.  I'll fix this in the future revision.

     

    For the Sepic output power you have to go deeper into the different documentations.

    On your site: ‘4 LED driver stages, each capable of drving two strings at 30 watts’ does this mains Sepic output power 4x2x30W = 240W?

    D1 rated 8A so output current max 8A?

    - For SEPIC output I would specify 100W because this is the maximum I've pushed it to.  Theoretically, 150W at 3A should be possible. Keep in mind that the LEDs that come with the kit are not mounted on a metal core PCB and do not have heatsinks.  As such, they should not be pushed much above a total LED power of 25W.

     

    The LED specification’s are completely missing. Which LED’s are used? What are the maximum ratings?

    - LEDs used are OSRAM Golden Dragons.  Part number is LCW W5SM-JXJZ-4L8N-Z. I'll mention this in the HWGuide.

     


    Thanks,
    Brett

  • 0 in reply to Brett Larimore
    TI__Guru** 119680 points

    CCS4.1.3 will be pushed as a service release in the next 1-2 weeks, but you can also download immediately from the Wiki

    http://processors.wiki.ti.com/index.php/Download_CCS

     

  • 0 in reply to Brett Larimore
    Guru 23000 points

    Hallo Brett,

     

    Thanks for your quick reply.

    Yes, the kit works.

    Build the .NET source (with some unimportant warnings) and it works too.

    As I understand well the Sepic is theoretically designed for 150W 3A.

    Thanks for the LED power warning, but this is where we purchased the kit for, to design a temperature (and more) controlled Sepic LED driver.

     

    Thanks, Leo.

  • 0 in reply to Leo Bosch
    Guru 23000 points

    Also Chris thanks, it will reduce my stress.

  • 0 in reply to ChrisClearman
    Prodigy 10 points

    For other that had an issue getting the GUI to work, my ControlCard also came unprogrammed. Got it to work initially through SCI boot, then found this thread and flashed the controlcard using CCS as described by Leo.

  • 0 in reply to Marc Humphreys
    TI__Guru 57255 points

    Marc,

    As you've found out, there were some controlCARDs that did not get programmed in the first weeks of the release.  More information on the fixes made can be found:
    http://e2e.ti.com/support/microcontrollers/tms320c2000_32-bit_real-time_mcus/f/172/t/57174.aspx


    Thank you,
    Brett