• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 28 subscribers
  • Views 407 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DLP2010EVM-LC: RGB Led Max Current

Tony Higgens
Intellectual 340 points

Part Number: DLP2010EVM-LC

Hi, 

I see RGB Led Max Current has a maximum possible setting of 1023. 

However, the the Firmware for the DLP 2010 EVM LC ships with RGB Led Max Current set to a very conservative 302. 

Is the design safe to run at RGB 1023 without further consideration (subject to the principle that higher current reduces LED lifetime) or is there a risk to fast burnout? 

Perhaps it is only safe to take one Led that high and then use monochrome?

Are there any guidelines as to what is safe please? 

Regards,

Anthony 

  • 0
    TI__Intellectual 1825 points

    Hi Anthony, 

    Thank you very much for your post and interest in the DLP2010EVM-LC!

    The max current setting of 1023 is the largest value the DLPA2005's current register can accept. This PMIC is designed to support many different LEDs. For the LEDs in the DLP2010EVM-LC, the maximum current the LEDs can be driven at is generated by the DLPA2005 + driver circuit when the value is set to 302. 

    So in summary, the 302 value is setting the LEDs to run at maximum current. Even if you desire the system to run with on one color, the value of the LED current cannot go above 302. 

    Also, the EVM is not safe to run at 1023. If you try to run the EVM at 1023, the driver circuitry and LEDs will become damaged. 

    The safe current setting is listed in the EVM user's guide. The highest current supported for this system is 650mA. Please note the the DLPA2005 register setting is not equivalent to the LED current. The value is simply written into the DLPA2005, which then converts this 10-bit value to an LED current setting.

    One way you can verify if the LEDs are running at 650mA (max current supported) is to use the DLP2010LC GUI and check the current on the "IntelliBright" page via the "Display" tab.

    Please let me know if you have any other questions!

    Thanks, 

    Brandon