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DLPDLCR2000EVM: Use module without light engine

Rusha Chatterjee
Prodigy 135 points
Part Number: DLPDLCR2000EVM
Other Parts Discussed in Thread: DLPA1000, TIDA-01473

Hello,

I have two separate questions:

1. I would like to use the DLPDLCR2000EVM without the light engine. I know the DLP2607 is set up to not boot without the light engine installed. However the only connection between the light engine and the controller board is a single flex cable. Is is possible to modify the board/flex cable connector so that it doesn't need the light engine plugged in to boot? For example could I short a couple of the pins (based on your recommendation) on the connector for the flex cable so that the DLP2607 thinks the light engine is still installed?

2. Is is possible to get a custom DMD flex cable (the one that connects the DMD chip to the controller board) with a different length?

Thanks,

Rusha

  • 0
    TI__Intellectual 1825 points

    Hi Rusha, 

    Thank you very much for your post, please see my responses below. 

    1. The DLPDLCR2000EVM requires the DMD and LEDs to be connected for the system to operate properly. For the setup of the EVM, both the  DMD and LEDs are connected via the flex cable. The flex connector is expecting an actual load to be connected, so operation without the light engine is not possible. 

    2. As for the flex cable, TI cannot supply a custom flex cable. However, we have released the schematics for the EVM on TI.com which show the pinouts for the connectors. Using this information and the layout guidelines for the chipset, a custom flex cable can be designed. 

    Please let me know if you have any follow up questions!

    Thanks, 

    Brandon

  • 0 in reply to Brandon Seiser
    Prodigy 135 points

    Hi Brandon,

    Thanks for the quick response. Please see below:

    1. I want the DMD connected to the board with its flex cable. I only want to remove the LED and associated lens assembly. Could I put in a dummy load on the flex cable connector to make the DLP2607 think the LEDs is still connected?

    2. Thanks for the info on the flex cable, this helps.

    Best,

    Rusha

  • 0 in reply to Rusha Chatterjee
    TI__Intellectual 1825 points

    Hi Rusha, 

    No problem! I am happy to help. Please see my response below:

    1. A dummy load would be required. Because the DLPA1000 (the LED driver & PMIC for the DLPDLCR2000EVM) has a fault mode for overvoltage protection (section 7.3.5.5 of the DLPA1000 datasheet) a dummy load would be required. You would need to be able to mimic the LEDs, so I probably look into different diodes that could handle the voltage/current outputs of the circuit. 

    2. The schematics for the DLPDLCR2000EVM can be found under the reference design page for this product. If you search TIDA-01473 on ti.com, you can find the schematic on the first link.

    Please let me know if you have any follow up questions!

    Thanks, 

    Brandon

  • 0 in reply to Brandon Seiser
    Prodigy 135 points

    Thanks Brandon, this was helpful.

    Best,

    Rusha

  • 0 in reply to Rusha Chatterjee
    TI__Intellectual 1825 points

    Hi Rusha, 

    You are welcome! Please continue to post questions as you come across them!

    Thanks, 

    Brandon