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PCB Without RGB Leds

Other Parts Discussed in Thread: DLPA3005, DLP4710, DLPC3439

Hello all, 

Can you please tell us wich parts we wouldn't need if we don't want to use RGB Leds?

If we leave the controller DLPA3005 aside  (for example) will the other DLP chips still work flawlessly? Is there some kind of communication / protocol between this part and the other parts? 

Can TI provide us a list of components that are not needed for this variant? 

Many thanks in advance, 

  • Hello User,

    Thank you for your interest in our DLP Technology.

    Please note that we only support valid chipset combinations which would be in your case the DLPC3439, DLP4710 and DLPA3005.

    Removing the DLPA3005 would not be possible since the device is also supplying the DMD voltages. It also ensures proper power-up and down timings.

    Best regards,

    Nadine
  • Hello Nadine, 

    Thank you for your reply. Can you please provide us further assistance? 

    We are interested on this set-up and on the DLP Technology. We are just not interested on the RGB Leds, we would like to use our own Leds. Is it possible that you provide us a list of components  that we could leave aside if we used your layout? 

    Thank you for your time, 

  • Hello User,

    I am more than happy to help to identify which components are not needed on your new layout.

    Can you please provide more information regarding your features do you want to support ? Would you like to be able to connect HDMI ? Would you like to interface via USB and the Cypress chip to the DLPC3439 controller ?

    Are you planning on using a different front-end solution ?

    Thank you,

    Nadine
  • Hello Nadine,

    Thank you for your email.

    We would like to use the evaluation board assembled on this Kit, just not the RGB Leds.
    Basically we want to send an image through HDMI to the PCB and then use the DLP technology from TI to project it. We have our own light source therefore any chips / components that are controlling/driving the RGB leds are not necessary.
    From Inputs we need : HDMI, USB (programming / communication) , Programming interface (black Molex connector) , Power
    Outputs : Image projection (without light source!).

    We have to make an order soon therefore it is important for us to know if we can reduce the total costs.

    Thank you for your help and assistance,
    Best Regards,
    Carlos
  • Hello Carlos,

    You basically have to keep everything. We currently don't support an external LED driver solution.

    As I mentioned earlier the DLPA3005 is supplying the DMD voltages and ensure proper power up and down timings. This means you would still need the DLPA3005 even if you are not driving the LEDs with it which is currently not supported by our firmware.

    Can you not use the DLPA3005 to drive your light source ?

    Best regards,

    Nadine
  • Hello Nadine, 

    Thank you for your quick reply and information. 

    But if we are not driving the Leds, there must be some parts that we definitely do not need to assemble, I am thinking for example in the 3 white JST connectors, the big coil from Coilcraft and its fan for example, among others. 

    Can you provide us this information? 

    No, unfortunately I cannot use the DLPA3005 to drive my light source...

    Best Regards,

    Carlos  

  • Hello Carlos,


    Unfortunately our firmware is not supporting using the DLPA3005 without the illumination block. Removing the parts and don't have a load connected will cause issues or will damage the part.

    Best regards,


    Nadine

  • Hello Nadine, 

    Ok, thank you for this important information. Can you tell us what us the difference between the DLPA3005C and DLPA3005D? Can we use the DLPA3005D on this board without any problem? Will everything work just like with the DLP3005C? I just saw today that the DLPA3005C is listed as "LIFEBUY"...

    Thank you for your time,

    Best regards, 

    Carlos 

  • Hello Carlos,

    The main difference between DLPA3005C and DLPA3005D is the input voltage range. We also moved to radiometric VLED_OVP which includes register changes in the DLPA3005 device.

    Older firmware does not support the register changes when moving from C to D revision. Newer firmware is supporting both versions >1.5.x versions.

    DLPA3005C will not be available in the future anymore.

    Best regards,

    Nadine
  • Hello Nadine,

    is it possible to use a load resistor instead of the LEDs? Like Carlos, we dont want to use the them, but still we need to avoid the DLPA3005 to exceed the POWERGOOD window.

    Best Regards,

    Joey
  • Joey,

    The normal use case we can support for the DLPA3005 is to drive LED's.

    If you would like to do your own testing and development with a load resistor you can do that but we can not provide any additional support.

    Thanks,

    Nadine