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Flex cable length over the limit

Uryyy
Expert 1770 points
Other Parts Discussed in Thread: DLP4500

Hello everyone,

I can confirm flex length's restriction as 63mm-73mm in DLP350&DLP4500(DLP 0.45 WXGA) Data Manual.

I'd like to extend length by +40mm(max113mm).

What problems can the over limitation cause?

Could you succeed DLP 0.45 WGA work by using flex cable over 113mm? 

e.g.) not satisfy DMD's control response and others... 

Thank you,

Uryyy

  • 0
    TI__Expert 4720 points

    Hello Uryy,

    There are a multiple problems that could occur when extending the flex cable length: signal attenuation/integrity, cross-talk between channels, phase mismatches, reflected signals, etc. The interface between the DMD and controller is a high-speed one and so there are inherent difficulties in routing longer paths.

    That's not to say that it isn't possible to extend the length, but TI has not tested or modeled longer lengths. If you are interested in extending the length of the cable, you'll need to do your own modelling to verify proper operation. Assuming you can design a connection that meets the voltage and timing requirements and also does not suffer from reflectance issues for both the DMD and controller you should be able to extend the distance between the components. 

    If you don't feel comfortable designing a high speed interface, you should consider contacting one or more of our design houses for their services. You can view our design houses on our "Solutions and Services" page: http://www.ti.com/lsds/ti/dlp/advanced-light-control/solutions-services.page.

    Best regards,

    Blair