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Subject: Inquiry Regarding HDMI Isolation Chip for Power over Ethernet (PoE) to Non-PoE Device Integration

sakthi vel
Prodigy 160 points
Hello there,
 
I am reaching out to inquire about the availability and specifications of HDMI isolation chips designed for use in Power over Ethernet (PoE) environments.
Our current project involves a device powered by PoE, equipped with HDMI connectivity. To maintain signal integrity and isolate potential power-related issues, we are actively seeking a reliable HDMI isolation chip that can facilitate a secure connection between our PoE-powered device and a non-PoE device.
 
Here are the specific requirements we are looking for:
 
Compatibility:
The HDMI isolation chip should be compatible with devices powered by PoE, ensuring a seamless integration with our existing PoE infrastructure.
 
Isolation Features:
Robust isolation capabilities to protect both the HDMI signals and the connected non-PoE device from potential electrical interference.
 
Technical Specifications:
Support for high-definition video and audio transmission to meet the demands of our application any additional technical specifications that highlight the chip's performance and capabilities.
 
Documentation and Support:
Technical documentation, including datasheets and integration guides, to aid in the seamless implementation of the HDMI isolation chip. 

Lead Time and Delivery: The expected lead time for delivering the HDMI isolation chips.
 
If you require any additional information from our end or if there are specific channels for submitting a formal request, please do not hesitate to inform us.
 
Thank you for considering our inquiry.
Best Regards,
Sakthivel B
  • 0
    TI__Guru 54535 points

    Hi Sakthivel,

    Thank you for reaching out.

    Unfortunately, we currently do not have any isolation devices that isolate HDMI interface. Let me know if you have any other isolation requirements, thanks.


    Regards,
    Koteshwar Rao

  • 0 in reply to Koteshwar Rao
    Prodigy 160 points

    Hi Koteshwar, 

    Can you confirm that isolation is compulsorily required? for our system?

    Our concern is to connect an external HDMI monitor with our system, which is powered by POE. We are thinking that if the two grounds (POE ground and external DC ground) are mixed, then a small potential difference may create and a current will flow in that may cause damage to the HDMI monitor or other devices connected to our carrier board. Could you please check and confirm if our understanding is correct or if it will not happen like the way we are assuming?

    Does connecting externally powered devices (ie, HDMI monitor , Micro B USB, GPIO's in GPIO headers ) with POE powered device is advisable without isolation?

    Our system required 20 Watts of power and we are about to use AT standard POE injector, 

    Thanks,
    Sakthivel

  • +1 in reply to sakthi vel
    TI__Guru 54535 points

    Hi Sakthivel,

    Thank for sharing additional inputs and asking follow-up question.
    Your understanding is correct, noise from the Ethernet port could propagate to HDMI interface and could possibly affect data. My understanding is that Ethernet data is already isolated through magnetics on the Ethernet connector, hence, the data doesn't require isolation. While POE is not isolated, maybe if you could isolate the power from Ethernet and then connect it to SOC or HDMI interface, then I believe the noise from Ethernet will stay isolated.

    Isolation can be used for multiple purposes - high voltage protection, ground isolation, high-side driving and EMC protection. Right now, it seemed like you are question is in relation to ground isolation. If any of the other aspects are important for you, please you can consider using isolators with higher isolation ratings than the magnetics in Ethernet connector. Thanks.


    Regards,
    Koteshwar Rao

  • 0 in reply to Koteshwar Rao
    Prodigy 160 points

    Hi Koteshwar,

    Thanks for your support,

    Sakthivel,