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SK-TDA4VM: USB-C Power supply

Jasper Vanlerberghe
Prodigy 30 points
Part Number: SK-TDA4VM
Other Parts Discussed in Thread: TDA4VM,

Hi

I have ordered the PSU under the link: https://manhattanproducts.eu/products/manhattan-en-power-delivery-wall-charger-with-built-in-usb-c-cable-60-w-180245 for our TDA4VM. I compared the specs of the PSU with the ones suggested in Paragraph 2.1 of the TDA4VM user guide.

When I connect the PSU the red power led (LD3) does not come on and logically the unit does not boot. When I connect my phone charger the led comes on and the unit boots. My phone charger however is not up to spec, so I am afraid of brown outs. The Manhattan PSU conversely does work for charging my phone and other devices.

I am not sure what I missed selecting the power supply. Does the Manhattan PSU not fully adhere to the PD standard or does TI not fully implement the standard. Can someone help me in debugging what went wrong here. I want to avoid buying another 10 expensive PSUs that do not work.

Jasper

  • 0
    TI__Mastermind 49963 points

    Hi Jasper,

    As a disclaimer, I have not tested that particular PSU that was linked, but looking through the specs it looks compatible with the SK-TDA4VM. I have forwarded this question to our board designer to see if he sees anything wrong, but as he is out, his responses will be delayed to next week.

    In the meantime, I can send a link of a USB-C PSU that I have tested out on my end if you would like to order more:

    To set expectations, I have tested a few more PSU from (around 4) different brands that I got at a local electronics store ranging from 60W~110W PD, and so far they have all worked.

    Regards,

    Takuma

  • 0 in reply to Takuma Fujiwara
    TI__Guru 51465 points

    For the Manhattan PSU - I assume you are using the Type C connection, and not the Type A port with a Type C cable?  The specification states the Type C port is PD 3.0 capable, but the Type A port only supports 5V (2.4A) or 12W.  The TI design also supports PD version 3.0, so I don't see any issue with the supply working with the TI EVM.  It mentions safeguards for overload, overcurrent, and overheating protection.  I'm not sure how these protections are implemented in the design, so not sure if one of these are getting triggered by accident.  Very little is needed to turn on the power LED, so my guess is the supply is detecting some issue (safeguard) and shutting off.  If you have a volt-meter, you can probe TP56 and check the incoming voltage.