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TPS25740: Could TPS25740 support up to 100W/ 20V@5A power application ?

Rocson He
Intellectual 1830 points
Part Number: TPS25740

Hi Team,

Could TPS25740 support up to 100W, 20V /5A output ?

And is there any Automotive Q1 grade plan for this part ?

Thanks.

  • 0
    TI__Guru 50120 points

    HI Rocson,

    Yes the TPS25740 is capable of 100W 20V/5A output. The TPS25740's voltage advertisment are as follows: 5V,12V,and 20V all at either 3A or 5A.

    If you are interested in a superset of this, please take a look at the TPS25740B as it does the same the TPS25740 but it also includes the 15 voltage advertisment option.

    As it is, there are no plans to have an automotive qualified (Q1) version of the part.

    Regards,

    Jimmy Hua

  • 0 in reply to Jimmy Hua
    TI__Intellectual 1920 points
    Hi Rocson,

    Be sure to use a captive cable able to support 5 A. The TPS25740 does not communicate with the cable to determine its capabilities.

    Regards,
    Donovan
  • 0 in reply to Jimmy Hua
    TI__Intellectual 1830 points

    Hi Jimmy,

    Thanks for your reply.

    For TPS25740B-Q1 auto grade device, what's the RTM schedule ?

    And is it P2P with the current TPS25740 commercial grade version part ?

    Thanks.

  • 0 in reply to Donovan Porter
    TI__Intellectual 1830 points
    Hi Donovan,

    My customer application would be for Car charger for automotive. It seems it would not be practical to have one fixed attached cable, as some PC adapter does.
    So for the attached cable application, as TPS25740 doesn't communicate with the cable, it means the end user could only plug the USB-C device to the attached cable, while, not being able to use their own USB-C cable, correct ?
    And this case happens only for 100W/ 5A application, while for 60W max, TPS25740 could use the independent USB-C cable, right ?
    Thanks.
  • 0 in reply to Rocson He
    TI__Intellectual 1920 points
    Hi Rocson,

    1. "So for the attached cable application, as TPS25740 doesn't communicate with the cable, it means the end user could only plug the USB-C device to the attached cable, while, not being able to use their own USB-C cable, correct?" Only if the device attached is 100 W. If the device is 60 W (20V, 3A) then there should be no issue with the end user using their own cable because a standard USB-C cable can handle 3 A.

    2. "And this case happens only for 100W/ 5A application, while for 60W max, TPS25740 could use the independent USB-C cable, right?" Yes. A 5A capable cable is only needed if over 60 W are required for the device.

    In the end it depends on what device the end user is trying to power. For phones, tablets, and most other portable devices, over 60 W shouldn't be necessary and therefore it would be better to limit the TPS25740 to 60 W. If 5 A is needed to do over 60 W, then the proper 5 A cable is required to safely power the connected device.

    Regards,
    Donovan
  • 0 in reply to Donovan Porter
    TI__Intellectual 1830 points

    Hi Donovan,

    Thanks for your explanation.

    So for TPS25740, it should also work to output 100W, when one 5A qualified cable  with E-mark is used ? Or as you mentioned before, TPS25740 would not talk to cable, so when one 5A cable with E-mark is attached, it would not output 100W ?

    Also, Do you know the TPS25740B -Q1 automotive version device RTM schedule ?

    Thanks for your help.

  • 0 in reply to Rocson He
    TI__Intellectual 1920 points
    Hi Rocson,

    The TPS25740 will provide 100W regardless of what cable is used (if configured for 100W and 100W is negotiated with a device). This is dangerous because the TPS25740 does not communicate with the cable so it does not know if it is 5A capable or not. Therefore, if a non 5A cable is connected, then 5A will be provided and damage the cable.

    An automotive version of the TPS25740B is being looked into but there is currently no definite RTM schedule. Hope this helps.

    Regards,
    Donovan
  • 0 in reply to Rocson He
    TI__Guru 50120 points
    Hi Rocson,

    As Donovan pointed out, there has been some talk on the matter of getting the TPS25740B automotive qualified. However, it is still at it's infancy stage with no definite timeline.

    The TPS25740B is P2P with the TPS25740. Both devices are 24 pin with the TPS25740B having a CTL3 pin instead of a EN12Vb / EN9Vb pin.

    Regards,
    Jimmy Hua