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TPS65987D: BC1.2 Auto Mode Advertisement

Keith Keller
Expert 7230 points
Part Number: TPS65987D
Other Parts Discussed in Thread: TPS2514, TPS25810

Hello,

We're considering using the TPS65987D in a USB-C application:

It seems that there is BC1.2 support of this device have an “auto mode advertisement” which can be used to support higher charging current (up to 2.4A) for some “popular devices in the market” according to the datasheet.

  1. Could you please provide a list of devices that this chip can support under BC1.2? (especially with higher charging current?)
  2. Does this list include BC1.2 and other "propriety charging algorithm"?

It's likely we'll need to design both a USB-C charger with no PD and a USB-C PD charger. If we use this device for our PD solution, what port controller you would recommend for our USB-C charger that can support the same devices with same charging current? (We want the same experience between the 2 different chargers.) 

3.Would the TPS25810 and TPS2514 shown in section 8.2.2 in TPS25810 datasheet provide the same user experience?

Thank you very much, Keith

  • 0
    TI__Mastermind 30000 points

    Hi Keith,

    The TPS65987D is able to support BC1.2 compliant charging schemes such as CDP and DCP, as well as non-compliant charging schemes such as Divider 3 and 1.2V mode. The below link is a good reference between the different charging schemes.

    https://obddiag.net/usb-power.html

    For your other design of a Type-C charger (no data), the TPS25810 and TPS2514 is the solution you should go with. The TPS25810 will handle Rp advertisement on the CC lines, as well as control your 5V power path while the TPS2514 will control legacy advertisement on the DP/DM lines