TPS25750: what is support for detecting proprietary legacy chargers

Prodigy 90 points

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Part Number: TPS25750

In the TPS25750 Host Interface Technical Reference, Section 2.6 0x29 PORT_CONTROL Register, under ChargerDetectEnable is the option "Detect BC 1.2 and proprietary legacy chargers". Can we get some more detail on this?  Exactly what legacy charger?  If one of these is recognized, are the voltages on D+ and D- recorded somewhere?

I am designing a smart phone accessory that will use USB C as an external power path and in addition to US BC PD, I also need to support BR 1.2 and certain legacy "resistor-network" chargers.

1 Reply

  • Hello,

    I am checking with our device expert, who will be back in office next week. I will update you then. 

    Thanks,

    Emma