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TI MaxCharge and Quick charger(QC2.0) are compatible?

Mason Noh
Expert 2490 points
Other Parts Discussed in Thread: BQ25895, BQ25890, BQ25898D

Hello

I have questions related to BQ25895 (MaxCharge).

BQ25895 can detect Qulcomm Quick charge adapter(T/A)??

I don't think so because it's different threshold voltage on data line MaxCharge and Quick charge.

But I've found test result using Quick charger(QC2.0) and battery charger(BQ25895) in web site.

http://ele-tech.com/html/the-purple-rice-of-millet-serves-as-and-moves-power-to-disassemble-and-assess-and-test-quickly-how-is-sincerity-of-99-yuan.html

Is it possible??? How can BQ25895 detects Quick charge adapter?

  • 0
    TI__Guru**** 165886 points

    To achieve fast charging, high voltage (9V/12V) adapter with USB compatibility (5V) is required. TI refers such adapters as HVDCP (High Voltage Dedicated Charging Port) in general. Several companies have proprietary handshake to achieve this goal. However these handshakes are not industry standard, hence

    TI does not claim compatibility. QC2.0/3.0 is one that uses D+/D- handshake, while Mediatek PumpExpress is another one. These adapters all have an interface chip such as CHY100 (Power Integration) and iW62x (iWatt) included inside to handle the protocol. From market perspective, a lot of system vendors support this type of adapters with their own naming such as Adaptive Fast Charge (Samsung), Turbo Charge (Motorola), Boost Master (Asus). With so many different naming, there is not a standard for us to claim compatibility. TI has tested and confirmed bq2589x can support HVDCP with these interface chips that includes Mediatek PumpExpress or QC2.0 support.

  • 0 in reply to Jeff F
    Expert 2490 points
    Thank you for your reply.
    Have you ever tested bq2589x can support QC3.0 either?
  • 0 in reply to Mason Noh
    TI__Guru**** 165886 points

    The bq25890/5 cannot support QC3.0.  The bq25898D's D+/D- pins have the functionality to work with QC 3.0 if the host software is written to correctly them.