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TPS65988: Configuration using TPS65988

Kaji@PAN
Mastermind 7815 points
Part Number: TPS65988
Other Parts Discussed in Thread: BQ25611D, , BQ25703A

Hi,

I am considering the composition of the attached excel.
(question 1)
Regarding the configuration of ①, we are thinking of controlling the charging current according to the DCP, CDP, and SDP that can be discriminated by the charging IC.
The MCU can communicate via USB via the charging IC.
The charging IC can communicate with the MCU via I2C.
I think that the BQ25611D can distinguish SDP etc., but the MCU cannot do USB communication.
Is there a charging IC that can be used like ①?
(Question 2)
In the configuration of ②, the USB control IC can distinguish DCP, CDP, and SDP, and can notify the MCU.
The MCU can communicate via USB via the USB control IC.
The charging IC can change the charging current from the MCU by I2C control.
In this configuration, we are considering the TPS65988/87D as a USB control IC.
It seems that BQ25703A can be used as the charging IC, but is there any other charging IC that can be used?
I would be grateful if you could introduce me to an inexpensive charging IC.

Best regards,

Constitution.xlsx

  • 0
    TI__Mastermind 41335 points

    Hello,

    For your first question can you please clarify your setup? The chargers utilize D+/D- detection on the adapters, but the microcontroller should not connect to the D+/D- lines. I would recommend looking at host-controlled battery chargers that utilize D+/D- detection from an adapter in order to achieve diagram (1). Just note that the D+/D- does not come from the host.

    What specific features are you looking for in a charger?

    For example:

    1. How many cells?

    2. What charging current?

    3.What input current limit?

    4. Internal/external FETs?

    5.Included power path, etc?

    If the charger has D+/D- detection you do not need an additional IC to arbitrate this. 

    Thanks,

    Mike Emanuel