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TPS25750: I am looking for a USB C PD SINK chip. TPS25750

shin chol choi
Intellectual 370 points
Part Number: TPS25750
Other Parts Discussed in Thread: TPS25730EVM, TPS25730

Tool/software:

I am looking for a USB C PD SINK chip.

The purpose is to use it as a power supply for an audio amplifier.

There is no battery. Also, it is a priority to receive the maximum voltage from the PD SOURCE.

It would be nice if the program is as simple or absent as possible.

It would be nice if it can receive up to 100W of maximum power.

It would be nice if the circuit is simple.

Can this part TPS25750 be a good solution?

  • 0
    TI__Mastermind 31152 points

    Hi Shin, 

    Thank you for reaching out!

    The TPS25730 would be a great fit for your application. It is a sink-only PD controller (up to 100W) best suited for barrel-jack replacement type applications. It is fully configurable with pin strapping and does not require further firmware development. I suggest getting started with the TPS25730EVM. 

    Best Regards, 

    Aya Khedr

  • 0 in reply to Aya Khedr
    Intellectual 370 points

    Hi. I am designing a board with your suggestion TPS25730EVM. I want to know something. Question 1:There are many types of USB PD adapters with different maximum outputs. If the output of TPS25730 is set to 100W, can I get 20W output when a 20W adapter is connected? Can I get 45W output when a 45W adapter is connected? Question 2: When the adapter is connected, can I read the voltage and current values ​​of the adapter using i2c?Question 3: The output voltage of TPS25730 is between 5V and 20V. Please recommend a DC-DC converter that can be used next. I will use about 4.5V/300mA.

  • 0 in reply to shin chol choi
    TI__Mastermind 31152 points

    Hi Shin, 

    1- The minimum power required is determined by the Operating Current configuration multiplied by the Minimum Voltage configuration. When the received PD source capabilities power do not meet the minimum power, the Capability Mismatch bit is set in the PD Request message. 

    2- Yes, the host can utilize the "GSrC" PD Get Source Capabiliies 4CC command to issue a Get_Source_Cap message to the port partner. See details in the TPS25730 TRM. 

    3- I mainly support USB Type-C PD controllers. For DC-DC, I recommend submitting a new E2E thread with a DCDC part number.

    Best Regards, 

    Aya Khedr 

  • 0 in reply to Aya Khedr
    Intellectual 370 points

    Hi, Aya Khed. I want to do a simple TPS25730 setup. I want to set it so that it will use the full power of the adapter no matter what USB PD adapter is connected. Can you tell me how to set it up in hardware or software?

  • 0 in reply to shin chol choi
    TI__Genius 13275 points

    Hi,

    We have received your message. TI US is closed for the Thanksgiving holiday until Monday 12/02. Please expect delayed responses.

  • 0 in reply to shin chol choi
    TI__Mastermind 31152 points

    Hi Shin, 

    The voltage/current levels are set using resistor pin strapping on the ADCINx pins of the TPS25730. The device behavior is determined in several ways depending upon the decoded value of the ADCINx pins. See Table8-1 in the datasheet for the decoding of the pins. 

    The maximum supported power on the TPS25730 is 100W (20V/5A). In your case, you may want to consider setting the minimum voltage to 5V and the maximum voltage to 20V (see highlighted below). The current configuration will depend on your application. The operating current is defined as the current required for the sink to be functional. The maximum current is defined as the maximum current the sink may use (set to 5A in your case). 

    Best Regards, 

    Aya Khedr