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BQ51025EVM-649_ Wireless Charger Receiver

Meria Jacob
Intellectual 370 points
Other Parts Discussed in Thread: BQ51025EVM-649, BQ501210EVM-756, BQ51025

Hi,

We are planning to interface BQ51025EVM-649_ Wireless Charger Receiver with i.X7 SABRE Board. For the same we are planning to connect the J3 only. IS any other pins required?

Could you please brief any other connection is required? We are confused as there is no power supply to the fuel gauge. Please describe in detail how to test this EVM

We are planning to use the BQ501210EVM-756_Transmitter with this. Please describe the settings or power supply to be taken care in this BQ501210EVM-756_Transmitter while testing?

Please describe each step to power Up and ON these EVMs. (transmitter and receiver)

Regards,

Meria Jacob

  • 0
    TI__Genius 14890 points

    Meria,

    J3 (OUT) and J4 (GND) are required to supply power from the bq51025EVM-649.  If control of the bq51025 is desired, The SDA and SCL lines may be accessed through J2.  The default output of the bq51025EVM-649 is 7V.

    The bq501210EVM-756 can operate from 5V to 19V.  The Features section of the datasheet outlines the voltage levels that are suited for different output power levels.  12V to 19V will produce 10W at the output of the bq51025 system.

    As this is the wireless power forum, we cannot comnet on the i.X7 SABRE Board.

    Regards,

    Dick

  • 0 in reply to Dick Stacey
    Intellectual 370 points

    Hi,

    Thank you for the reply.

    Could you please describe on the connection of J3 and J4? These are the outputs and should be connected to our board right?

    Please explain more about the TS/CTRL pin. Is it required to control this pin? Do we need to place a mating connector to J5 and tape the signal to the microprocessor in our board.

    Kindly guide me in this regard.

    Regards,

    Meria Jacob 

  • 0 in reply to Meria Jacob
    TI__Genius 14890 points

    Meria,

    J3 is the output (effectively a DC supply) for the bq51025EVM-649.  J4 is the ground return for the supply.  J3 should be the input voltage to your system and J4 would be ground.

    TS/CTRL has two functions.  Details are covered in section 9.3.9 of the bq51025 datasheet.  TS is the temperature sense.  It needs a thermistor (details in the datasheet) or can be disabled with a 10k resistor to ground.  The CTRL function enables the power transfer to be terminated by pulling CTRL high or low (details in the datasheet).  There is a current source as part of the TS function that is enabled periodically to measure the voltage on the TS/CTRL pin.  That voltage determines the temperature measured by the system.  The 10k resistor tells the TS function that it is 25C.

    If you do not want to use that function, simply tie 10k to ground.

    Regards,

    Dick