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ISO7241 Vcc2 current

Kevin Godfrey
Prodigy 90 points
Other Parts Discussed in Thread: SN6501, TPS55010

Good day

I am interested in using the ISO7241 in an isolated application.Can you please confirm how much current can be sourced from the Vcc2 pin for powering some external components?

Thank you!

  • 0
    TI__Intellectual 1815 points

    Hi Kevin,

    ISO7241 is a 4 channel digital isolator. Both VCC1 and VCC2 have to be provided externally. Are you interested to know how much current the Vcc2 pin draws? If yes, it will need a maximum of 28mA during 25Mbps of operation.

    Regards,

    Sarangan

  • 0 in reply to SaranganValavan
    TI__Mastermind 21326 points

    Hi Kevin,

    If you are looking to create an isolated power supply for the second side of the IC, I would recommend looking into the SN6501 or the TPS55010.

    Please let us know if you have any questions.

    John

  • 0
    TI__Mastermind 28265 points

    Hello Kevin,

    The ISO7241 is a digital isolator requiring two supply voltage, on the primary side it is Vcc1, on the secondary side it is Vcc2. Both supply terminals are sinking current.

    Future isolators that provide an internal isolated power supply from the primary to the secondary side are on our roadmap but not available yet.

    To provide power across the isolation barrier we have a transformer driver IC (SN6501) that can provide power to both supply terminal plus ample current drive capability for data converters and amplifier components.

    At the end of the attached data sheet you find plenty circuit  examples for isolated data transmission (RS-232, RS-485, CAN, I2C, etc.), isolated data conversion (ADC and DACs), and isolated high-voltage digital inputs.

    Kind regards,

    Thomas.

     

     

    sn6501.pdf