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TCAN1463-Q1: IIO(wake) current

Martin Steube-Henkel
Intellectual 1250 points
Part Number: TCAN1463-Q1

Hello Eric,

the TCAN1463-Q1 datasheet mention on page 31 how to calculate the series resistor for the wake pin.

RSERIES is calculated using: RSERIES = VSUPMAX / IIO(WAKE)

IIO(WAKE) is not specified in the datasheet with max data only.. 

Using the 33k from the application circuit I calculate approx 1.36mA. 

Will this drawn from the battery all the time?

Thanks 

Martin

  • 0
    Guru 243220 points

    As shown below equation 3, IIO(WAKE) is 3 mA.

    The WAKE pin is a high-impedance CMOS input; the series resistor is needed only when the voltage exceeds the valid input voltage limits.

  • 0
    TI__Mastermind 23513 points

    Hi Martin,

    I agree with Clemens' response here. If you continue just past page 31 on the top of page 32, you can see that VSUPMAX = 45V, IIO(WAKE) = 3mA which yields a series RSERIES value of 15 kohm minimum. 

    The Wake pin on this device is a high-impedance CMOS input. The current dissipation from this pin would be a small amount of leakage +/- 3uA. 

    Regards,

    Tyler