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Operating Current Of Stepper Driver IC?

Discussion in 'Sensors and Actuators' started by eem2am, Dec 27, 2010.

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  1. eem2am

    eem2am

    414
    0
    Aug 3, 2009
    Hello,

    -we are using the NJM2673 dual H-bridge stepper driver IC to power our stepper motor.

    This IC has a 5V input to power its control circuitry.

    NJM2673 DATASHEET:
    http://www.2shared.com/document/_rlD5vgE/NJM2673_E1__STEPPER_DRIVER.html



    At the top of page 5 of the NJM2673 datasheet, it says that the operating current is 60mA max.

    However, i am not sure if this 60mA value refers to when the internal h-bridge transistors are being switched or not.

    do you believe that when this IC starts switching the transistors of its h-bridges, that the operating current taken by its 5V input will likely be much more than 60mA?

    ...after all, the h-bridge transistors are BJTs, and there are 8 of them, and they are obviously going to need base current.
     
    Last edited: Dec 27, 2010
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,473
    2,818
    Jan 21, 2010
    It matters not. This is the maximum current it will draw if the device is being used within its specified limits.

    I would not.
     
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