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Operating Current Of Stepper Driver IC?

eem2am

Aug 3, 2009
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Aug 3, 2009
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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.
 
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(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Jan 21, 2010
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However, i am not sure if this 60mA value refers to when the internal h-bridge transistors are being switched or not.

It matters not. This is the maximum current it will draw if the device is being used within its specified limits.

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?

I would not.
 
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