StepStick DRV8825 Stepper Motor Driver

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StepStick DRV8825 Stepper Motor Driver
Excl. Tax: $4.80 Incl. Tax: $6.00

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In Stock

StepStick DRV8825 Stepper Motor Driver
StepStick DRV8825 Stepper Motor Driver is available for purchase in increments of 1
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StepStick DRV8825 Stepper Motor Driver 

DRV8825 current regulation formula: Amot = Vref / (5 ˣ Rs)

Rs on these boards are 0.05 Ohm which reduces the formula to: Amot = 4 ˣ Vref

For more information regarding this chip please refer to the DRV8825 PDF datasheet

The following table compares A4988 Stepper driver boards vs DRV8825 ones, for RepRap use:

 A4988DRV8825
Max. theoretical current 2A 2.5A
Max. microsteps 16 32
Stepper current adjust. trimpot Yes, near Dir pin Yes, near En pin
Typical Rs value 0.05 Ohm or
0.1 Ohm or
0.2 Ohm
0.1 Ohm
Vref formula (*) I_TripMax= Vref/(8*Rs) I_TripMax= Vref/(5*Rs)
Thermal Overload Protection (**) Yes Yes
PCB layers 2 4
Active cooling required? Recommended Recommended
IC packaging 5x5mm 28-lead QFN 9.7x6.4mm 28HTSSOP

Note that some important technical characteristics from the respective datasheets of the ICs are not directly comparable. For example, the DRV8825 is fully specified in terms of thermal characteristics, the A4988 is not. Another important characteristic that unfortunately is not directly comparable is RDSon, which is specified at different current levels in the respective IC datasheets.

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