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StepStick DRV8825 Stepper Motor Driver
In stock
DRV8825
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 informati...
€3.05
NOTE! Danish VAT (25%) is included to this price
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:
| A4988 | DRV8825 | |
|---|---|---|
| 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.