Pololu DRV8824 User Manual Download

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https://eckstein-shop.de/

POLOLU DRV8825 STEPPER MOTOR DRIVER

CARRIER, HIGH CURRENT

USER’S GUIDE

USING THE DRIVER

Minimal wiring diagram for connecting a microcontroller to a

DRV8824/DRV8825 stepper motor driver carrier (full-step mode).

POWER CONNECTIONS

The driver requires a motor supply voltage of 8.2 – 45 V to be connected across

VMOT and GND. This supply should have appropriate decoupling capacitors close to

the board, and it should be capable of delivering the expected stepper motor current.

Warning: This carrier board uses low-ESR ceramic capacitors, which makes it

susceptible to destructive LC voltage spikes, especially when using power leads longer

than a few inches. Under the right conditions, these spikes can exceed the 45 V

Summary of Contents for DRV8824

Page 1: ...uires a motor supply voltage of 8 2 45 V to be connected across VMOT and GND This supply should have appropriate decoupling capacitors close to the board and it should be capable of delivering the exp...

Page 2: ...1 8 or 200 steps per revolution which applies to full steps A microstepping driver such as the DRV8825 allows higher resolutions by allowing intermediate step locations which are achieved by energizi...

Page 3: ...DIR disconnected The chip has three different inputs for controlling its power states RESET SLEEP and ENBL For details about these power states see the datasheet Please note that the driver pulls the...

Page 4: ...y as might happen if you use this board in a system designed for the pin compatible A4988 carrier In such a system the 10k resistor between SLEEP and FAULT would then act as a pull up for SLEEP making...

Page 5: ...ent sense resistors are 0 100 The ref pin voltage is accessible on a via that is circled on the bottom silkscreen of the circuit board The current limit relates to the reference voltage as follows So...

Page 6: ...power supply can be quite a bit lower than the coil current the driver and coil basically act like a switching step down power supply Also if the supply voltage is very high compared to what the moto...

Page 7: ...wo modules that should be noted however DRV8825 stepper motor driver carrier The pin used to supply logic voltage to the A4988 is used as the DRV8825 s FAULT output since the DRV8825 does not require...

Page 8: ...using the A4988 The DRV8825 has a higher maximum supply voltage than the A4988 45 V vs 35 V which means the DRV8825 can be used more safely at higher voltages and is less susceptible to damage from LC...

Page 9: ...9 https eckstein shop de Alternative minimal wiring diagram for connecting a microcontroller to a DRV8824 DRV8825 stepper motor driver carrier full step mode...