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Pololu High-Power Stepper Motor Driver 36v4

Pololu item #: 3730
Brand: Pololu supply outlook
Status: Active and Preferred 
RoHS 3 compliant

Price break Unit price (US$)
1 24.95
5 22.95
25 21.12
100 19.43

backorders allowed

This discrete MOSFET stepper motor driver enables control of one bipolar stepper motor. It supports a wide 8 V to 50 V operating voltage range and can deliver up to 4 A continuous per phase without a heat sink or forced air flow (6 A max with sufficient additional cooling). The SPI interface allows configuration of the current limiting, step mode (9 step modes from full-step through 1/256-step), decay mode, and stall detection. The driver also provides back-EMF feedback that can be used for more advanced control and stall detection algorithms. Additional features include reverse-voltage, under-voltage, and over-current protection.

 Description Specs (14) Pictures (13) Resources (8) FAQs (3) On the blog (1) 


Size: 1.3″ × 1.2″
Weight: 4.9 g1

General specifications

Minimum operating voltage: 8 V
Maximum operating voltage: 50 V
Continuous current per phase: 4 A2
Maximum current per phase: 6 A3
Minimum logic voltage: 1.5 V
Maximum logic voltage: 5.5 V
Microstep resolutions: full, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256
Current limit control: SPI-programmable
Reverse voltage protection?: Y4
Header pins soldered?: N

Identifying markings

PCB dev codes: md38a, md38b
Other PCB markings: 0J12286, 0J12459


Without included optional headers or terminal blocks.
Without a heat sink or forced air flow.
With sufficient additional cooling. This limitation comes from the 30 mΩ current sense resistors, which are rated for 1 W.
To -40 V. Connecting supplies over 40 V in reverse can damage the device.

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