ST has released a new evaluation board for a stepper motor driver. It’ll plug right into your 3D printer, and if you’re looking for a chip to build a cheap 3D printer controller board a… ...

Consequently, the motor driver chip can handle continuous currents of ±1.5 A and operating voltages up to 50 V. The R DS (ON) for the output DMOS transistors is 270 mΩ (typical).