The ProDrive-2000
Microstepper is quite universal and well suited for driving NEMA 17 to 42 frame, 2-phase stepper motors. It provides sinusoidal phase currents optimized for 10-microsteps per full motor step and transitions to quadrature phase currents as motor speed increases beyond the point where microstepping is no longer beneficial. Bipolar phase current regulation is achieved through PWM chopping at 20kHz., promoting inaudible switching. Phase currents are programmed using an external resistance, which may be fixed or dynamic, with provision for trimming. Automatic phase current reduction to 1/3rd the programmed value is enabled by default and occurs after one-second of stepping inactivity. Additional power conservation can be realized through use of the non-isolated disable command, which inhibits MOSFET gate drive, causing phase outputs to assume a high-impedance state. The anti-resonance circuit provides damping of motor oscillations by leading or lagging the torque wave, resulting in maximum usable motor torque.
