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AN44183A
37V / 4.0A Microstepping Motor Driver
FEATURES
Built-in decoder for micro steps (2-phase, half step, 1-2 phase, W1-2 phase ,2W1-2 phase, and 4W1-2 phase excitation ) → Stepping motor can be driven by only external clock signal
Interface: Clock (Rising edge detection and both edge detection)
PWM can be driven by built-in CR (2-value can be selected
during PWM OFF period.)
→The selection of PWM OFF period enables the best PWM drive. Mix Decay control (4-value can be selected for Fast Decay ratio)
→ Mix Decay control can improve accuracy of motor current waveform. Built-in over-current protection (OCP)
→ If the current flows to motor output more than the setup value due to ground-fault etc., the OCP operates and all motor outputs are turned OFF.