onsemi STK672-442BN-E

STK672-442BN-E is a hybrid IC designed as a unipolar, two-phase stepper motor driver with PWM current control.

• Built-in motor terminal open detection, overcurrent detection, and overheat detection (output current shutdown).
• When a motor terminal open, overcurrent, or overheat condition is detected, a FAULT1 signal (active low) is output. The FAULT2 signal outputs the detection activation result of the three-level protection circuit.
• Built-in power-on reset function.
• Microstep sinusoidal wave drive activated by external clock input only.
• Excitation mode selectable via external pins: 2, 1-2 (including pseudo-microstep), W1-2, 2W1-2, or 4W1-2.
• Switchable 4-phase distributor switching sequence via external pin (MODE3) to detect both rising and falling edges, or rising edge only, of clock input.
• Phase retention during excitation mode switching, with rotation direction switching capability.
• Schmitt input supporting 2.5V high-level input.
• Built-in current sense resistors (0.122Ω, ±2% tolerance); motor current settable using two external resistors.
• ENABLE pin cuts off output current while retaining excitation mode.
• Wide current setting range for reduced standby power consumption.
• No motor noise in hold mode due to external excitation current control.
• PWM operation uses independent excitation system; PWM phase applies constant-current control with phase shift between Phase A and Phase B.
• Pin-compatible with STK672-432BN/-440BN-E.

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