onsemi STK672-442AN-E

The STK672-442AN-E is a hybrid IC for use as a unipolar, 2-phase stepper motor driver with PWM current control.

• Built-in overcurrent detection function, overheat detection function (output current OFF).
• FAULT1 signal (active low) is output when overcurrent or overheat is detected.
• The FAULT2 signal is used to output the result of activation of protection circuit detection at 2 levels.
• Built-in power on reset function.
• A micro-step sine wave-driven driver can be activated merely by inputting an external clock.
• External pins can be used to select 2, 1-2 (including pseudo-micro), W1-2, 2 W1-2, or 4W1-2 excitation.
• The switch timing of the 4-phase distributor can be switched by setting an external pin (MODE3) to detect either the rise and fall, or rise only, of CLOCK input.
• Phase is maintained even when the excitation mode is switched. Rotational direction switching function.
• Supports schmitt input for 2.5V high level input.
• Incorporating a current detection resistor (0.122Ω: resistor tolerance ±2%), motor current can be set using two external resistors.
• The ENABLE pin can be used to cut output current while maintaining the excitation mode.
• With a wide current setting range, power consumption can be reduced during standby.
• No motor sound is generated during hold mode due to external excitation current control.
• PWM operation is separately excited system. As for PWM phase the constant current control which shifts the phase of Ach Bch.
• Supports compatible pins with STK672-440AN/-430AN/-432AN-E.

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