STK672-440AN-E

Ordering number : ENA2272 STK672-440AN-E Thick-Film Hybrid IC 2-phase Stepper Motor Driver http://onsemi.com Overview The STK672-440AN-E is a hybrid IC for use as a unipolar, 2-phase stepper motor driver with PWM current control. Applications  Office photocopiers, printers, etc. Features  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...