STK672-642AN-E

Ordering number : ENA2277A STK672-642AN-E Thick-Film Hybrid IC 2-phase Stepper Motor Driver http://onsemi.com Overview The STK672-642AN-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).  FAULT signal (active low) is output when overcurrent or overheat is detected.  Built-in power on reset function.  The motor speed is controlled by the frequency of an external clock signal.  2 phase or 1-2 phase excitation switching function.  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 (0.089Ω: 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.  Supports compatible pins with STK672-640AN/-630AN/-632AN-E.  Specifications Absolute Maximum Ratings at Tc = 25C Parameter Symbol Conditions Ratings Unit Maximum supply voltage 1 Maximum supply voltage 2 Input voltage Output current 1 Output current 2 Output current 3 Allowable powe...