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Home » NEWEST Products » New by Manufacturer » ON Semiconductor » 2-Phase Stepper Motor Drivers - ON Semiconductor
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ON Semiconductor 2-Phase Stepper Motor Drivers

ON Semiconductor 2-Phase Stepper Motor Drivers

ON Semiconductor 2-phase stepper motor drivers with PWM current control. STK682 works with Bipolar Stepper motors, while STK671 works with unipolar stepper motors.

STK672 Features
  • Built-in motor terminal open detection function, overcurrent detection function, overheat detection function (output current OFF).
  • FAULT1 signal (active low) is output when any of motor terminal open, overcurrent or overheat is detected.
  • The FAULT2 signal is used to output the result of activation of protection circuit detection at 3 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 STK672-432BN/-440BN-E.
STK682 Features
  • Output on-resistance (High side 0.3Ω, Low side 0.25Ω, Total 0.55Ω; Ta = 25C, IO= 2.5A)
  • VMmax=36V(DC), Iopmax=3.0A
  • 2, 1-2, W1-2, 2W1-2, 4W1-2, 8W1-2, 16W1-2, 32W1-2 phase excitation are selectable
  • With built-in automatic half current maintenance energizing function
  • Over current protection circuit
  • Thermal shutdown circuit
  • Input pull down resistance
  • With reset pin and enable pin
Applications
  • Office photocopiers
  • Printers

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