Hybrid Motor Driver ICs

By ON Semiconductor 335

Hybrid Motor Driver ICs

ON Semiconductor's STK672 series of hybrid motor driver ICs use power MOSFETs in the output stage and are used to drive stepper motors. Based on a uni-polar constant-current PWM system, the devices include a built-in micro-stepping controller and support five excitation methods: 2 phase, 1-2 phase, W1-2 phase, 2W1-2 phase and 4W1-2 phase. In addition, they can provide control of the basic stepping angle of the stepping motor, divided into 1/16 step units and allowing the motor speed to be controlled with only a clock signal. The use of this hybrid IC allows designers to implement systems that provide high motor torques, low vibration levels, fast response, and high efficiency drive.

The STK681 series of hybrid motor driver ICs are designed for current control of DC brushed motors. The devices allow forward, reverse, and brake operations in accordance with the external input signal. These devices are available with a range of peak startup output current and peak output brake currents. They have current sensing resistors built-in which facilitates a space-saving design.

STK672 Series Features and Benefits
  • Built-in micro-stepping controller
  • Built-in current detection resistors
  • Hollow packages
  • Easy to switch between full-step, half-step, 1/4, 1/8, and 1/16 steps with prevention of jumping between phases
  • Easy to design and reduce the mounting area
  • Protection from smoke and fires
STK681 Series Features and Benefits
  • PWM operation
  • Built-in protective functions
  • No need for dead time design
  • Built in current detection resistor for STK681-300, 310 and 320
  • Built in thermal shut down for STK681-332-E and 352-E
  • Allows peak current control
  • Include functions against over-current, short to ground, and short to supply
  • Easy to achieve design for safety
  • Thermal protection
End Products
  • Slot machines
  • Vending machines
  • Multi-function printers
  • Computing and peripherals
  • Industrial