Overview
The STK672-400 is a hybrid IC designed by onsemi for use as a unipolar, 2-phase stepping motor driver with PWM current control. This component is particularly suited for applications requiring precise motor control and is integrated with various features to enhance its functionality and reliability.
Key Specifications
| Parameter | Symbol | Conditions | Ratings | Unit |
|---|---|---|---|---|
| Maximum supply voltage 1 | VCC max | No signal | 52 | V |
| Maximum supply voltage 2 | VDD max | No signal | -0.3 to +7.0 | V |
| Input voltage | VIN max | Logic input pins | -0.3 to +5.8 | V |
| Output current | IOH max | VDD=5V, CLOCK≥200Hz | 2.2 | A |
| Allowable power dissipation | Pd max | With an arbitrarily large heat sink. Per MOSFET | 7 | W |
| Operating substrate temperature | Tc max | 105 | °C | |
| Junction temperature | Tj max | 150 | °C | |
| Storage temperature | Tstg | -40 to +125 | °C | |
| Operating supply voltage 1 | VCC | With signals applied | 10 to 45 | V |
| Operating supply voltage 2 | VDD | With signals applied | 5±5% | V |
Key Features
- The STK672-400 allows for the selection of various excitation modes (2-phase, 1-2 phase, W1-2 phase, 2W1-2 phase, or 4W1-2 phase) via external pins.
- The phase switching clock edge timing can be set to occur on both rising and falling edges or on rising edge detection only using the MODE3 pin.
- A phase holding function prevents phase skip during excitation mode switching.
- The motor current is set by a voltage divider connected to the Vref pin.
- The CLK input pin includes an internal noise filtering circuit and a Schmidt circuit to enhance noise immunity.
- The ENABLE pin can turn off the motor drive current while retaining the phase excitation state when set low.
- Supports microstep sinusoidal driving with external clock input.
Applications
The STK672-400 is suitable for various applications, including office photocopiers, printers, and other general-purpose motor control systems that require precise and reliable stepping motor operation.
Q & A
- What is the primary function of the STK672-400?
The STK672-400 is a hybrid IC designed for use as a unipolar, 2-phase stepping motor driver with PWM current control. - What are the different excitation modes supported by the STK672-400?
The STK672-400 supports 2-phase, 1-2 phase, W1-2 phase, 2W1-2 phase, and 4W1-2 phase excitation modes. - How is the motor current set in the STK672-400?
The motor current is set by a voltage divider formed by an external resistor connected to the Vref pin. - What is the purpose of the ENABLE pin?
The ENABLE pin turns off the motor drive current for all phases and retains the phase excitation state when set low. - What is the maximum operating substrate temperature for the STK672-400?
The maximum operating substrate temperature is 105°C. - What is the maximum output current of the STK672-400?
The maximum output current is 2.2 A. - Is the STK672-400 RoHS compliant?
Yes, the STK672-400 is RoHS compliant with exemptions. - What is the step resolution of the STK672-400?
The step resolution includes 1, 1/2, 1/4, 1/8, and 1/16 steps. - What type of motor does the STK672-400 support?
The STK672-400 supports unipolar stepping motors. - What is the package type of the STK672-400?
The package type is 19-SIP (Single In-Line Package).
