Overview
The STK672-400B-E is a hybrid IC designed for driving unipolar, 2-phase stepper motors with PWM current control. It is part of the STK672 series from onsemi and features a built-in microstepping controller. This IC is based on a unipolar constant-current PWM system, which simplifies applications and standardizes the control of stepper motors. It supports various excitation methods, including 2 phase, 1-2 phase, W1-2 phase, 2W1-2 phase, and 4W1-2 phase excitations, allowing for precise control of the stepper motor's stepping angle down to 1/16 step units. The STK672-400B-E enables designers to implement systems with high motor torques, low vibration levels, low noise, fast response, and high-efficiency drive.
Key Specifications
| Parameter | Symbol | Conditions | Ratings | Unit |
|---|---|---|---|---|
| Maximum supply voltage 1 | VCC1 max | No signal | 52 | V |
| Maximum supply voltage 2 | VCC2 max | No signal | -0.3 to +7.0 | V |
| Input voltage | VIN max | Logic input pins | -0.3 to +7.0 | V |
| Output current | IOH max | 0.5s, 1 pulse, with VCC1 applied | 3.3 | A |
| Operating IC substrate temperature | Tc max | 105 | °C | |
| Junction temperature | Tj max | 150 | °C | |
| Storage temperature | Tstg | -40 to +125 | °C | |
| Supply voltage 1 | VCC1 | With signals applied | 10 to 45 | V |
| Supply voltage 2 | VCC2 | With signals applied | 5 ± 5% | V |
| Output current 1 | IOH1 | Tc = 105°C, CLK ≥ 200Hz | 2.8 | A |
| Output current 2 | IOH2 | Tc = 80°C, CLK ≥ 200Hz | 3 | A |
| Step Resolution | 1, 1/2, 1/4, 1/8, 1/16 | |||
| Package / Case | 19-SSIP Formed Leads | |||
| Mounting Type | Through Hole |
Key Features
- Microstepping Controller: Built-in microstepping controller allows for precise control of the stepper motor's stepping angle down to 1/16 step units.
- Protective Functions: Includes protective functions against over-current, over-heat, and motor terminal open.
- Current Detection Resistors: Built-in current detection resistors for accurate current control.
- Power MOSFETs: Uses power MOSFETs in the output stage for low drive loss and high efficiency.
- Excitation Methods: Supports five excitation methods: 2 phase, 1-2 phase, W1-2 phase, 2W1-2 phase, and 4W1-2 phase excitations.
- Clock Signal Control: Allows motor speed to be controlled with only a clock signal.
Applications
- Computing & Peripherals: Suitable for use in printers, scanners, and other computing peripherals.
- Industrial: Used in various industrial applications requiring precise motor control.
- End Products: Commonly used in multi-function printers, document scanners, security cameras, and vending machines.
Q & A
- What type of motor does the STK672-400B-E drive?
The STK672-400B-E drives unipolar, 2-phase stepper motors.
- What is the step resolution of the STK672-400B-E?
The STK672-400B-E supports step resolutions of 1, 1/2, 1/4, 1/8, and 1/16 step units).
- What protective functions does the STK672-400B-E have?
The STK672-400B-E includes protective functions against over-current, over-heat, and motor terminal open).
- What is the maximum output current of the STK672-400B-E?
The maximum output current is 3.3 A at Tc = 105°C and CLK ≥ 200Hz).
- What is the operating temperature range of the STK672-400B-E?
The operating temperature range is from 0°C to 105°C).
- What package type is the STK672-400B-E available in?
The STK672-400B-E is available in a 19-SSIP Formed Leads package).
- How is the motor speed controlled in the STK672-400B-E?
The motor speed can be controlled with only a clock signal).
- What excitation methods are supported by the STK672-400B-E?
The STK672-400B-E supports five excitation methods: 2 phase, 1-2 phase, W1-2 phase, 2W1-2 phase, and 4W1-2 phase excitations).
- Does the STK672-400B-E use power MOSFETs?
Yes, the STK672-400B-E uses power MOSFETs in the output stage for low drive loss and high efficiency).
- What are some common applications of the STK672-400B-E?
Common applications include multi-function printers, document scanners, security cameras, and vending machines).
