Overview
The STK672-432AN-E is a hybrid IC designed by ON Semiconductor for use as a unipolar, 2-phase stepper motor driver with PWM current control. This device is part of the STK672 series and is known for its robust features and reliability in various applications. It integrates both control and power stages, making it a fully integrated solution for stepper motor control.
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 6.0 | V |
| Input voltage | Vin max | Logic input pins | -0.3 to 6.0 | V |
| Output current 1 | IOP max | 10μs, 1 pulse (resistance load) | 10 | A |
| Output current 2 | IOH max | VDD = 5V, CLOCK ≥ 200Hz | 2.5 | A |
| Allowable power dissipation 1 | PdMF max | With an arbitrarily large heat sink. Per MOSFET | 7.3 | W |
| Allowable power dissipation 2 | PdPK max | No heat sink | 2.8 | W |
| Operating substrate temperature | Tcmax | 105 | °C | |
| Junction temperature | Tjmax | 150 | °C | |
| Storage temperature | Tstg | -40 to 125 | °C |
Key Features
- Built-in overcurrent detection function and overheat detection function with output current OFF.
- FAULT1 signal (active low) outputs when overcurrent or overheat is detected. FAULT2 signal outputs the result of activation of protection circuit detection at two levels.
- Built-in power on reset function.
- Micro-step sine wave-driven driver can be activated by inputting an external clock.
- External pins can select 2, 1-2 (including pseudo-micro), W1-2, 2W1-2, or 4W1-2 excitation modes.
- 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.
- Rotational direction switching function.
- Supports Schmitt input for 2.5V high level input.
- Incorporating a current detection resistor (0.152Ω: resistor tolerance ±2%) to set motor current using two external resistors.
- ENABLE pin can cut output current while maintaining the excitation mode.
- Wide current setting range to reduce power consumption during standby.
- No motor sound is generated during hold mode due to external excitation current control.
- PWM operation is separately excited system with constant current control.
- Compatible pins with STK672-430AN/-440AN/-442AN-E.
Applications
- Office photocopiers and printers.
- Other applications requiring precise stepper motor control, such as in industrial automation, medical devices, and consumer electronics.
Q & A
- What is the primary function of the STK672-432AN-E?
The STK672-432AN-E is a hybrid IC designed for use as a unipolar, 2-phase stepper motor driver with PWM current control.
- What are the key protection features of the STK672-432AN-E?
The device includes built-in overcurrent detection and overheat detection functions, with corresponding FAULT1 and FAULT2 signals.
- How does the power on reset function work?
The power on reset function initializes internal IC operations when power is supplied, with a typical setting of 4V for power on reset.
- What excitation modes can be selected using external pins?
The device allows selection of 2, 1-2 (including pseudo-micro), W1-2, 2W1-2, or 4W1-2 excitation modes using external pins.
- How is the rotational direction switched?
The rotational direction can be switched using the CWB pin.
- What is the purpose of the ENABLE pin?
The ENABLE pin can be used to cut output current while maintaining the excitation mode.
- How is motor current set?
Motor current can be set using two external resistors and the built-in current detection resistor (0.152Ω).
- What is the significance of the FAULT1 and FAULT2 signals?
FAULT1 outputs a low level when overcurrent or overheat is detected, while FAULT2 outputs the result of activation of protection circuit detection at two levels.
- What are the typical applications of the STK672-432AN-E?
The device is typically used in office photocopiers, printers, and other applications requiring precise stepper motor control.
- What is the maximum operating substrate temperature of the STK672-432AN-E?
The maximum operating substrate temperature is 105°C.
- What is the maximum junction temperature of the STK672-432AN-E?
The maximum junction temperature is 150°C.
