Overview
The LV8729V-MPB-H is a PWM current-controlled microstep bipolar stepper motor driver produced by onsemi. This driver is designed to control stepper motors with high precision and efficiency. It features a BiCDMOS process IC and supports various excitation modes, including 2-phase, 1-2 phase, W1-2 phase, 2W1-2 phase, 4W1-2 phase, 8W1-2 phase, 16W1-2 phase, and 32W1-2 phase. The driver also includes advanced features such as over-current protection, thermal shutdown, and forward/reverse control.
Key Specifications
| Parameter | Symbol | Conditions | Ratings | Unit |
|---|---|---|---|---|
| Supply voltage range | VM | VM, VM1, VM2 | 9 to 32 | V |
| Logic input voltage | VIN | ST, MD1, MD2, MD3, OE, RST, FR, STEP | 0 to 5 | V |
| VREF input voltage range | VREF | 0 to 3 | V | |
| Standby mode current drain | IMst | ST = “L”, VM+VM1+VM2 | 70 to 100 | μA |
| Current drain | IM | ST = “H”, OE = “H”, no load, VM+VM1+VM2 | 3.3 to 4.6 | mA |
| Thermal shutdown temperature | TSD | Design guarantee | 150 to 200 | °C |
| Thermal hysteresis width | ΔTSD | Design guarantee | 40 | °C |
| Output on-resistance (upper side) | Ta = 25°C, IO = 1.8A | 0.35Ω | Ω | |
| Output on-resistance (lower side) | Ta = 25°C, IO = 1.8A | 0.3Ω | Ω | |
| Output on-resistance (total of upper and lower) | Ta = 25°C, IO = 1.8A | 0.65Ω | Ω |
Key Features
- Single-channel PWM current control stepper motor driver.
- BiCDMOS process IC.
- Supports multiple excitation modes: 2-phase, 1-2 phase, W1-2 phase, 2W1-2 phase, 4W1-2 phase, 8W1-2 phase, 16W1-2 phase, and 32W1-2 phase.
- Advance the excitation step with the only step signal input.
- Available forward/reverse control.
- Over-current protection circuit.
- Thermal shutdown circuit.
- Input pull-down resistance.
- With reset pin and enable pin.
- Output short-circuit protection circuit.
- Open-drain pin for switching holding current.
Applications
The LV8729V-MPB-H is suitable for various applications requiring precise control of bipolar stepper motors, including but not limited to:
- Industrial automation systems.
- Medical devices.
- 3D printers and CNC machines.
- Robotics and mechatronics.
- Aerospace and defense systems.
Q & A
- What is the supply voltage range for the LV8729V-MPB-H?
The supply voltage range is from 9V to 32V. - What are the supported excitation modes?
The driver supports 2-phase, 1-2 phase, W1-2 phase, 2W1-2 phase, 4W1-2 phase, 8W1-2 phase, 16W1-2 phase, and 32W1-2 phase excitation modes. - What is the thermal shutdown temperature?
The thermal shutdown temperature is between 150°C and 200°C. - Does the driver have over-current protection?
Yes, the driver includes an over-current protection circuit. - How is the chopping frequency set?
The chopping frequency is set by a capacitor between the OSC1 pin and GND. - What is the function of the EMO pin?
The EMO pin is an over-current detection alarm output pin. - Can the driver control the direction of the stepper motor?
Yes, the driver supports forward/reverse control via the FR pin. - What is the purpose of the ST pin?
The ST pin is the chip enable pin, which releases the stand-by mode when set high. - How does the output enable function work?
When the OE pin is set low, the output is forced OFF and goes to high impedance. - What is the package type for the LV8729V-MPB-H?
The package type is SSOP44K (275mil), Pb-Free and Halogen Free.
