Overview
The L6474PD, produced by STMicroelectronics, is a high-performance stepper motor driver integrated in analog mixed signal technology. It features a dual low RDS(on) DMOS full bridge with all power switches, equipped with accurate on-chip current sensing circuitry. This device is designed for non-dissipative current control and includes robust overcurrent protections. The L6474PD supports up to 1/16 microstepping through an adaptive decay mode, enhancing motor control precision. It also includes a rich set of protections such as thermal, low bus voltage, and overcurrent, making it suitable for demanding motor control applications.
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage | 8 - 45 V |
| Output Peak Current | 7.0 A (3.0 A r.m.s.) |
| Power MOSFETs | Low RDS(on) DMOS |
| Microstepping | Up to 1/16 |
| Current Control | Adaptive decay mode with non-dissipative current sensing |
| SPI Interface | Standard 5 Mbit/s SPI |
| Quiescent and Standby Currents | Low quiescent and standby currents |
| Overcurrent Protection | Programmable non-dissipative overcurrent protection on all power MOS |
| Thermal Protection | Two-level overtemperature protection |
| Package | PowerSO 36 |
| Grade | Industrial |
| RoHS Compliance Grade | Ecopack2 |
| Operating Temperature (°C) | -40 to 150 |
Key Features
- Programmable power MOS slew rate, deadtime, and blanking-time
- Integrated analog to digital converter for torque regulation or user-defined applications
- Internal voltage regulator generating a 3 V voltage from the motor power supply
- Synchronization signal through the SYNC pin
- FLAG pin for indicating alarm conditions such as overcurrent, undervoltage, and thermal warnings
- Reset and standby mode through a dedicated pin
- 8-bit serial peripheral interface (SPI) for synchronous serial communication
Applications
The L6474PD is suitable for a variety of demanding motor control applications, including:
- Industrial automation
- 3D printing and CNC machines
- Medical devices requiring precise motor control
- Automotive systems
- Other high-performance stepper motor applications
Q & A
- What is the operating voltage range of the L6474PD?
The operating voltage range is 8 - 45 V.
- What is the maximum output peak current of the L6474PD?
The maximum output peak current is 7.0 A (3.0 A r.m.s.).
- Does the L6474PD support microstepping?
Yes, it supports up to 1/16 microstepping.
- What type of current control does the L6474PD use?
The L6474PD uses adaptive decay mode with non-dissipative current sensing.
- What interface does the L6474PD use for communication?
The L6474PD uses a standard 5 Mbit/s SPI interface.
- What are the thermal protection features of the L6474PD?
The L6474PD includes two-level overtemperature protection.
- How can the overcurrent protection be configured on the L6474PD?
The overcurrent protection can be programmed through the OCD_TH register in one of 16 available values ranging from 375 mA to 6 A.
- What is the purpose of the SYNC pin on the L6474PD?
The SYNC pin works as a synchronization signal, echoing one of the bits of the EL_POS register based on SYNC_SEL and STEP_SEL parameters.
- Can the L6474PD be reset and put into standby mode?
Yes, the device can be reset and put into standby mode through a dedicated STBY/RST pin.
- What is the package type of the L6474PD?
The package type is PowerSO 36.
