Overview
The L6472HTR, produced by STMicroelectronics, is an advanced fully integrated microstepping motor driver designed for driving two-phase bipolar stepper motors. It is realized in analog mixed signal technology and integrates a dual low RDS(on) DMOS full bridge. This device is equipped with accurate on-chip current sensing circuitry for non-dissipative current control and overcurrent protection. The L6472HTR features a new current control mechanism that achieves up to 1/16 microstepping through an adaptive decay mode, outperforming traditional implementations. The digital control core allows for user-defined motion profiles with acceleration, deceleration, speed, or target position, all easily programmed through a dedicated register set via a standard 5-Mbit/s SPI interface.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage | 8 - 45 V |
| Output Peak Current | 7.0 A (3.0 A r.m.s.) |
| Power MOSFETs | Low RDS(on) |
| Microstepping | Up to 1/16 |
| Current Control | Predictive with adaptive decay |
| Current Sensing | Non-dissipative |
| Interface | 5-Mbit/s SPI |
| Quiescent and Standby Currents | Low |
| Overcurrent Protection | Programmable non-dissipative on all power MOSFETs |
| Overtemperature Protection | Two levels |
| Package | HTSSOP28 |
| Operating Temperature | -40°C to 150°C |
Key Features
- Programmable speed profile
- Programmable power MOSFET slew rate
- Predictive current control with adaptive decay
- Non-dissipative current sensing
- SPI interface for command and data transfer
- Low quiescent and standby currents
- Programmable non-dissipative overcurrent protection on all power MOSFETs
- Two levels of overtemperature protection
- Rich set of protections including thermal, low bus voltage, and overcurrent
Applications
The L6472HTR is suitable for a variety of applications involving bipolar stepper motors, particularly in demanding motor control scenarios. These include:
- Industrial automation
- Medical devices
- Printers and scanners
- Automotive systems
- Any application requiring precise and reliable motor control
Q & A
- What is the operating voltage range of the L6472HTR?
The operating voltage range is 8 - 45 V.
- What is the maximum output peak current of the L6472HTR?
The maximum output peak current is 7.0 A (3.0 A r.m.s.).
- What type of microstepping does the L6472HTR support?
The L6472HTR supports up to 1/16 microstepping.
- How does the L6472HTR manage current control?
The L6472HTR uses predictive current control with adaptive decay.
- What interface does the L6472HTR use for command and data transfer?
The L6472HTR uses a 5-Mbit/s SPI interface.
- Does the L6472HTR have overcurrent protection?
Yes, the L6472HTR has programmable non-dissipative overcurrent protection on all power MOSFETs.
- What are the package options for the L6472HTR?
The L6472HTR is available in HTSSOP28 package.
- What is the operating temperature range of the L6472HTR?
The operating temperature range is -40°C to 150°C.
- What types of protections does the L6472HTR offer?
The L6472HTR offers thermal, low bus voltage, and overcurrent protections.
- How is the L6472HTR programmed for motion profiles?
The L6472HTR is programmed through a dedicated register set via the SPI interface.
