Overview
The L6472H device, produced by STMicroelectronics, is an advanced fully integrated solution designed for driving two-phase bipolar stepper motors with microstepping capabilities. Realized in analog mixed signal technology, it 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 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. The L6472H is known for its robust set of protections, including thermal, low bus voltage, and overcurrent protection, making it suitable for demanding motor control applications.
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 Resolution | Up to 1/16 |
| Current Sensing | Non-dissipative |
| Interface | SPI (5-Mbit/s) |
| Quiescent and Standby Currents | Low |
| Overcurrent Protection | Programmable non-dissipative on all power MOSFETs |
| Overtemperature Protection | Two levels |
| Package Options | HTSSOP28, PowerSO 36 |
| 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 L6472H is primarily used for driving two-phase bipolar stepper motors in various applications, including:
- Industrial automation
- Medical devices
- Printers and plotters
- Textile and sewing machines
- Other precision motion control systems
Q & A
- What is the operating voltage range of the L6472H?
The operating voltage range is 8 - 45 V.
- What is the maximum output peak current of the L6472H?
The maximum output peak current is 7.0 A (3.0 A r.m.s.).
- What is the microstepping resolution of the L6472H?
The microstepping resolution is up to 1/16.
- What type of current sensing does the L6472H use?
The L6472H uses non-dissipative current sensing.
- What interface does the L6472H use for command and data transfer?
The L6472H uses a standard 5-Mbit/s SPI interface.
- Does the L6472H have overcurrent protection?
Yes, the L6472H has programmable non-dissipative overcurrent protection on all power MOSFETs.
- What are the package options for the L6472H?
The package options are HTSSOP28 and PowerSO 36.
- What is the operating temperature range of the L6472H?
The operating temperature range is -40°C to 150°C.
- What types of protections does the L6472H offer?
The L6472H offers thermal, low bus voltage, and overcurrent protections.
- How are motion profiles programmed in the L6472H?
Motion profiles are programmed through a dedicated register set via the SPI interface.
