Overview
The L6470H, produced by STMicroelectronics, is an advanced fully integrated microstepping motor driver designed for driving two-phase bipolar stepper motors. Realized in analog mixed signal technology, this device integrates a dual low RDS(on) DMOS full bridge with accurate on-chip current sensing circuitry. This allows for non-dissipative current control and overcurrent protection. The L6470H features a unique control system that achieves a true 1/128 steps resolution and supports user-defined motion profiles with acceleration, deceleration, speed, or target position, all programmable through a dedicated set of registers via a standard 5-Mbit/s SPI interface. The device includes a rich set of protections, including thermal, low bus voltage, overcurrent, and motor stall, making it suitable for demanding motor control applications.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage | 8 - 45 V |
| Peak Current | 7.0 A (3.0 A r.m.s.) |
| Package | HTSSOP28, PowerSO 36 |
| Grade | Industrial |
| RoHS Compliance | Ecopack1 (PowerSO 36), Ecopack2 (HTSSOP28) |
| Longevity Commitment | 15 years |
| Operating Temperature | -40°C to 150°C (junction temperature) |
Key Features
- Low RDS(on) Power MOSFETs
- Programmable speed profile and positioning
- Programmable power MOS slew rate
- Up to 1/128 microstepping
- Sensorless stall detection
- SPI interface
- Low quiescent and standby currents
- Programmable non-dissipative overcurrent protection on high and low-side
- Two-levels of overtemperature protection
Applications
The L6470H is suitable for a variety of applications, including:
- Communications equipment
- Computers and peripherals
- Industrial automation
- Personal electronics
Q & A
- What is the operating voltage range of the L6470H?
The operating voltage range is 8 - 45 V.
- What is the peak current capability of the L6470H?
The peak current is 7.0 A (3.0 A r.m.s.).
- What are the available packages for the L6470H?
The device is available in HTSSOP28 and PowerSO 36 packages.
- Is the L6470H RoHS compliant?
- What is the microstepping resolution of the L6470H?
The L6470H supports up to 1/128 microstepping.
- How is the device programmed?
The device is programmed through a standard 5-Mbit/s SPI interface.
- What protections does the L6470H offer?
The device offers thermal, low bus voltage, overcurrent, and motor stall protections.
- What is the longevity commitment for the L6470H?
The longevity commitment is 15 years.
- What are some common applications for the L6470H?
Common applications include communications equipment, computers and peripherals, industrial automation, and personal electronics.
- Where can I find technical support for the L6470H?
Technical support can be obtained from the customer support team of the distributor or directly from STMicroelectronics.
