Overview
The L6470PD, produced by STMicroelectronics, is an advanced fully integrated microstepping motor driver realized in analog mixed signal technology. It is designed to drive two-phase bipolar stepper motors with high precision and reliability. The device integrates a dual low RDS(on) DMOS full bridge, equipped with accurate on-chip current sensing circuitry for non-dissipative current control and overcurrent protection. The L6470PD features a unique control system that achieves a true 1/128 steps resolution, making it suitable for demanding motor control applications.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage | 8 - 45 V |
| Peak Output Current | 7.0 A (3.0 A r.m.s.) |
| Package | PowerSO 36 |
| Operating Temperature | -25 to +125 °C |
| Thermal Resistance (Junction to Ambient) | 12 °C/W (typical) |
| Interface | Standard 5-Mbit/s SPI |
| Microstepping Resolution | Up to 1/128 steps |
Key Features
- Programmable speed profile and positioning
- Programmable power MOS slew rate
- Sensorless stall detection
- Low quiescent and standby currents
- Programmable non-dissipative overcurrent protection on high and low-side
- Two-levels of overtemperature protection
- Thermal, low bus voltage, overcurrent, and motor stall protections
- Dual SPI connector for daisy chain configuration
- FLAG and BUSY LED indicators
- Adjustable supply voltage compensation
Applications
The L6470PD 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 L6470PD?
The operating voltage range is from 8 V to 45 V.
- What is the peak output current of the L6470PD?
The peak output current is 7.0 A (3.0 A r.m.s.).
- What is the microstepping resolution of the L6470PD?
The microstepping resolution is up to 1/128 steps.
- Does the L6470PD support sensorless stall detection?
Yes, it supports sensorless stall detection.
- What interface does the L6470PD use for communication?
The L6470PD uses a standard 5-Mbit/s SPI interface.
- What are the key protections provided by the L6470PD?
The key protections include thermal, low bus voltage, overcurrent, and motor stall protections.
- What is the thermal resistance (junction to ambient) of the L6470PD?
The thermal resistance is 12 °C/W (typical).
- Can the L6470PD be used in multi-motor applications?
Yes, it supports daisy chain configuration for multi-motor applications.
- What is the operating temperature range of the L6470PD?
The operating temperature range is from -25 to +125 °C.
- Does the L6470PD have programmable overcurrent protection?
Yes, it has programmable non-dissipative overcurrent protection on both high and low sides.
