dSPIN /L6470 - Fully Integrated Microstepping Motor Driver
dSPIN /L6470 - Fully Integrated Microstepping Motor Driver
The L6470, realized in analog mixed signal technology, is an advanced fully integrated solution suitable for driving two phase bipolar stepper motors with microstepping.
It integrates a dual low RDSon DMOS full bridge with all of the power switches equipped with an accurate on chip current sensing circuitry suitable for non dissipative current control and overcurrent protections. Thanks to a unique control system a true 1/128 steps resolution is achieved. The digital control core can generate user defined motion profiles with acceleration, deceleration, speed or target position easily programmed through a dedicated registers set. All commands and data registers, including those used to set analogue values (i.e. current control value, current protection trip point, dead time, PWM frequency etc.) are sent through a standard 5Mbit/s SPI.
A very rich set of protections (thermal, low bus voltage, overcurrent, motor stall) allows designing a fully protected application, as required by most demanding motor control applications.
features
- Monolithic digital micro-stepping drivers
- Mixed-signal DMOS power technology
- Voltage mode driving, featuring up to 128 micro-steps
- 8...45 V operating voltage
- Output current: 3 ARMS (7 A peak), RDS(on) = 0.28 Ω
- Fully programmable speed profile and positioning
- SPI interface
- Sensorless stall detection
- 8-bit 5 MHz SPI interface (daisy-chain compatible)
- Integrated current sensing (no external shunt)
- Full set of embedded diagnostic and protection functions
- Integrated 16 MHz oscillator, 5-bit ADC and 3 V voltage regulator
- HTSSOP and compact, thermally enhanced QFN packages available
Applications
Industrial:
- Home appliances
- Lighting
- Factory automation
- ATM/ POS
- Medical
- Security
- Vending machines
Printers
Consumer:
- Digital still camera
- Game consoles
- Gambling machines
