Description

The L6470 device, 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 RDS(on) DMOS full bridge with all of the power switches equipped with an accurate onchip current sensing circuitry suitable for nondissipative current control and overcurrent protection. 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.

Features

• Operating voltage: 8 - 45 V

• 7.0 A out peak current (3.0 A r.m.s.)

• Low R DS(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

• Bipolar stepper motors