Stepping Motor Driver 36-Pin PowerSO T/R

The L6474 device, realized in analog mixed signal technology, integrates a dual low RDS(on)DMOS full bridge with all power switches equipped with an accurate on-chip current sensing circuitry suitable for non-dissipative current control and overcurrent protections. Thanks to a new current control, a 1/16 microstepping is achieved through an adaptive decay mode which outperforms traditional implementations.All data registers, including those used to set analogue values (i.e.: current control value, current protection trip point, deadtime, etc.) are sent through a standard 5 Mbit/s SPI.A very rich set of protections (thermal, low bus voltage, overcurrent) makes the L6474 device “bullet proof” as required by the most demanding motor control applications.

Operating voltage: 8 - 45 V

7.0 A output peak current (3.0 A_r.m.s.)

Low R_DS(on)power MOSFETs

Programmable power MOS slew rate

Up to 1/16 microstepping

Current control with adaptive decay

Non-dissipative current sensing

SPI interface

Low quiescent and standby currents

Programmable non-dissipative overcurrent protection on all power MOS

Two-level overtemperature protection