STMicroelectronics Stepper motor driver mounting the L6474 in high power PowerSO package EVAL6474PD EVAL6474PD Fiche De Données

Codes de produits
EVAL6474PD
Page de 52
This is information on a product in full production. 
December 2012
Doc ID 022529 Rev 3
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L6474
easySPIN – fully integrated microstepping motor driver
Datasheet 
 production data
Features
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
Applications
Bipolar stepper motor
Description
The L6474, realized in analog mixed signal 
technology, integrates a dual low R
DS(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, dead time, etc.) are 
sent through a standard 5 Mbit/s SPI.
A very rich set of protections (thermal, low bus 
voltage, overcurrent) makes the L6474 “bullet 
proof” as required by the most demanding motor 
control applications.
 
HTSSOP28
POWERSO36
Table 1.
Device summary 
Order code
Package 
Packing 
L6474H
HTSSOP28 Tube
L6474HTR 
HTSSOP28 
Tape and reel
L6474PD
POWERSO36 Tube
L6474PDTR 
POWERSO36 
Tape and reel