L6474 Datasheet, PDF (1/51 Pages) STMicroelectronics – easySPIN – fully integrated microstepping motor driver

L6474
easySPIN – fully integrated microstepping motor driver
Features
■ Operating voltage: 8 - 45 V
■ 7.0 A output peak current (3.0 A r.m.s.)
■ Low R_DSon 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
Application
■ Bipolar stepper motor
POWERSO36
HTSSOP28
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.
Description
The L6474, realized in analog mixed signal
technology, integrates a dual low R_DSon 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
Table 1. Device summary
Order codes
Package
L6474H
L6474HTR
L6474PD
L6474PDTR
HTSSOP28
HTSSOP28
POWERSO36
POWERSO36
Packing
Tube
Tape and reel
Tube
Tape and reel
December 2011
Doc ID 022529 Rev 2
1/51
www.st.com
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