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L6474H 数据表(PDF) 1 Page - STMicroelectronics

部件名 L6474H
功能描述  easySPIN ??fully integrated microstepping motor driver
Download  51 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L6474H 数据表(HTML) 1 Page - STMicroelectronics

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December 2011
Doc ID 022529 Rev 2
1/51
51
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 RDSon 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
Description
The L6474, realized in analog mixed signal
technology, integrates a dual low RDSon 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 codes
Package
Packing
L6474H
HTSSOP28
Tube
L6474HTR
HTSSOP28
Tape and reel
L6474PD
POWERSO36
Tube
L6474PDTR
POWERSO36
Tape and reel
www.st.com


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