L6472 Datasheet, PDF (1/69 Pages) STMicroelectronics – dSPIN fully integrated microstepping motor driver

L6472
dSPIN fully integrated microstepping motor driver
with motion engine and SPI
Features
■ Operating voltage: 8 - 45 V
■ 7.0 A output peak current (3.0 A r.m.s.)
■ Low R_DSon power MOSFETs
■ Programmable speed profile
■ Programmable Power MOSFET slew rate
■ Up to 1/16 microstepping
■ Predictive current control with adaptive decay
■ Non-dissipative current sensing
■ SPI interface
■ Low quiescent and standby currents
■ Programmable non-dissipative overcurrent
protection on all Power MOSFETs
■ Two levels of overtemperature protection
Applications
■ Bipolar stepper motor
Description
The L6472, 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 R_DS(on) DMOS full bridge with all of the
power switches equipped with an accurate on-
chip current sensing circuitry suitable for non-
dissipative current control and overcurrent
protection. Thanks to a new current control, a
1/16 microstepping is achieved through an
adaptive decay mode which outperforms
traditional implementations. The digital control
core can generate user defined motion profiles
with acceleration, deceleration, speed or target
position, easily programmed through a dedicated
register set.
POWERSO36
HTSSOP28
All application commands and data registers,
including those used to set analog 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 L6472 “bullet
proof”, as required by the most demanding motor
control applications.
Table 1. Device summary
Order codes
Package
L6472H
L6472HTR
L6472PD
L6472PDTR
HTSSOP28
HTSSOP28
POWERSO36
POWERSO36
Packing
Tube
Tape and reel
Tube
Tape and reel
January 2012
Doc ID 022729 Rev 1
1/69
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