L6472 Datasheet | STMicroelectronics

Fully integrated microstepping motor driver - production data Applications - Bipolar stepper motor HTSSOP28 POWERSO36 Features - Operating voltage: 8 - 45 V - 7.0 A output peak current (3.0 A r.m.s.) - Low RDS(on) 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 Description The L6472 device, 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 RDS(on) DMOS full bridge with all of the power switches equipped with an accurate onchip 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. All application mands and data registers, including those used to set analog 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 L6472 device “bullet proof”, as required by the most demanding motor control applications. Order codes L6472H L6472HTR L6472PD L6472PDTR Table 1. Device summary Package HTSSOP28 HTSSOP28 POWERSO36 POWERSO36 Packing Tube Tape and reel...