ST L6474+STM32F105 3D打印机解决方案

ST公司的即插即用3D打印机解决方案STEVAL-3DP001V1是基于L6474微步进马达驱动器和高性能32位STM32F105xx系列MCU,适用于任何3D打印机理,可驱动6轴和可编马达电流,嵌入Wi-Fi模块可控制手持社,可控制3个热点和3个风扇,支持3个加热床,支持USB和microSD外设,主要用于教学,原型机,牙齿,医疗和珠宝等行业.本文主要介绍了L6474主要特性和框图,STM32F105xx框图以及基于L6474和STM32™微步进马达开发板EVAL6474H-DISC主要特性,电路图,材料清单和PCB布局图和3D打印机解决方案STEVAL-3DP001V1主要特性和优势与框图.
The L6474 device, realized in analog mixed signal technology, integrates a dual low RDS(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, deadtime, etc.) are sent through a standard 5 Mbit/s SPI.A very rich set of protections (thermal, low bus voltage, overcurrent) makes the L6474 device “bullet proof” as required by the most demanding motor control applications.
L6474主要特性:
Operating voltage: 8 - 45 V
7.0 A output peak current (3.0 Ar.m.s. )
Low RDS(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
L6474应用:
Bipolar stepper motor

图1.L6474框图
The STM32F105xx device incorporates the high-performance ARM®Cortex™-M3 32-bit RISC core operating at a 72 MHz frequency, high-speed embedded memories (Flash memory up to 256 Kbytes and SRAM 64 Kbytes), and an e...