ST L6474+STM32F105 3D打印机解决方案.docxVIP

ST L6474+STM32F105 3D打印机解决方案时间：2016-08-03 09:49:52?????? 作者：ST?????? 来源：中电网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 microsteppingCurrent 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 extensive range of enhanced I/O and peripherals connected to two APB buses. All devices offer two 12-bit ADCs, four general-purpose 16-bit timers plus a PWM timer, as well as standard and advanced communication interfaces: up to t