[原创]Maxim MAX22204 65V 3.8A步进马达驱动器解决方案

Maxim公司的MAX22204是两相步进马达驱动器,集成了两个65V 最大3.8A的H桥.H桥FET有非常低的阻抗,导致高驱动效率和最小的热量.典型的总RON(高边+低边)是0.3Ω.MAX22204集成了精确电流驱动稳压电路和128微步内置分度器,由STEP/DIR接口控制.高微步进分辨率和先进控制技术保证了平衡和安安静静工作.流进两个低边FET的电流由非耗散集成电流检测(ICS)来检测,然后和所需的步进阈值电流和比较.只要桥电流超过阈值(ITRIP),器件强迫衰减到固定OFF时间(tOFF).器件具有过流保护(OCP),热关断(TSD)和欠压锁住(UVLO).故障条件检测时,漏极开路低FAULT引脚就进行激活.在热关断和欠压锁住期间,驱动器是禁止的,直到正常工作条件恢复.采用5mmx7mm TQFN38封装.主要用在步进马达驱动器.本文介绍了MAX22204主要特性,简化框图,功能框图和应用框图,以及评估板MAX22204 EVK优势,电路图,材料清单和PCB设计图.

 The MAX22204 is a two-phase stepper motor driver. It integrates two 65V, 3.8AMAX H-Bridges. The H-Bridge FETs have very low impedance, resulting in high driving efficiency and minimal heat. The typical total RON (high-side + low-side) is 0.3Ω. The MAX22204 integrates an accurate current drive regulation circuit and a 128-microstep built-in indexer controlled by a STEP/DIR interface. The high microstep resolution and advanced control technique ensure smooth and quiet operations.

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