ST L6482H微步距步进马达驱动解决方案
ST公司的L6482H是采用模拟混合信号技术的微步距步进马达驱动器,集成了用来驱车两相双极MOSFET功率级的两个全桥栅极驱动器.采用全新的电流控制,可获得者/16的微步距,工作电压7.5 V-85 V.本文介绍了L6482H主要特性,框图,应用电路图及其材料清单,评估板EVAL6482H主要特性,电路图,材料清单和PCB文件设计图.
The L6482 device, realized in analog mixedsignal technology, is an advanced fully integratedsolution suitable for driving two-phase bipolarstepper motors with microstepping.
It integrates a dual full bridge gate driver forN-channel MOSFET power stages with embedded non dissipative overcurrent protection.
Thanks to a new current control, a 1/16microstepping is achieved through an adaptive decay mode which outperforms traditionalimplementations. The digital control core can generate user defined motion profiles withacceleration, deceleration, speed or target position easily programmed through a dedicatedregister set. All application commands and dataregisters, including those used to set analogvalues (i.e. current protection trip point,deadtime,PWM frequency, etc.) are sent through a standard5-Mbit/s SPI. A very rich set of protections(thermal, low bus voltage, overcurrent and motorstall) makes the L6482 device “bullet proof”, asrequired by the most demanding motor controlapplications.
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