On Semi AMIS-30542微步进马达驱动方案

On Semi公司的 AMIS-30542是微步进的步进马达驱动器,通过I/O引脚和SPI接口与外接MCU连接. AMIS-30542集成了片上电压稳压器,重置输出和看门狗重置,具有两个用于两相步进马达的H桥,可编程峰值电流高达2.2A,和5V与3.3V MCU兼容.本文介绍AMIS-30542主要特性,方框图以及应用电路和外接元件列表.

The AMIS−30542 is a micro−stepping stepper motor driver for bipolar stepper motors. The chip is connected through I/O pins and a SPI interface with an external microcontroller. It has an on−chip voltage regulator, reset−output and watchdog reset, able to supply peripheral devices. AMIS−30542 contains a current−translation table and takes the next micro−step depending on the clock signal on the “NXT” input pin and the status of the “DIR” (=direction) register or input pin. The chip provides a so−called “speed and load angle” output. This allows the creation of stall detection algorithms and control loops based on load−angle to adjust torque and speed. It is using a proprietary PWM algorithm for reliable current control.

The AMIS−30542 is implemented in I2T100 technology, enabling both high−voltage analog circuitry and digital functionality on the same chip. The chip is fully compatible with the automotive voltage requirements.
..

查看全文