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.
The AMIS?30542 is ideally suited for general?purpose stepper motor applications in the automotive, industrial, medical, and marine environment. With the on?chip voltage regulator it further reduces the BOM for mechatronic stepper applications.
AMIS?30542主要特性:
Dual H?Bridge for 2?Phase Stepper Motors
Programmable Peak?Current Up to 2.2 A Continuous? (5 A Short Time) Using a 5?bit Current DAC
On?Chip Current Translator
SPI Interface
Speed and Load Angle Output
Seven Step Modes from Full Step Up to 32 Micro?Steps
Fully Integrated Current?Sense
PWM Current Control with Automatic Selection of Fast and Slow Decay
Low EMC PWM with Selectable Voltage Slopes
Active Fly?Back Diodes
Full Output Protection and Diagnosis
Thermal Warning and Shutdown
Compatible with 5 V and 3.3 V Microcontrollers
Integrated 5 V Regulator to Supply External Microcontroller
Integrated Reset Function to Reset External Microcontroller
Integrated Watchdog Function
These Devices are Pb?Free and are RoHS Compliant
图1.AMIS?30542方框图
图2.AMIS?30542典型应用电路
外接元件表:
