AMIS-30522中文資料安森美半導(dǎo)體數(shù)據(jù)手冊PDF規(guī)格書

Introduction

The AMIS?30522/NCV70522 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. The AMIS?30522/NCV70522 contains a current?translation table. It 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.

Features

? Dual H?Bridge for 2 Phase Stepper Motors

? Programmable Peak?Current up to 1.2 A Continuous (1.5 A Short

Time), Using a 5?Bit Current DAC

? On?Chip Current Translator

? SPI Interface

? Speed and Load?Angle Output

? 7 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

? Digital IO’s Compatible with 5 V and 3.3 V Microcontrollers

? Integrated 5 V Voltage Regulator to Supply an External

Microcontroller

? Integrated Reset Function to Reset External Microcontroller

? Integrated Watchdog Function

? NCV Prefix for Automotive and Other Applications Requiring Site

and Control Changes

? These are Pb?Free Devices*