AMIS-30522 Datasheet, PDF (1/28 Pages) AMI SEMICONDUCTOR – Micro-stepping Motor Driver

AMIS-30522 Micro-stepping Motor Driver
Data Sheet
1.0 Introduction
The AMIS-30522 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-30522 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-30522 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-30522 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.
2.0 Key Features
• Dual H-Bridge for 2-phase stepper motors
• Programmable peak-current up to 1.6A 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 5V and 3.3V microcontrollers
• Integrated 5V regulator to supply external microcontroller
• Integrated reset function to reset external microcontroller
• Integrated watchdog function
3.0 Ordering information
Table 1: Ordering Information
Part No.
AMIS-30522 ANA
Package
NQFP-32 (7 x 7mm)
Peak Current
1600mA
Temp. Range
-40°C…..125°C
Ordering Code
Tubes
0C522-001-XTD
Ordering Code
Tapes
0C522-001-XTP
AMI Semiconductor – June 2007, M-20684-001
1
www.amis.com