AMIS-30522 Datasheet, PDF (1/29 Pages) AMI SEMICONDUCTOR – Micro-stepping Motor Driver

1.0 Introduction
AMIS-30522
Micro-Stepping Motor Driver
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 Number
Package
AMIS30522C5222G NQFP-32 (7 x 7mm)
AMIS30522C5222RG NQFP-32 (7 x 7mm)
Shipping Configuration
Tube/Tray
Tape & Reel
Temperature Range
-40°C to125°C
-40°C to 125°C
Device/Family Specific #1
1600mA
1600mA
©2008 SCILLC. All rights reserved.
June 2008 – Rev. 2
Publication Order Number:
AMIS30522/D