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AMIS-30521

AMI SEMICONDUCTOR
Part Number AMIS-30521
Manufacturer AMI SEMICONDUCTOR
Description Micro-stepping Motor Driver
Published Nov 4, 2009
Detailed Description AMIS-30521 Micro-stepping Motor Driver Data Sheet 1.0 Introduction The AMIS-30521 is a micro-stepping stepper motor dr...
Datasheet PDF File AMIS-30521 PDF File

AMIS-30521
AMIS-30521

Overview
AMIS-30521 Micro-stepping Motor Driver Data Sheet 1.
0 Introduction The AMIS-30521 is a micro-stepping stepper motor driver for bipolar stepper motors.
The chip is connected through I/O pins and an SPI interface with an external microcontroller.
The AMIS-30521 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-30521 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-30521 is ideally suited for general-purpose stepper motor applications in the automotive, industrial, medical, and marine environment.
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 www.
DataSheet4U.
com 3.
0 Ordering information Table 1: Ordering Information Part No.
AMIS-30521 ANA Package NQFP-32 (7 x 7mm) Peak Current 1600mA Temp.
Range -40°C….
.
125°C Ordering Code Tubes 0C521-001-XTD Ordering Code Tapes 0C521-001-XTP AMI Semiconductor – June 2007, M-20683-001 www.
amis.
com 1 AMIS-30521 Micro-stepping Motor Driver Data Sheet 4.
0 Block Diagram VDD CPN CPP VCP VBB CLK Time...


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