IM2000S Ver la hoja de datos (PDF) - Unspecified

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IM2000S

HIGH PERFORMANCE MICROSTEPPING STEP MOTOR CONTROLLER

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Section 1

Introduction to the IM2000S

Section Overview

This section will introduce the user to the feature set provided by the IM2000S Microsteping controller ASIC. The

following subsections are contained:

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The IM2000S Described

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Features and Benefits

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Block Diagram

The IM2000S

The IM2000S is a high performance microstepping step motor controller that

incorporates a sine/cosine signal generator, anti-resonance circuitry, PWM

current control and much more in one monolithic IC. The IM2000S combines

hardware intense functions together with innovative features to provide

designers with a powerful yet simple solution for their high volume OEM

products.

Never before has any motion product integrated all the digital control into one

monolithic IC. This high degree of integration can significantly reduce design

time as well as driver size.

Beyond the integration of a complete microstepping control system, the

IM2000S has unique features that give designers unprecedented control over

motor movement. These features include 14 selectable resolutions (in both

decimal and binary) that can be changed at any time without motor movement

interruption. There is no need to reset the controller. This allows the user to

rapidly move long distances, yet precisely position the motor at the end of

travel without the need or expense of a complex controller.

Figure 1.1: The IM2000S

(2.5 times actual size.)

Another valuable feature is an “On Full Step” output which indicates when the motor is at an electrical full step. This

output can be used to reduce the overhead needed to track position when making long moves.

The development of proprietary circuits has minimized ripple current, while maintaining a 20 KHz chopping rate. This

prevents additional motor heating that is common with drivers requiring higher chopping rates. Now low inductance

stepper motors can be used to improve high speed performance and peak system efficiency.

The IM2000S needs only clock and direction inputs to control the motor and will interface directly to discrete bridges or

common monolithic bridge ICs.

Designers can now place drivers directly on their PC boards with all the necessary control in the IM2000S chip’s ultra

small 64 pin QFP package.

Size, price and time-to-market are three crucial aspects in today’s competitive markets and the IM2000S offers the ability

to reduce all three.

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