Microstepping motor driver

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Overview

The AMIS-30532 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. It has an on-chip voltage regulator, reset-output and watchdog reset, able to supply peripheral devices. The AMIS-30532 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-30532 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-30532 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.

  • Dual H-Bridge for 2-phase stepper motors
  • Programmable peak-current up to 1.6 A continuous (3.0 A short time) 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 5 V and 3.3 V microcontrollers
  • Integrated 5 V regulator to supply external microcontroller
  • Integrated reset function to reset external microcontroller
  • Integrated Watchdog Function

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VM Min (V)

VM Max (V)

VCC Min (V)

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Reference Price

AMIS30532C5321RG

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CAD Model

Pb

A

H

P

NQFP-32

3

260

REEL

2500

N

6

40

4.5

5.5

3.2

3.2

1/32

SPI

Fully Integrated

Over-Current

Price N/A

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