Motor Drivers, Stepper | AMIS-30512

Microstepping motor driver

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The AMIS-30512 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-30512 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 uses a proprietary PWM algorithm for reliable current control.
The AMIS-30512 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-30512 is ideally suited for general purpose stepper motor applications in the automotive, industrial, medical, and marine environment.

  • Pan, tilt, zoom motor control
  • Integrated, local control mounted to motors
  • Flaps and valves in building and process
  • Positioning
  • Security cameras
  • Smart motors (integrated drivers)
  • Sewing machines
  • Building automation
  • Pick-and-place, office equipment
  • Dual H-bridge for 2-phase stepper motors
  • Programmable peak-current up to 800 mA 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 3.3 V microcontrollers, 5.0 V tolerant inputs
  • Integrated 5.0 V regulator to supply external microcontroller
  • Integrated reset function to reset external microcontroller
  • Integrated watchdog function

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AMIS30512C5122RG

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CAD Model

Pb

A

H

P

SOIC-24

751AW

2

260

REEL

1500

N

6

40

4.75

5.25

0.8

0.8

1/32

SPI

Fully Integrated

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