Stepper motor driver/controller for external FETs

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Overview

The AMIS-30422 is a micro-stepping stepper motor bridge controller for large current range bipolar applications. The chip interfaces via a SPI interface with an external controller in order to control two external power NMOS H-bridges. It has an on-chip voltage regulator, current sensing, self adapting PWM controller and pre-driver with smart slope control switching allowing the part to be EMC compliant with industrial and automotive applications. It uses a proprietary PWM algorithm for reliable current control.

  • Motor control
  • HVAC
  • Industrial control systems
  • Dual H-bridge pre-drivers for two phase stepper motors
  • Programmable current via SPI
  • On-chip current translator
  • SPI interface
  • Speed and load angle output
  • 9 step modes from full step up to 128 microsteps
  • Current sense via two external sense resistors
  • PWM current control with automatic selection of fast and slow decay
  • Low EMC PWM with selectable voltage slopes
  • Full output protection and diagnosis
  • Thermal warning and shutdown
  • Compatible with 3.3 V microcontrollers
  • Integrated 3.3 V regulator to supply external microcontroller
  • Integrated reset function to reset external microcontroller
  • Integrated watchdog function

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CAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

VM Min (V)

VM Max (V)

VCC Min (V)

VCC Max (V)

IO Max (A)

IO Peak Max (A)

Step Resolution

Control Type

Current Sense

Fault Detection

Reference Price

AMIS30422C422MNTWG

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Last Shipments

CAD Model

Pb

A

H

P

QFN-48

3

260

REEL

2500

N

6

40

3

3.6

15

20

1/128

SPI

External Resistor

Thermal

Price N/A

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