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L6474 Datasheet Fully integrated microstepping motor driver

Manufacturer: STMicroelectronics

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General Description

The L6474 device, realized in analog mixed signal technology, integrates a dual low RDS(on) DMOS full bridge with all power switches equipped with an accurate on-chip current sensing circuitry suitable for non-dissipative current control and overcurrent protections.

Thanks to a new current control, a 1/16 microstepping is achieved through an adaptive decay mode which outperforms traditional implementations.

All data registers, including those used to set analogue values (i.e.: current control value, current protection trip point, deadtime, etc.) are sent through a standard 5 Mbit/s SPI.

Overview

L6474 Fully integrated microstepping motor driver Datasheet - production data Applications  Bipolar stepper motor POWERSO36.

Key Features

  • Operating voltage: 8 - 45 V.
  • 7.0 A output peak current (3.0 A r. m. s. ).
  • Low RDS(on) power MOSFETs.
  • Programmable power MOS slew rate.
  • Up to 1/16 microstepping.
  • Current control with adaptive decay.
  • Non-dissipative current sensing.
  • SPI interface.
  • Low quiescent and standby currents.
  • Programmable non-dissipative overcurrent protection on all power MOS.
  • Two-level overtemperature protection.

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