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L9942 Datasheet Integrated Stepper Motor Driver

Manufacturer: STMicroelectronics

Overview: L9942 Integrated stepper motor driver for bipolar stepper motors with microstepping and programmable current.

General Description

The L9942 is an integrated stepper motor driver for bipolar stepper motors with microstepping and programmable current profile look-up-table to allow a flexible adaptation of the stepper motor characteristics and intended operating conditions.

It is possible to use different current profiles depending on target criteria: audible noise, vibrations, rotation speed or torque.

The decay mode used in PWM-current control circuit can be programmed to slow-, fast-, mixed-and autodecay.

Key Features

  • Two full bridges for max. 1.3 A load (RDSON = 500 mī—).
  • Programmable current waveform with look-up table: 9 entries with 5 bit resolution.
  • Current regulation by integrated PWM controller and internal current sensing.
  • Programmable stepping mode: full, half, mini and microstepping.
  • Programmable slew rate for EMC and power dissipation optimization.
  • Programmable Fast-, Slow-, Mixed- and AutoDecay Mode.
  • Full-scale current programmable with 3 bit resolution.
  • Pro.

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L9942 Distributor