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A3979 - Microstepping DMOS Driver

General Description

The A3979 is a complete microstepping motor driver with built-in translator, designed as a pin-compatible replacement for the successful A3977, with enhanced microstepping (1/16 step) precision.

Key Features

  • ±2.5 A, 35 V output rating.
  • Low RDS(On) outputs: 0.28 Ω source, 0.22 Ω sink, typical.
  • Automatic current decay mode detection/selection.
  • 3.0 to 5.5 V logic supply voltage range.
  • Slow, Fast or Mixed current decay modes.
  • Home output.
  • Synchronous rectification for low power dissipation.
  • Internal UVLO and thermal shutdown circuitry.
  • Crossover-current protection.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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A3979 Microstepping DMOS Driver with Translator FEATURES AND BENEFITS ▪ ±2.5 A, 35 V output rating ▪ Low RDS(On) outputs: 0.28 Ω source, 0.22 Ω sink, typical ▪ Automatic current decay mode detection/selection ▪ 3.0 to 5.5 V logic supply voltage range ▪ Slow, Fast or Mixed current decay modes ▪ Home output ▪ Synchronous rectification for low power dissipation ▪ Internal UVLO and thermal shutdown circuitry ▪ Crossover-current protection PACKAGE: 28 lead TSSOP (suffix LP) with exposed thermal pad Not to scale DESCRIPTION The A3979 is a complete microstepping motor driver with built-in translator, designed as a pin-compatible replacement for the successful A3977, with enhanced microstepping (1/16 step) precision.