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A4985 - DMOS Microstepping Driver

General Description

The A4985 is a complete microstepping motor driver with built-in translator for easy operation.

It is designed to operate bipolar stepper motors in full-, half-, quarter-, and eighth-step modes.

Step modes are selectable by MSx logic inputs.

Key Features

  • Low RDS(ON) outputs.
  • Automatic current decay mode detection/selection.
  • Mixed and Slow current decay modes.
  • Synchronous rectification for low power dissipation.
  • Internal UVLO.
  • Crossover-current protection.
  • 3.3 and 5 V compatible logic supply.
  • Thin profile QFN and TSSOP packages.
  • Thermal shutdown circuitry.
  • Short-to-ground protection.
  • Shorted load protection.
  • Low current Sleep mode, < 10 µA.
  • No smoke no fire (NSNF) compliance (ET pa.

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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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A4985 DMOS Microstepping Driver with Translator and Overcurrent Protection FEATURES AND BENEFITS ▪ Low RDS(ON) outputs ▪ Automatic current decay mode detection/selection ▪ Mixed and Slow current decay modes ▪ Synchronous rectification for low power dissipation ▪ Internal UVLO ▪ Crossover-current protection ▪ 3.3 and 5 V compatible logic supply ▪ Thin profile QFN and TSSOP packages ▪ Thermal shutdown circuitry ▪ Short-to-ground protection ▪ Shorted load protection ▪ Low current Sleep mode, < 10 µA ▪ No smoke no fire (NSNF) compliance (ET package) PACKAGES: 24-contact QFN with exposed thermal pad 4 mm × 4 mm × 0.75 mm (ES package) 32-contact QFN with exposed thermal pad 5 mm × 5 mm × 0.