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A3959 - DMOS Full-Bridge PWM Motor Driver

General Description

Designed for pulse width modulated (PWM) current control of DC motors, the A3959 is capable of output currents to ±3 A and operating voltages to 50 V.

Key Features

  • ±3 A, 50 V Output Rating.
  • Low rDS(on) Outputs (270 mΩ, Typical).
  • Mixed, Fast, and Slow Current-Decay Modes.
  • Synchronous Rectification for Low Power Dissipation.
  • Internal UVLO and Thermal-Shutdown Circuitry.
  • Crossover-Current Protection.
  • Internal Oscillator for Digital PWM Timing.

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Full PDF Text Transcription for A3959 (Reference)

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A3959 DMOS Full-Bridge PWM Motor Driver FEATURES AND BENEFITS ▪ ±3 A, 50 V Output Rating ▪ Low rDS(on) Outputs (270 mΩ, Typical) ▪ Mixed, Fast, and Slow Current-Decay Mod...

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n) Outputs (270 mΩ, Typical) ▪ Mixed, Fast, and Slow Current-Decay Modes ▪ Synchronous Rectification for Low Power Dissipation ▪ Internal UVLO and Thermal-Shutdown Circuitry ▪ Crossover-Current Protection ▪ Internal Oscillator for Digital PWM Timing PACKAGES: Package LB, 24-pin SOIC with internally fused pins Package LP, 28-pin TSSOP with exposed thermal pad Not to scale DESCRIPTION Designed for pulse width modulated (PWM) current control of DC motors, the A3959 is capable of output currents to ±3 A and operating voltages to 50 V. Internal fixed off-time PWM current-control timing circuitry can be adjusted via control inpu