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Texas Instruments DRV8234 2A H-Bridge Motor Driver

Texas Instruments DRV8234 2A H-Bridge Motor Driver comes with integrated speed and position detection using ripple counting and additional features like motor speed and voltage regulation, stall detection, current sense output, current regulation, and protection circuitry. The integrated ripple counting algorithm counts the number of ripples in the motor current to determine motor relative position and speed, eliminating the potential need for encoders, hall sensors, or optical sensors. This feature in the Texas Instruments DRV8234 reduces board space and design complexity and saves on overall system cost. Integrated speed regulation maintains constant motor speed over varying input supply voltages, minimizing current consumption and saving power over time. This feature is critical in applications that have different loading conditions or rely on battery power for operation where the input voltage is not constant. Soft-start and stop allow for a controlled turn-on and turn-off time, reducing large inrush currents to protect the motor windings from damage, thereby increasing system reliability and longevity.

Features

  • N-channel H-bridge brushed DC motor driver
  • 4.5V to 38V operating supply voltage range
  • Ripple counting feature for
    • On-chip speed and position detection
    • Integrated voltage and speed regulation
  • Soft-start and stop feature for inrush current protection
  • 600mΩ RDS(on) (high-side + low-side)
  • High output current capability of 3.7A Peak, 2A RMS
  • PWM with I2C control interface
    • Configuration and diagnostics on I2C registers
    • Multi-follower operation support
    • Supports standard and fast I2C mode
  • Supports 3.3V, and 5V logic inputs
  • Integrated current sensing and current regulation
  • Analog current sense output (IPROPI)
  • Internal charge pump with 100% duty cycle
  • Long battery life with low-power sleep mode
    • < 1µA maximum sleep current
  • Small package and footprint
    • 16-Pin WQFN with PowerPAD™, 3mm×3mm
  • Integrated protection features
    • VM undervoltage lockout (UVLO)
    • Overcurrent protection (OCP)
    • Thermal shutdown (TSD)
    • Stall detection
    • Overvoltage protection (OVP)

Applications

  • Printers
  • Vacuum robots
  • Washers and dryers
  • Coffee machines
  • POS printers
  • Electronic hospital bed and bed control
  • Fitness machine

Simplified Schematic

Schematic - Texas Instruments DRV8234 2A H-Bridge Motor Driver

Texas Instruments DRV8234 2A H-Bridge Motor Driver