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Texas Instruments DRV8231 33V H-Bridge Driver

Texas Instruments DRV8231 33V H-Bridge Driver is an integrated motor driver with N-channel H-bridge, charge pump, current sense feedback, current regulation, and protection circuitry. The charge pump improves efficiency by supporting N-channel MOSFET half-bridges and 100% duty cycle driving.

The DRV8231 implements a current regulation feature by comparing the analog input VREF and the voltage across a current-sense shunt resistor on the ISEN pin. The ability to limit current can significantly reduce large currents during motor startup and stall conditions.

A low-power sleep mode achieves ultra-low quiescent current draw by shutting down most of the internal circuitry. Internal protection features include supply undervoltage lockout, output overcurrent, and device overtemperature. The Texas Instruments DRV8231 is part of a family of devices that come in pin-to-pin, scalable RDS(on), and supply voltage options to support various loads and supply rails with minimal design changes.

Features

  • N-channel H-bridge brushed DC motor driver
  • 4.5V to 33V operating supply voltage range
  • Pin-to-pin, RDS(on), voltage, and current sense/regulation variants (external shunt resistor and integrated current mirror)
    • DRV8870: 6.5V to 45V, 565mΩ, shunt
    • DRV8251: 4.5V to 48V, 450mΩ, shunt
    • DRV8251A: 4.5V to 48V, 450mΩ, mirror
    • DRV8231: 4.5V to 33V, 600mΩ, shunt
    • DRV8231A: 4.5V to 33V, 600mΩ, mirror
  • High output current capability: 3.7A Peak
  • PWM control interface
  • Supports 1.8V, 3.3V, and 5V logic inputs
  • Integrated current regulation
  • Low-power sleep mode
    • <1µA at VVM = 24V, TJ = 25°C
  • Small package and footprint
    • 8-Pin WSON with PowerPAD™, 2.0mm × 2.0mm
    • 8-Pin HSOP with PowerPAD™, 4.9mm × 6.0mm
  • Integrated protection features
    • VM undervoltage lockout (UVLO)
    • Auto-retry overcurrent protection (OCP)
    • Thermal shutdown (TSD)

Applications

  • Printers
  • Vacuum robot
  • Washer and dryer
  • Coffee machine
  • POS printer
  • Electricity meter
  • ATMs (Automated Teller Machines)
  • Ventilators
  • Surgical equipment
  • Electronic hospital bed and bed control
  • Fitness machine

Functional Block Diagram

Block Diagram - Texas Instruments DRV8231 33V H-Bridge Driver

Texas Instruments DRV8231 33V H-Bridge Driver