Texas Instruments DRV8251 4.1A Brushed DC Motor Driver

Texas Instruments DRV8251 4.1A Brushed DC Motor Driver is an integrated motor driver with N-channel H-bridge, charge pump, current regulation, and protection circuitry. The charge pump improves efficiency by supporting N-channel MOSFET half-bridges and 100% duty cycle driving. The DRV8251 implements a current regulation feature by comparing the analog input V_REF 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 internal circuitry. Internal protection features include supply undervoltage lockout, output overcurrent, and device overtemperature. The Texas Instruments DRV8251 is part of a family of devices that comes in pin-to-pin, scalable R_DS(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 48V operating supply voltage range
• Pin-to-pin, R_DS(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: 4.1A Peak
• PWM control interface.
• Supports 1.8V, 3.3V, and 5V logic inputs
• Integrated current regulation
• Low-power sleep mode
  • <1µA at V_VM = 24V, T_J = 25°C
• Small package and footprint
• 8-Pin HSOP with PowerPAD™, 4.9mm × 6.0mm
• Integrated protection features
  • VM undervoltage lockout (UVLO)
  • Latched overcurrent protection (OCP)
  • Thermal shutdown (TSD)

Block Diagram

more information: https://www.ti.com/product/DRV8251

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