Inicio Controladores para motores Drivers para motores de corriente continua con escobillas (BDC)
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Controladores para motores
Drivers para motores de corriente continua con escobillas (BDC)

DRV8251A

ACTIVO

Controlador de motor de puente en H de 50 V y 4.1 A con regulación de corriente y realimentación de

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DRV8251A

ACTIVO
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Detalles del producto

Number of full bridges 1 Vs (min) (V) 4.5 Vs ABS (max) (V) 50 Peak output current (A) 4.1 RDS(ON) (HS + LS) (mΩ) 450 Sleep current (µA) 1 Control mode PWM Control interface Hardware (GPIO) Features Current Regulation, Integrated Current Sensing, Low-Power Sleep Mode Topology Integrated FET Rating Catalog Operating temperature range (°C) -40 to 150
Number of full bridges 1 Vs (min) (V) 4.5 Vs ABS (max) (V) 50 Peak output current (A) 4.1 RDS(ON) (HS + LS) (mΩ) 450 Sleep current (µA) 1 Control mode PWM Control interface Hardware (GPIO) Features Current Regulation, Integrated Current Sensing, Low-Power Sleep Mode Topology Integrated FET Rating Catalog Operating temperature range (°C) -40 to 150
HSOIC (DDA) 8 29.4 mm² (4.9 mm × 6 mm)

  • N-channel H-bridge brushed DC motor driver

  • 4.5-V to 48-V operating supply voltage range

  • Pin-to-pin, RDS(on), voltage, and current sense/regulation variants (external shunt resistor and integrated current mirror)

    • DRV8870: 6.5-V to 45-V, 565-mΩ, shunt

    • DRV8251: 4.5-V to 48-V, 450-mΩ, shunt

    • DRV8251A: 4.5-V to 48-V, 450-mΩ, mirror

    • DRV8231: 4.5-V to 33-V, 600-mΩ, shunt

    • DRV8231A: 4.5-V to 33-V, 600-mΩ, mirror

  • High output current capability: 4.1-A Peak
  • PWM control interface
  • Supports 1.8-V, 3.3-V, and 5-V logic inputs
  • Integrated IPROPI current sensing for stall detection and current regulation
  • Low-power sleep mode
    • <1-µA at VVM = 24-V, TJ = 25°C
  • Small package and footprint
    • 8-Pin HSOP with PowerPAD™, 4.9 × 6.0 mm
  • Integrated protection features
    • VM undervoltage lockout (UVLO)
    • Auto-retry overcurrent protection (OCP)
    • Thermal shutdown (TSD)

  • N-channel H-bridge brushed DC motor driver

  • 4.5-V to 48-V operating supply voltage range

  • Pin-to-pin, RDS(on), voltage, and current sense/regulation variants (external shunt resistor and integrated current mirror)

    • DRV8870: 6.5-V to 45-V, 565-mΩ, shunt

    • DRV8251: 4.5-V to 48-V, 450-mΩ, shunt

    • DRV8251A: 4.5-V to 48-V, 450-mΩ, mirror

    • DRV8231: 4.5-V to 33-V, 600-mΩ, shunt

    • DRV8231A: 4.5-V to 33-V, 600-mΩ, mirror

  • High output current capability: 4.1-A Peak
  • PWM control interface
  • Supports 1.8-V, 3.3-V, and 5-V logic inputs
  • Integrated IPROPI current sensing for stall detection and current regulation
  • Low-power sleep mode
    • <1-µA at VVM = 24-V, TJ = 25°C
  • Small package and footprint
    • 8-Pin HSOP with PowerPAD™, 4.9 × 6.0 mm
  • Integrated protection features
    • VM undervoltage lockout (UVLO)
    • Auto-retry overcurrent protection (OCP)
    • Thermal shutdown (TSD)

The DRV8251A device 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.

An internal current mirror architecture on the IPROPI pin implements current sensing and regulation. This eliminates the need for a large power shunt resistor, saving board area and reducing system cost. The IPROPI current-sense output allows a microcontroller to detect motor stall or changes in load conditions. The external voltage reference pin, VREF, determines the threshold of current regulation during start-up and stall events without interaction from a microcontroller.

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 DRV8251A is part of a family of devices which come in pin-to-pin, scalable RDS(on) and supply voltage options to support various loads and supply rails with minimal design changes. See Section 5 for information on the devices in this family. View the full portfolio of brushed motor drivers on ti.com.

The DRV8251A device 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.

An internal current mirror architecture on the IPROPI pin implements current sensing and regulation. This eliminates the need for a large power shunt resistor, saving board area and reducing system cost. The IPROPI current-sense output allows a microcontroller to detect motor stall or changes in load conditions. The external voltage reference pin, VREF, determines the threshold of current regulation during start-up and stall events without interaction from a microcontroller.

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 DRV8251A is part of a family of devices which come in pin-to-pin, scalable RDS(on) and supply voltage options to support various loads and supply rails with minimal design changes. See Section 5 for information on the devices in this family. View the full portfolio of brushed motor drivers on ti.com.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos DRV8251A 4.1-A Brushed DC Motor Driver with Integrated Current Sense and Regulation datasheet PDF | HTML 21/08/2020
Certificado DRV8251AEVM EU RoHS Declaration of Comformity (DoC) 9/11/2021
Artículo técnico Using brushed motors to improve battery life and reliability in vacuum robots PDF | HTML 17/07/2019

Diseño y desarrollo

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Placa de evaluación

DRV8251AEVM — Módulo de evaluación de controlador de motor DRV8251A

El módulo de evaluación DRV8251A (EVM) permite una fácil evaluación del dispositivo DRV8251A. El módulo de evaluación (EVM) se programó y configuró para que funcionara desde el primer momento e hiciera arrancar los motores de inmediato.

El DRV8251A es un controlador de puente en H único con (...)

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