产品详细信息

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) (mOhms) 450 Sleep current (uA) 1 Control mode PWM Control interface Hardware (GPIO) Features Current Regulation, Integrated Current Sensing, Low-Power Sleep Mode 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) (mOhms) 450 Sleep current (uA) 1 Control mode PWM Control interface Hardware (GPIO) Features Current Regulation, Integrated Current Sensing, Low-Power Sleep Mode Rating Catalog Operating temperature range (C) -40 to 150
HSOIC (DDA) 8 19 mm² 4.9 x 3.9
  • 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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技术文档

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类型 项目标题 下载最新的英语版本 日期
* 数据表 DRV8251A 4.1-A Brushed DC Motor Driver with Integrated Current Sense and Regulation 数据表 PDF | HTML 21 Aug 2020
证书 DRV8251AEVM EU RoHS Declaration of Comformity (DoC) 09 Nov 2021
用户指南 DRV8251 Evaluation Module User's Guide 25 May 2021
技术文章 Using brushed motors to improve battery life and reliability in vacuum robots 17 Jul 2019
技术文章 Why are you still driving automotive motors with relays? 13 Jul 2017
技术文章 The story of motor-drive integration 09 Jan 2017
技术文章 How to create a dynamic power solution for stepper motors, relays and LEDs 01 Nov 2016
应用手册 所选封装材料的热学和电学性质 16 Oct 2008

设计和开发

如需其他信息或资源,请查看下方列表,点击标题即可进入详情页面。

评估板

DRV8251AEVM — DRV8251A 电机驱动器评估模块

DRV8251A 评估模块 (EVM) 可轻松评估 DRV8251A 器件。该 EVM 已被编程并配置为开箱即用,可用于立即开始旋转电机。

DRV8251A 是一款额定电压为 4.5V 至 48V 的单 H 桥驱动器,能够驱动高达 3.7A 的电流。该 EVM 可轻松控制 DRV8251A,无需使用 GUI。该 EVM 配备了两个电位计,可用于调节控制信号占空比。如果需要,可断开板载 MCU,以便 DRV8251A 可由外部控制器控制。

用户指南: PDF
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封装 引脚数 下载
SO PowerPAD (DDA) 8 了解详情

订购和质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 认证摘要
  • 持续可靠性监测

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