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有刷直流 (BDC) 电机驱动器

LMD18245

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3A，55V DMOS 全桥电机驱动器

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数据表

LMD18245

正在供货
数据表 立即订购

产品详情

Number of full bridges 1 Vs (min) (V) 12 Peak output current (A) 6 RDS(ON) (HS + LS) (mΩ) 300 Control mode PWM Control interface Hardware (GPIO) Features Current sense Amplifier Rating Catalog Operating temperature range (°C) -40 to 125
Number of full bridges 1 Vs (min) (V) 12 Peak output current (A) 6 RDS(ON) (HS + LS) (mΩ) 300 Control mode PWM Control interface Hardware (GPIO) Features Current sense Amplifier Rating Catalog Operating temperature range (°C) -40 to 125
TO-220 (NDL) 15 191.6915 mm² 20.02 x 9.575
  • DMOS Power Stage Rated at 55V and 3A Continuous
  • Low RDS(ON) of Typically 0.3Ω per Power Switch
  • Internal Clamp Diodes
  • Low-loss Current Sensing Method
  • Digital or Analog Control of Motor Current
  • TTL and CMOS Compatible Inputs
  • Thermal Shutdown (Outputs Off) at TJ = 155°C
  • Overcurrent Protection
  • No Shoot-Through Currents
  • 15-lead Package

All trademarks are the property of their respective owners.

  • DMOS Power Stage Rated at 55V and 3A Continuous
  • Low RDS(ON) of Typically 0.3Ω per Power Switch
  • Internal Clamp Diodes
  • Low-loss Current Sensing Method
  • Digital or Analog Control of Motor Current
  • TTL and CMOS Compatible Inputs
  • Thermal Shutdown (Outputs Off) at TJ = 155°C
  • Overcurrent Protection
  • No Shoot-Through Currents
  • 15-lead Package

All trademarks are the property of their respective owners.

The LMD18245 full-bridge power amplifier incorporates all the circuit blocks required to drive and control current in a brushed type DC motor or one phase of a bipolar stepper motor. The multi-technology process used to build the device combines bipolar and CMOS control and protection circuitry with DMOS power switches on the same monolithic structure. The LMD18245 controls the motor current via a fixed off-time chopper technique.

An all DMOS H-bridge power stage delivers continuous output currents up to 3A (6A peak) at supply voltages up to 55V. The DMOS power switches feature low RDS(ON) for high efficiency, and a diode intrinsic to the DMOS body structure eliminates the discrete diodes typically required to clamp bipolar power stages.

An innovative current sensing method eliminates the power loss associated with a sense resistor in series with the motor. A four-bit digital-to-analog converter (DAC) provides a digital path for controlling the motor current, and, by extension, simplifies implementation of full, half and microstep stepper motor drives. For higher resolution applications, an external DAC can be used.

The LMD18245 full-bridge power amplifier incorporates all the circuit blocks required to drive and control current in a brushed type DC motor or one phase of a bipolar stepper motor. The multi-technology process used to build the device combines bipolar and CMOS control and protection circuitry with DMOS power switches on the same monolithic structure. The LMD18245 controls the motor current via a fixed off-time chopper technique.

An all DMOS H-bridge power stage delivers continuous output currents up to 3A (6A peak) at supply voltages up to 55V. The DMOS power switches feature low RDS(ON) for high efficiency, and a diode intrinsic to the DMOS body structure eliminates the discrete diodes typically required to clamp bipolar power stages.

An innovative current sensing method eliminates the power loss associated with a sense resistor in series with the motor. A four-bit digital-to-analog converter (DAC) provides a digital path for controlling the motor current, and, by extension, simplifies implementation of full, half and microstep stepper motor drives. For higher resolution applications, an external DAC can be used.
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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 LMD18245 3A, 55V DMOS Full-Bridge Motor Driver 数据表 (Rev. E) 2013年 4月 9日
应用手册 集成电流感测的优势 (Rev. B) PDF | HTML 下载英文版本 (Rev.B) PDF | HTML 2022年 10月 12日
白皮书 How smart tune regulates current in stepper motors (Rev. A) 2019年 3月 19日
技术文章 Why are you still driving automotive motors with relays? 2017年 7月 13日
技术文章 The story of motor-drive integration 2017年 1月 9日
技术文章 How to create a dynamic power solution for stepper motors, relays and LEDs 2016年 11月 1日
技术文章 How to avoid motor and system overvoltage using AVS technology without external components 2016年 10月 14日

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封装 引脚数 下载
TO-220 (NDL) 15 了解详情
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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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