关于 Allegro

Allegro MicroSystems 公司在高性能电源和霍尔效应传感器集成电路的开发、制造及营销领域始终引领潮流。Allegro 独具创新的解决方案服务于汽车市场中的高增长应用,此外也开发办公自动化、工业和消费/通讯解决方案。Allegro 公司总部位于美国马萨诸塞州伍斯特市,在世界各地拥有设计、应用和销售支持 中心。

Allegro 主要为电动机控制、调节及磁场感测应用开发集成电路解决方案。我们提供高度集成的混合信号 IC，不仅元件数量日益增多，功能也更加强大。Allegro 系列产品是标准的“即插即用”型产品，在产品类别及纵深方面皆出类拔萃。

市场的霍尔效应传感器 IC 制造商，为汽车市场提供广泛的创新解决方案组合。
定制的封装解决方案融合了磁路，可简化应用问题
系统单晶片电源 IC，可合并多项电源驱动器、调节器以及控制逻辑功能
获得的 BCD (Bi-polar、CMOS、DMOS) 和 BiCMOS 晶片处理技术可实现密集的数字电路与电源及/或磁感测结构的结合

Features and Benefits

• Monolithic Hall IC for high reliability
• Single +5 V supply
• 3 kVRMS isolation voltage between terminals 4/5 and pins 1/2/3 for up to 1 minute
• 35 kHz bandwidth
• Automotive temperature range
• End-of-line factory-trimmed for gain and offset
• Ultra-low power loss: 100 μΩ internal conductor resistance
• Ratiometric output from supply voltage
• Extremely stable output offset voltage
• Small package size, with easy mounting capability
• Output proportional to AC and DC currents

Description

The Allegro ACS75x family of current sensor ICs provides economical and precise solutions for current sensing in industrial, automotive, commercial, and communications systems. The device package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, power supplies, and overcurrent fault protection.

The device consists of a precision, low-offset linear Hall sensor circuit with a copper conduction path located near the die. Applied current flowing through this copper conduction path generates a magnetic field which is sensed by the integrated Hall IC and converted into a proportional voltage. Device accuracy is optimized through the close proximity of the magnetic signal to the Hall transducer. A precise, proportional voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy at the factory.

The output of the device has a positive slope (>VCC / 2) when an increasing current flows through the primary copper conduction path (from terminal 4 to terminal 5), which is the path used for current sensing. The internal resistance of this conductive path is typically 100 μΩ, providing low power loss. The thickness of the copper conductor allows survival of the device at up to 5× overcurrent conditions. The terminals of the conductive path are electrically isolated from the sensor leads (pins 1 through 3). This allows the ACS75x family of sensor ICs to be used in applications requiring electrical isolation without the use of opto-isolators or other costly isolation techniques.

The device is fully calibrated prior to shipment from the factory. The ACS75x family is lead (Pb) free. All pins are coated with 100% matte tin, and there is no lead inside the package. The heavy gauge leadframe is made of oxygen-free copper.

ACS758: 带 100 μΩ电流导体的增强散热功能、全集成、基于霍尔效应的线性电流传感器 IC

Allegro^?ACS758 电流传感器 IC 系列可为交流或直流电流感测提供经济实惠且的解决方案。典型应用包括电动机控制、载荷检测和管理、电源和直流至直流转换器控制、逆变器控制和过电流故障检测。

该器件由一个、低偏移的线性霍尔传感器电路组成，且其铜制的电流路径靠近晶片。通过该铜制电流路径施加的电流能够生成可被集成霍尔 IC 感应并转化为成比例电压的磁场。通过将磁性信号靠近霍尔传感器，实现器件度优化。的、成比例输出电压由稳定斩波型低偏置 BiCMOS 霍尔 IC 提供，该 IC 出厂时已进行度编程。

Allegro 独有的集成屏幕技术提供的对电流导体 dV/dt 信号和杂散电场的高耐受力，确保高端、高电压应用中的低输出电压纹波和低偏置漂移。

当通过用作电流感测通路之主要铜传导通路（从端子 4 到端子 5）的电流不断上升时，器件的输出具有正斜率 (>V_CC/2) 。该传导通路的内电阻通常是 100  μΩ，具有较低的功率损耗。

铜线的厚度允许器件在高过电流条件下运行。传导通路的接线端与传感器引脚（引脚 1 到 3）电气绝缘。这样，ACS758 传感器 IC 系列可用于那些要求电气绝缘却未使用光电绝缘器或其它昂贵绝缘技术的应用。

器件在出厂装运前已完全校准。ACS758 系列是无铅产品。所有的引脚均镀以 100% 雾锡，封装内无任何铅存在。大量规引脚框是以无氧铜制造。