關于 Allegro
Allegro MicroSystems 公司在電源和霍爾效應傳感器集成電路的開發、制造及營銷領域潮流。Allegro 的解決方案服務于汽車市場中的高應用,此外也開發辦公自動化、工業和消費/通訊解決方案。Allegro 公司總部位于美國馬薩諸塞州伍斯特市,在世界各地擁有設計、應用和銷售支持 中心。
Allegro 主要為電動機控制、調節及磁場感測應用開發集成電路解決方案。我們提供高度集成的混合信號 IC，不元件數量日益增多，功能也更加強大。Allegro 系列產品是標準的“即插即用”型產品，在產品類別及縱深方面皆出類拔萃。
市場的霍爾效應傳感器 IC 制造商，為汽車市場提供廣泛的解決方案組合。
定制的封裝解決方案融合了磁路，可簡化應用問題
系統單晶片電源 IC，可合并多項電源驅動器、調節器以及控制邏輯功能
獲得的 BCD (Bi-polar、CMOS、DMOS) 和 BiCMOS 晶片處理技術可實現密集的數字電路與電源及/或磁感測結構的結合
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
- all 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. Tical 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 tically 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: 帶 100 μΩ電流導體的增強散熱功能、全集成、基于霍爾效應的線性電流傳感器 IC
Allegro?ACS758 電流傳感器 IC 系列可為交流或直流電測提供經濟實惠且的解決方案。典型應用包括電動機控制、載荷檢測和管理、電源和直流至直流轉換器控制、逆變器控制和過電流故障檢測。
該器件由一個、低偏移的線性霍爾傳感器電路組成，且其銅制的電流路徑靠近晶片。通過該銅制電流路徑施加的電流能夠生成可被集成霍爾 IC 感應并轉化為成比例電壓的磁場。通過將磁性信號靠近霍爾傳感器，實現器件度優化。的、成比例輸出電壓由穩定斬波型低偏置 BiCMOS 霍爾 IC 提供，該 IC 出廠時已進行度編程。
Allegro 的集成屏幕技術提供的對電流導體 dV/dt 信號和雜散電場的高耐受力，高端、高電壓應用中的低輸出電壓紋波和低偏置漂移。
當通過用作電測通路之主要銅傳導通路（從端子 4 到端子 5）的電流不斷上升時，器件的輸出具有正斜率 (>VCC/2) 。該傳導通路的內電阻通常是 100 μΩ，具有較低的功率損耗。
銅線的厚度允許器件在高過電流條件下運行。傳導通路的接線端與傳感器引腳（引腳 1 到 3）電氣緣。這樣，ACS758 傳感器 IC 系列可用于那些要求電氣緣卻未使用光電緣器或其它昂貴緣技術的應用。
器件在出廠裝運前已校準。ACS758 系列是無鉛產品。的引腳均鍍以 100% 霧錫，封裝內鉛存在。大量規引腳框是以無氧銅制造。
