Only TMR Current Sensors Can Enable Efficient Industrial and Automotive Applications
Today, a wide variety of industrial and automotive applications are demanding higher efficiency which impacts many design decisions including the current sensing requirements. The demands are so dramatic that it may be that existing magnetic-based solutions will be obsolete by 2030. These applications demand wide band gap (WBG) power devices pushing the performance requirements for current sensing.
As EE Times notes, “WBG SiC and GaN materials enable significant efficiency improvements in applications such as traction inverters for SiC and adapters/ chargers for GaN. SiC and GaN technologies have grown enormously over the past few years, proving to be commercially available energy-saving technologies.”
WBG materials deliver smaller, faster, more reliable power electronic components with higher efficiency than their silicon-based counterparts. EVs, renewables, and power efficiency in general (including server power supplies, automotive onboard charges, solar inverters, etc.) all require accurate, high bandwidth current sensors.
The new requirements for current measurement, conversion optimization, and power-factor correction mean that this type of new, better performing, more efficient technology is essential. Today’s Hall based solutions simply can’t cut it. While Hall based solutions are faltering, TMR is just getting started, already surpassing Hall in performance with first generation products. It’s the classic technology S-curve, with Hall tapering off of at the top of the curve, while TMR is just ramping upwards.
Power Electronics News points out that “TMR technology has advantages over both shunt resistors and hall effect-based sensing solutions, offering lower power consumption, better thermal stability, better resolution, and higher sensitivity.
The Future is TMR
The demand for higher sensitivity in industrial applications will most likely lead to a replacement of Hall effect sensors by GMR or TMR sensors, which in turn will have to become more affordable. – IOPscience Scientific Paper
For a new technology to take over an established one, it must offer dramatically better performance and efficiency. When it comes to new requirements for industrial applications, TMR delivers in spades.
TMR sensors are a good choice for applications where high bandwidth, high accuracy, and lifetime performance are important. TMR sensors are now generally available and boast significantly better Signal-to-Noise Ratio (SNR) than Hall-effect sensors. In addition, Crocus’ TMR sensor solutions are BEOL-compatible. This means that its TMR sensors can be manufactured using the same equipment and processes that are used to manufacture other semiconductor devices, reducing the cost of production. Unlike Hall, Crocus TMR does not require any space on the silicon substrate, it lives in the BEOL layers, allowing for a bigger sensing area while achieving a smaller overall die size.
TMR sensors’ higher SNR, means they can detect small changes in the magnetic field. They also have a wider dynamic range, which means they can measure magnetic fields with high resolution. This sensitivity, paired with exceptional Signal-to-Noise Ratio, offer unmatched contactless sensing performance – not an option with Hall solutions. These sensors are also more stable over temperature, which means they can provide more accurate measurements in harsh environments, such as automotive.
Sensor accuracy is substantially affected by Common Mode Field Rejection (CMFR), In current sensing modules, stray magnetic fields can be induced by adjacent current carrying conductors or magnets. These magnetic fields impact the sensor performance and lead to lower system inefficiencies. To solve this, Crocus TMR solutions offer vastly superior common-mode field rejection capability reaching up to -54dB both in contact and contactless current sensor products.
Using standard CMOS manufacturing, test and packaging along with smaller die size and improvements in test times, Crocus Technology’s TMR products have closed the cost gap with Hall based sensors all while offering superior performance.
Crocus Technology’s CT43x and CT45x, for example, are very well suited for EV applications with proven success, offering high bandwidth (1MHz) without the need for magnetic flux concentrators. They also provide high accuracy, overcurrent fault detection, and immunity to Common Mode Fields – CMFR: -54dB.
As an example, recently Suncall Corporation realized these advantages and employed Crocus TMR Sensors for a new lineup of electric vehicle products based on a magnetic sensors. This new current sensor achieves high accuracy of 1.0% or less over the entire temperature range and low power consumption of 6mA or less, making it more efficient than conventional products.
Crocus Technology is a TMR manufacturer whose products have decisively demonstrated technically superiority at competitive pricing. High end applications need superior performance that is delivered by TMR solutions and the performance exhibited by Crocus TMR solutions will be the standard required for future applications.
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本文由洛希转载自Crocus Technology News，原文标题为:Only TMR Current Sensors can enable Efficient Industrial and Automotive Applications，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。
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新型TMR传感器可测量50mA至2000A的电流，磁增强半导体技术开发商授权世强先进代理
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描述- 本文探讨了传统分流式传感器与隧道磁阻式（TMR）传感器的对比。随着精度要求的提高，传统分流式传感器在成本效益上逐渐失去优势。TMR传感器因其内置隔离、更少的组件和更简单的供应链响应，提供了更安全、更精确的解决方案。文章还比较了霍尔效应传感器与分流式传感器的优缺点，指出TMR传感器在低功耗、高信号噪声比、更好的线性度和无需额外磁通集中器结构方面具有显著优势。
全球领先的TMR技术开发者——Crocus Technology
Crocus Technology作为TMR技术的全球领导技术开发者，专注于TMR技术的研究开发，授予超过300项专利，超过450个专利备案。和全球顶尖的晶圆厂、封测厂合作，为全球领先的工业，汽车和消费企业提供最先进的隧道磁阻（TMR）传感器技术方案的供应商，为客户在磁场定位和电流检测的应用市场中贡献顶尖的技术和商务服务。
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描述- TDK提供全面的传感器产品线，包括温度、压力、角度和电流传感器。资料详细介绍了TDK的磁传感器和电机控制器，包括霍尔传感器、TMR传感器、电流传感器和嵌入式电机控制器。资料还涵盖了这些传感器在不同应用中的使用，如汽车、工业和家用电器。重点介绍了霍尔效应传感器和TMR传感器的原理和应用，以及它们在汽车行业中的重要性。
型号- HVC 42/44 PRODUCT FAMILY,HAL 18 PRODUCT FAMILY,HAL 3737,HAL 24XY,HAC 373X,HAL 39 PRODUCT FAMILY,HAL 3735,HAL 371X,CUR 42 PRODUCT FAMILY,HAL 3970,HAC 372X,TAS4140,HAL 39XY,HAL 1566,HAL 372X,HAL 1565,HAL 24 PRODUCT FAMILY,HAL 3900,HVC 4422F,HAR 2455,HAC 371X,HAL 1564,HAL 1563,HAR 37XY,HAL 1562,HAL 3980,TAD 2140,HAL 1561,HAL 855,HAL 3715,HAC 3736,HAC 3735,HAL 856,HAC 3737,TAS 214X,HVC 4223F,CUR 4235,HAR 3795,CUR 42,TAB 4140,HAL 83X,HAR 3796,HAR 3797,HAR 3715,HAL 1890,HAL 3725,TAS4142,HAL 3726,HAL 3727,HAR 3727,HAC 3725,HAL 1002 SWITCH,HAC 3727,HAL 18,HAC 3726,HVC 4222F,HAL 8 PRODUCT FAMILY,HVC 42/44,HAC830,HAR 3725,HAR 3726,HAR 371X,HAL 830,HAL 1510,HAL 3930,HAL 15 SWITCH,HAL 835,CUR 4235GWDA,HAC 3715,TAS 414X,HAR 379X,HAL 1870,HAR 24XY,TAS2143,HAL 24,HAR 3736,TAS2141,HAR 3737,TAB4140,HAL 2440,HAR 3735,HAL 39,HAL 18XY,HAL 37,HAC 37XY,HAR 372X,HAL1002,HAL 37 PRODUCT FAMILY,HAL 37XY,TAS414X,TAX,TAX PRODUCT FAMILY,HAC 830,HAL 1880,HAL 1881,HAL 1882,HAL 2455,HAL 1883,HAL 1002,TAD2140,TAD2141,HVC 4XYZF,HAL 373X,HAR 373X,CUR 4235GWBA,HAL 2425,TAA6140,TAS214X,HAL 2420,HAL 2421,HAL 15 SWITCH FAMILY,HAR 2425,HAL 8,HAL 1502,HAL 1501,HAL 1506,HAL 1505,HAL 15XY,HAL 1504,HAL 1503,HAL 1509,HAL 1508,HVC 4420F,HAL 1507,TAD4140
现货市场
服务
可自由定制铜排形状尺寸；检测精度：0.5%~1.0；电流测量范围 ±300-500A。低噪音 (0.27mVpp)；低磁力残余误差:2mV；响应性能<4μSec；支持RoHS指令 、AEC-Q200。
最小起订量： 100个 提交需求>
可定制分流器电阻范围20uΩ~100uΩ，可自由设计铜排形状尺寸，电镀：镀锡/镀镍。支持RoHS指令 、AEC-Q200。认证资格：IATF16949;ISO9001；检测精度：0.1%。
最小起订量： 100个 提交需求>
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