Crocus Technology new contactless, coreless current sensors CT4051 and CT4052 which immunity to external magnetic field disturbance

时间： 2024-01-29 来源：Crocus Technology

Crocus Technology has expanded its contactless current sensing product offering with two new contactless, coreless current sensors CT4051 and CT4052. These Contactless Sensors that measure current via the magnetic field generated by flowing current, are coreless (with no ferromagnetic core), non-intrusive (they don’t cut the current path), and differential (in the case of CT4052), which enables immunity to external magnetic field disturbance.

The CT405x line up completes the current CT45x contactless current sensor lineup from Crocus Technology. Leveraging ten years of deep XtremeSense® TMR R&D. They are available to all markets — especially high volume and price sensitive ones that were stuck with low performance, legacy Hall sensors. (Figure 1)

Contactless CT4051 and CT4052 deliver a much better device solution than typical hall sensors, with better performance and cost basis. (Figure 2)

CT4051 and CT4052

Each new sensor is designed for specific requirements.

CT4051 is designed to measure uniform magnetic fields, while the CT4052 is a differential sensor, measuring differential fields.

While the CT4051 can be used with practically any busbar (as it simply picks up the magnetic field generated by flowing current), the CT4052 requires an S-shaped busbar to generate the differential magnetic field shape necessary for its immunity to external magnetic fields.

The CT4051 is ideal when high resolution is necessary, as a straight busbar will typically generate a higher amplitude magnetic field per 1 Amp (i.e. higher coupling coefficient). Conversely, the CT4052 requires an S-shaped busbar, which enables external magnetic field immunity, but has a negative impact on the coupling coefficient.

This is also the reason the CT4051’s magnetic range can go up to 26mT, as it has to allow for higher coupling coefficients so it doesn’t saturate too quickly. Conversely the CT4052’s lower magnetic range up to 4mT, is due to the lower coupling coefficient of its S-shaped busbar configuration.

A look at the features:

Supports AC & DC magnetic fields

Measurement range ±4 mT to ±26.0 mT

Ratiometric analog output

Factory-trimmed sensitivity and quiescent output voltage • 3.3V to 5V single supply operation

Immunity to common mode fields (only on CT4052)

DC to 500 kHz Bandwidth

Max. Total Error: ±3% FS (-40 ̊C to 125 ̊C)

7mA current draw

Operating Temperature: -40°C to +125°C

As you can see in figure 4, the features of each sensor affect their performance in terms of sensitivity, signal-to -noise ratio, cross-talk, etc. In this table we also see CT4051 and CT4052’s superior SNR performance, better resolution, and less noise compared to Hall sensor solutions.

Applications

When the powerful performance of these contactless sensors is targeted at high- volume, cost-constrained segments, the applications are numerous. (figure 5)

Contactless CT4051 and CT4052 deliver an ideal device solution for high volume, lower cost automotive and industrial market applications (optimal when nominal current is >100A.)

This includes applications like High Voltage Traction Inverters (HVTI) and Solar and Power inverters.

The CT4051 and CT4052 deliver accuracy specifications of less than 3% over the full temperature range and a high bandwidth specification of 500kHz, since they are contactless sensors designed for specific applications. For example, an automotivinverter application typically requires 100kHz to 200kHz capable sensors, so the CT4051/2 500kHz bandwidth specification is sufficient.

And both new sensors have distinct advantages: To meet automotive HVN (harshness vibration and noise) requirements, CT4051 is suitable as it is less sensitive to mechanical displacement, while CT4052’s benefit is its immunity to magnetic field changes.

The Crocus Technology Sensor Portfolio

These new contactless, coreless, differential sensors complete Crocus technology’s comprehensive portfolio of contactless TMR Current Sensors (figure 6). With the CT4051 and CT4052, high performance is available at every price point.

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Company Profile Isolated Current Sensors Supercharge Sensor Technology XtremeSense TMR

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CROCUS TECHNOLOGY - CONTACTLESS CURRENT SENSOR,高带宽低噪声集成非接触式电流传感器,非接触式电流传感器,HIGH BANDWIDTH AND LOW NOISE INTEGRATED CONTACTLESS CURRENT SENSOR,CTD450-06B,CT450-A12DRSN08,CT450-H12MRTS08,CT450-H24DRTS08,CTD450-24B,CT450-X12DR,CT450-H12DRTS08,CT450-H06DRTS08,CT450-X06MR,CT450-H06MRTS08,CT450-A24DRSN08,CTD450-06U,CT450-A06DRSN08,CT450-H24MRTS08,CT450-X24DR,CT450-A06MRSN08,CTD450-12B,CT450-A12MRTS08,CT450-X08DR,CT450-H12MRSN08,CTD450-12U,CT450,CTD450-24U,CT450-H24MRSN08,CT450-A24MRSN08,CT450-H12DRSN08,CT450-H06DRSN08,CT450-A12DRTS08,CT450-X12MR,CT450-X24MR,CT450-A24MRTS08,CT450-A06DRTS08,CT450-A12MRSN08,CT450-A24DRTS08,CT450-TFRXYPCKG,CT450-H06MRSN08,CT450-A06MRTS08,CT450-H24DRSN08,POWER CONDITIONER,BATTERY MANAGEMENT SYSTEMS,电力公用事业仪表,太阳能/电力逆变器,SOLAR/POWER INVERTERS,INDUSTRIAL EQUIPMENT,DC/DC CONVERTERS,功率调节器,工业设备,DC/DC转换器,POWER UTILITY METERS,电池管理系统

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CROCUS TECHNOLOGY - PROGRAMMABLE SENSORS,高带宽低噪声集成非接触式电流传感器,高DV/DT优化的XTREMESENSE®TMR无铁芯电流传感器,可编程传感器,HIGH BANDWIDTH AND LOW NOISE INTEGRATED CONTACTLESS CURRENT SENSOR,FACTORY CALIBRATED SENSORS,工厂校准传感器,HIGH DV/DT OPTIMIZED XTREMESENSE® TMR CORELESS CURRENT SENSOR,CT455-A24U5-TS08,CT455-A06U5-TS08,CT455-A00B3-TS08,CT455-A48B5-TS08,CT455-A24B5-TS08,CT455-A12U5-TS08,CT455-A24B3-TS08,CT455,CT455-A00B5-SN08,CT455-A06B3-TS08,CT455-A00U5-TS08,CT455-A12B3-TS08,CTD455-PT-06B3,CT455-TFRXV-PKG,CTD455-PT-06B5,CT455-A48B5-SN08,CT455-A06U3-TS08,CT455-A12B5-TS08,CT455-A24U3-TS08,CTD455-BB-06B5,CT455-A12U3-TS08,CTD455-BB-06B3,CT455-A00U3-TS08,CT455-A00B5-TS08,CT455-A06B5-TS08,POWER CONDITIONER,电力公用事业仪表,INDUSTRIAL EQUIPMENT,DC/DC CONVERTERS,功率调节器,DC/DC转换器,电池管理系统,POWER INVERTERS,BATTERY MANAGEMENT SYSTEMS,SOLAR INVERTERS,太阳能逆变器,工业设备,功率逆变器,POWER UTILITY METERS

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2023/9/21 - 数据手册 - Rev. 0.1

CT456高DV/DT优化的XtremeSense®TMR差分、无铁芯电流传感器，具有可编程增益

CROCUS TECHNOLOGY - 高DV/DT优化的XTREMESENSE®TMR差分、无铁芯电流传感器,高带宽低噪声集成零损耗非接触电流传感器,HIGH DV/DT OPTIMIZED XTREMESENSE® TMR DIFFERENTIAL, CORELESS CURRENT SENSOR,HIGH BANDWIDTH AND LOW NOISE INTEGRATED ZERO-LOSS CONTACTLESS CURRENT SENSOR,CT456-A00U5-TS08,CT456-A06U3-TS08,CT456-A06B3-TS08,CTD456-BB-06B5,CTD456-BB-06B3,CT456-TFRXV-PKG,CT456-A00U3-TS08,CT456-A06B5-TS08,CT456-A00B5-TS08,CT456,CTD456-PT-06B3,CT456-A06U5-TS08,CTD456-PT-06B5,CT456-A00B3-TS08,POWER CONDITIONER,电力公用事业仪表,INDUSTRIAL EQUIPMENT,DC/DC CONVERTERS,功率调节器,DC/DC转换器,电池管理系统,POWER INVERTERS,BATTERY MANAGEMENT SYSTEMS,SOLAR INVERTERS,太阳能逆变器,工业设备,功率逆变器,POWER UTILITY METERS

2023/8/1 - 数据手册 - Rev. 1.1 查看更多版本

Crocus Technology TMR Sensors such as CT430/1 Have the Most Reliable and Efficient Performance in Overcurrent Protection

For the most reliable and efficient over current protection, TMR Sensors deliver faster response time, better temperature stability, and lower power consumption than eFuse or the other OCP solutions.CT430/1 isolated current sensors feature fast response with a 1MHz bandwidth and 300ns response time.

2023-03-11 - 原厂动态

CT4051 XtremeSense®TMR非接触式电流，具有500kHz带宽和可编程增益和偏移

CROCUS TECHNOLOGY - EVALUATION BOARD,评估板,TMR SENSOR,CONTACTLESS XTREMESENSE® TMR BASED CURRENT SENSOR,SENSOR,传感器,TMR传感器,基于非接触式XTREMESENSE®TMR的电流传感器,CT4051-H26BTS8,CT4051,CT4051-H04BTS8,CT4051-H00BTS8,CTD4051-26B,电机控制,MOTOR CONTROL,开关模式电源,电信电源,消费电子,TELECOM POWER SUPPLIES,企业电子,ENTERPRISE ELECTRONICS,CURRENT MONITORING,POWER INVERTERS,TRACTION INVERTER,CONSUMER ELECTRONICS,过电流故障保护,不间断电源,电流监测,UPS,SMPS,功率逆变器,牵引逆变器,OVER-CURRENT FAULT PROTECTION

2023/9/21 - 数据手册 - Rev. 0.2

Crocus Technology Launched CT452/3 1MHz Bandwidth Contactless Current Sensor with Common Mode Field Rejection and ＜1% Total Error

The CT452 (5V) and CT453 (3.3V) are high bandwidth and low noise integrated zero-loss contactless current sensors that use Crocus Technology’s patented XtremeSense® TMR technology to enable high accuracy current measurements for many consumer, enterprise, and industrial applications.

2022-10-17 - 新产品