FAQ - CZ3A 系列

直流电和交流电都可以测量吗?

[Q0463]

回答

直流电和交流电都可以测量。

最大有效电流和输出不饱和范围的区别是什么?

[Q0515]

回答

最大有效电流展示的是可以长时间施加到电流传感器的电流值,该值取决于一次导体的断面面积。如果直流电流或交流电流的实效值长时间超过最大实效值状态下使用使用电流传感器,那么将会损坏电流传感器。
如果是脉冲电流,超过最大有效电流也可以通电使用。输出不饱和范围是确保电流传感器输出线性度的电流范围。
如果电流值超出输出饱和范围则输出将饱和,但是当电流值返回到输出饱和范围内时,它将返回正常输出。

电流的实效电流值可以施加到多少A?

[Q0516]

回答

CZ-3AXX可以承载到50Arm的有效电流。

是否也可以检测单极?(例如。我想要检测0-21A的电流)

[Q0517]

回答

CZ-3AXX无法检测单极。请考虑一下CZ-372X系列。

电流的分辨率是多少?

[Q0518]

回答

电流分辨率取决于输出噪声电压。 此外,可以通过滤波器降低输出噪声电压,并且可以通过滤波器特性来改善电流分辨率。

一次导体电阻是否有温度特性?

[Q0519]

回答

CZ-3AXX的一次导体拥有图1所示的温度特性。

一次导体的电阻值得偏差有多少?

[Q0520]

回答

CZ-3AXX在25℃时的一次导体电阻为0.21 ~ 0.30mΩ (参考值)。

一次导体得电感值是多大?

[Q0521]

回答

CZ-3AXX的一次倒塌的电感值在25℃时约为3nh (参考值)。

Non-ratiometric特性是什么样的?

[Q0522]

回答

Non-ratiometric特性是电流灵敏度和零电流电压在不依赖于电源电压的情况下,保持恒定值的特性。即使在电源电压不稳定的环境中,也可以无误差的正确检测到电流值。

响应时间是多少?

[Q0524]

回答

CZ3A0xx的响应时间为1μs (Typ.),CZ3AGx的响应时间为3.6us (Typ.)。 (当负载容量为1000pF时)
图4 是CZ-3A0x、图5是 CZ-3AGx显的典型脉冲响应波形。 (左图:上升响应,下图:下降响应)

从输出完全饱和状态恢复到复位电压所需时间是多少?

[Q0525]

回答

图5显示了N = 1时的瞬态响应波形。输出从完全饱和状态恢复到复位电压状态大约所需的时间为2.5μs。

在电流传感器输出端连接一个1000pF以上输出负载电容时,会发生什么样的状况?

[Q0526]

回答

输出会发生震荡,无法获得正确的输出值。

如果给电流传感器输出端施加一个+/-2mA以上得输出电流负载时会发什么?

[Q0527]

回答

无法获取正确的输出值。

有磁滞吗?

[Q0528]

回答

没有,因为我们没有使用磁性材料。

是否有遵守安全标准?

[Q0529]

回答

・CZ-3Axx已从国际认证机构获得IEC / UL-62368,UL-1577认证。
・IEC/UL 62368-1, 2nd Ed, 2014-12-01 (Audio/video, information and communication technology equipment Part 1: Safety requirements) (FileNo.E359197)
・CAN/CSA C22.2 No. 62368-1-14, 2nd Ed- (Audio/video, information and communication technology equipment Part 1: Safety requirements) (FileNo.E359197)
・UL1577-Optical Isolators-Edition 5.(File No. E499004)
・CSA Component Acceptance Service No. 5A-Component Acceptance Service for Optocouplers and Related Devices (File No. E499004)

一次,2次间的爬电距离和电器间隙是多少?

[Q0530]

回答

爬电距离和电气间隙均为8.0mm以上。

封装的CTI值是多少?

[Q0531]

回答

CTI值为600V (PLC = 0)。

Working Voltage是多少V?

[Q0532]

回答

CZ-3Axx系列电流传感器可以在下记条件下使用。

可以超过规格书规定的绝缘耐压值使用吗?

[Q0533]

回答

我们无法保证在超过绝缘强度条件下使用的传感器特性。请在推荐条件下使用。

高频电源电压抑制比是多少?

[Q0534]

回答

给被测电流径路中输入高频正弦波电压噪声,通过测量传感器输出可以计算出高频电源电压抑制比。
如表4所示,CZ-3AXX系列具有较高的高频电源电压抑制比。

RC常数是多少?

[Q0535]

回答

在确定RC常数时,必须要考虑所需的分辨率和响应特性。

应该如何将其安装在基板上?

[Q0536]

回答

请参考注意事项中的焊接条件。

有推荐的焊盘图案吗?

[Q0537]

回答

图7显示的是AKM推荐的焊盘图案。

担心大电流通电时的发热情况,请告知使用条件。

[Q0541]

回答

CZ-3Axx可以在50 Arms连续通电,瞬时施加电流值可以更大。在符合安全标准的条件下使用时,由于测量电流会产生的热量,所以不要超过Tc = 130℃。有关封装表面温度Tc的测量位置,请参见图8。
从散热的角度出发,建议在一次导体的焊盘部分上设计Pad on Via 。可以在不扩大布线空间的情况下将待测电流从板的内层传递到外层,并且可以连接到电流传感器的一次导体,有望减少热量的产生。

ESD容许值是多少?

[Q0542]

回答

人体模型(HBM)在2000V以上,而机器模型(MM)在200V以上(均为参考值)。

想知道实际使用环境是否有超过传感器的温度规格,是否有对温度的估算方法?

[Q0544]

回答

因为一次导体的引线框温度和传感器温度接近,所以可以通过一次导体的引线框温度来估算。

温度变化对特性的影响是有多大?

[Q0545]

回答

下图显示当环境温度从-40°C变为85°C时的特性变化。
图11显示了电流灵敏度的温度漂移,
图12显示了零电流电压的温度漂移,
图13显示了总精度的温度特性。
该图展示的是某批次实际测量结果的“平均值”和“平均值±3σ”。 * 1

* 1请注意,上图中的平均值(Ave)定义与数据表的标准值不同,如下所示
平均值=某批次实际测量结果的“平均值”
标准值=某批次实测结果的“平均值±1σ”

一次导体被施加的电压,电流突然变化时,对其的输出影响有多大?

[Q0546]

回答

 

对应无卤素吗?

[Q0547]

回答

对应无卤素。

对应无铅吗?

[Q0548]

回答

对应无铅。

引线框(一次导体)是由什么制成的?

[Q0549]

回答

引线框的材料是铜。

封装热阻有多少℃/W?

[Q0550]

回答

CZ-3Axx的热阻θja为32℃/ W。

内部EEPROM是可以使用的吗?

[Q0551]

回答

很抱歉,内部EEPROM无法使用。
一般是在我们公司内部对EEPROM进行调整后出货。

能做定制产品吗?

[Q0552]

回答

可根据数量和需求内容进行商讨,请联系我们。

有此产品的推荐使用方法吗?

[Q0553]

回答

CZ-3Axx在规格书的14.可靠性试验 记载的可靠性实验合格判定基准内,其零电流电压会有变动的可能性。因此,为了提高零电流电压的测量精度,建议给使用电流传感器系统加电时,在被测电流为0A状态下,使用软件校准零电流电压。

与其他磁性零部件一起使用时,有什么注意事项吗?

[Q0554]

回答

如果附近有其他磁性组件(如机械继电器和变压器),CZ-3Axx则可能会受到影响。如果出于布局考虑必须将磁性部件放置在较近的位置,请在使用前确保不影响电流灵敏度等特性。

CZ3AXX符合RoHs吗?

[Q0601]

回答

对应RoHs。

过电流检测功能是什么?

[Q0602]

回答

当超过过电流检测阈值(可以设置为所需值)的过电流流入一次导体时,从OCD端子输出数字型过电流检测信号(正常动作时为“ H”,过电流检测时为“ L”)。

FAQ - CZ3A Series

CZ3Axx

[Q0463]
・Is it possible to sense both DC current and AC current?
A.
・It is possible to sense both DC current and AC current.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0515]
・What is the difference between maximum primary current and linear sensing range?
A.
・Maximum primary current indicates the current value which can be flown for a long time in a current sensor and depends on the cross-sectional area of the primary conductor.
CZ-3Axx can be damaged when it has been used for a long time over the maximum effective current value. If current flows at a short period within msec order, such as an over current, CZ-3Axx will not be damaged.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0516]
・How much current can be flown in CZ-3Axx?
A.
・It is possible to flow current of up to 50Arms(maximum primary current)  in CZ-3Axx.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0517]
・Can CZ-3Axx detect unipolar current? (ex. Current detection of 0 to 21A)
A.
・CZ-3Axx can not detect only unipolar current. In that case, please consider CZ-372x.
Click here for details
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0518]
・How much current resolution can the CZ-3Axx achieve?
A.
・Output noise affects the resolution of the measured current. It is possible to reduce the output noise by filter, and to increase the resolution depending on the filter characteristic.
Figure 1. External Circuits Example
Figure 1. External Circuits Example
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0519]
・How big is the primary conductor resistance temperature drift of CZ-3Axx?
A.
・The primary conductor resistance temperature drift of CZ-3Axx is shown in Figure 2.
Figure 2. CZ-3Axx Temperature Drift of the Primary Conductor Resistance  (normalized at 25℃)
Figure 2. CZ-3Axx Temperature Drift of the Primary Conductor Resistance (normalized at 25℃)
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0520]
・How big is the production tolerance in primary conductor resistance?
A.
・The production tolerance in primary conductor resistance is from 0.21 to 0.30mΩ at 25°C(reference value) .
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0521]
・How big is the primary conductor inductance?
A.
・The Primary Conductor Inductance of CZ-3Axx is about 3nH (reference) at 25°C.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0522]
・What does "non-ratiometric" mean?
A.
・This means that the output of the current sensor(Sensitivity and Zero-current voltage) is constant, even if the supply power voltage changed.  CZ-3Axx can detect without error , under the condition the supply power voltage is not stable.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0523]
・How fast is the power-on time ?
A.
・Figure 3. shows a recommended example of the power up sequence.
In the power up sequence of CZ-3A0x, if the time from VDD=2.75V to VDD=3.3V is less than 0.87msec, the output will be stabilized after 0.87msec(typ.) from the time VDD=2.75V. If it takes 0.87msec or more, it may take longer to stabilize the output.
In the power up sequence of CZ-3AGx, if the time from VDD=2.75V to VDD=5.0V is less than 0.79msec, the output will be stabilized after 0.79msec(typ.) from the time VDD=2.75V. If it takes 0.79msec or more, it may take longer to stabilize the output.
Please check the time needed to stabilize the output in that case.
Figure 3. Recommended example of the power up sequence
Figure 3. Recommended example of the power up sequence
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0524]
・How fast is the response time?
A.
・The response time of the CZ-3Axx is typically 1μs with 1000pF load capacitance. Figure 4 and  Figure 5 shows the pulse response waveform(N=1).
Figure 4. Rise response waveform (left), fall response waveform (right). CZ-3A04(Vh=48mV/A), Input current =25A.
Figure 4. Rise response waveform (left), fall response waveform (right). CZ-3A04(Vh=48mV/A), Input current =25A.
Figure 5. Rise response waveform (left), fall response waveform (right). CZ-3AG4(Vh=48mV/A), Input current =25A.
Figure 5. Rise response waveform (left), fall response waveform (right). CZ-3AG4(Vh=48mV/A), Input current =25A.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0525]
・What is the recovery time from a fully saturated output?
A.
・Figure 5 shows the transient response waveform of CZ-3Axx(N=1). The time from saturation to normal is about 2.5μs.
Figure 5. The CZ-3Axx Transient Response Waveform from the VOUT Deep Saturation. Test conditions:for saturation, IIN=25A; for linear VOUT, IIN=0A.
Figure 5. The CZ-3Axx Transient Response Waveform from the VOUT Deep Saturation. Test conditions:for saturation, IIN=25A; for linear VOUT, IIN=0A.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0526]
・What happens if a load capacitance over 1000pF is inserted to the CZ-3Axx VOUT?
A.
・CZ-3Axx does not output the correct value because of the oscillation of output.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0527]
・What happens if a load current over +/-2mA is applied to CZ-3Axx VOUT?
A.
・The CZ-3Axx does not output the correct value. Please use under the recommended operating conditions.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0528]
・Does CZ-3Axx show magnetic hysteresis?
A.
・No, because CZ-3Axx does not contain magnetic material.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0529]
・What safety standards CZ-3Axx have?
A.
・The CZ-3Axx has been certified with IEC/UL-62368 and UL-1577 by the international certification association.

・IEC/UL 62368-1, 2nd Ed, 2014-12-01 (Audio/video, information and communication technology equipment Part 1: Safety requirements) (File No. E359197)
・CAN/CSA C22.2 No. 62368-1-14, 2nd Ed-(Audio/video, information and communication technology equipment Part 1: Safety requirements) (File No. E359197)
・UL1577-Optical Isolators-Edition 5.(File No. E499004)
・CSA Component Acceptance Service No. 5A-Component Acceptance Service for Optocouplers and Related Devices (File No. E499004)
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0530]
・What is the clearance distance and the creepage distance?
A.
・The clearance distance and the creepage distance are both over 8.0mm.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0531]
・What is the CTI of the package?
A.
・The Comparative Tracking Index (CTI) of the CZ-3Axx package resin is 600V. The Material Group is I.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0532]
・How much is the working voltage of CZ-3Axx?
A.
・CZ-3Axx can be used under the following conditions.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0533]
・Is it allowable to use this device over the rating isolation voltage of the data-sheet?
A.
・No, it cannot be used under the conditions that exceed the isolation voltage. We cannot guarantee characteristics of the CZ-3Axx. The device should be used under the recommended condition.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0534]
・What is the voltage noise rejection ratio?
A.
・The voltage noise rejection ratio of the primary conductor is calculated by measuring the output while a high frequency sine wave voltage is applied as the input noise to the primary conductor.
Table 4 shows the CZ-3Axx series having a good voltage noise rejection ratio.
Figure 6. shows the frequency dependency of the voltage noise rejection ratio.
Table 4. Voltage Noise Rejection Ratio when high frequency sine wave voltage
Table 4. Voltage Noise Rejection Ratio when high frequency sine wave voltage
Figure 6. CZ-3Axx Noise Frequency vs Voltage Noise Rejection Ratio
Figure 6. CZ-3Axx Noise Frequency vs Voltage Noise Rejection Ratio
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0535]
・How do I decide the time constant value RC ?
A.
・Please decide the time constant value considering the requirement of output resolution and response time (Please refer to [Q0518]).
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0536]
・How should I solder the CZ-3Axx to the board?
A.
・Please refer to "Soldering condition" described in Important notices page.
Click here for details
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0537]
・Can I get the recommended land pattern?
A.
・Yes. The recommended land pattern is shown in Figure 7 & Table 5.
Figure 7. CZ-3Axx recommended land pattern
Figure 7. CZ-3Axx recommended land pattern
Table 5. CZ-3Axx recommended land pattern dimensions
Table 5. CZ-3Axx recommended land pattern dimensions
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0538]
・Can I get the board layout guidelines of CZ-3Axx?
A.
・Please see the application notes (2. Board Design Guidelines) here.
Click here for details
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0539]
・Can I get the gerber file of the evaluation board?
A.
・Yes, please download from: Gerber Files.
Click here for details
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0540]
・Can I get the recommended circuit diagram to use the CZ-3Axx?
A.
・In this subsection, we show two examples of the external circuit when using CZ-3Axx. These are just examples and there are other possible circuits. Please evaluate your external circuit by yourself. 

Case1) Connecting a 3V A/D converter in the subsequent stage
Case2) Connecting an amplifier to change the reference voltage of the output or to change the sensitivity

Case1) CZ-3Axx+ADC(3V)
(a)0.1μF bypass capacitor should be placed close to VDD and VSS pins of CZ-3Axx.
(b)Add a low-pass filter to the VOUT pins if necessary. The R1 and C1 values should befixed in consideration of the time constant of the filter and load conditions.
(c)3.3V should be applied in case of CZ-3A0x. 5V should be applied in case of CZ-3AGx.

Case2) CZ-3Axx+Amplifier
(a)0.1μF bypass capacitor should be placed close to VDD and VSS pins of CZ-3Axx.
(b)R1 and R2 are resistors that decides the gain. The R0 value should be fixed inconsideration of the load condition. The R1 and R2 values should be fixed in consideration of the gain.
(c)3.3V should be applied in case of CZ-3A0x. 5V should be applied in case of CZ-3AGx.
Figure 8. External Circuit Example
Figure 8. External Circuit Example
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0541]
・Can I get the recommended condition to use CZ-3Axx considering less heat generation?
A.
・It is possible to flow current up to 50Arms(maximum primary current) in CZ-3Axx, even larger current in case of transitional. When the CZ-3Axx is used under conditions compliant with the safety standard, please make sure the case temperature (Tc) does not exeed 130℃ due to heat generated by primary current. Please refer to the Figure 9. for the position to measure Tc. 
If the heat dissipation is not enough, using pad on vias may help. They can suppress heat generation without increasing the trace area, by thermally connecting the primary conductors to an inner or outer thermal layer directly.
Figure 9. Position to measure package case temperature
Figure 9. Position to measure package case temperature
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0542]
・How big ESD does CZ-3Axx endure?
A.
・CZ-3Axx has the ESD tolerance which is more than 2000V at human body model (HBM) and more than 200V at machine model (MM). (Both are reference values.)
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0543]
・What should I take care of the other current lines(stray magnetic field)?
A.
・There are two Hall elements inside CZ-3Axx connected in a differential manner. By detecting the difference of these two Hall elements’ outputs, CZ-3Axx reduces the effects of stray magnetic fields as a built-in common-mode rejection function. When the same magnetic field is applied to both Hall elements, this magnetic field is deemed to be the stray and is reduced from the output of CZ-3Axx by the ratio of Stray Magnetic Field Reduction (Ebc: 0.01A/mT Typ.).

Example: When a stray magnetic field of 1mT is applied to the CZ-3Axx, the output will have additional error of 0.01A=10mA equivalent.
-CZ-3A01: Sensitivity=120mV/A, Error=10mA → Output error=1.2mV
-CZ-3A07: Sensitivity=12mV/A, Error=10mA → Output error=0.12mV

On the other hand, when different magnetic fields are applied to each Hall element, this will appear as output error.
For example, a current carrying trace that runs close the CZ-3Axx may cause this. The extent of the error will depend on the layout of the current trace, actual current, distance from the CZ-3Axx, and the part number (sensitivity). Figure 11 shows some simulated examples of output error by the nearby current.
Figure 10. Examples of nearby current lines
Figure 10. Examples of nearby current lines
Figure 11. Output Error by nearby current
Figure 11. Output Error by nearby current
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0544]
・Can I get a way to estimate the temperature inside CZ-3Axx?
A.
・The temperature of the primary current lead frame and the sensor inside the package are almost the same, the best estimated temperature would be of the primary current lead frame.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0545]
・How much effect does CZ-3Axx have on the electrical characteristics with respect to temperature drift?
A.
・The graphs below show the change in characteristics when the ambient temperature is changed from -40 ° C to 85 ° C.
Figure 12 shows temperature drift of sensitivity, Figure 13 shows temperature drift of zero-current output, and Figure 14 shows total accuracy.
All graphs show “Average” and “Average ±3σ” of the actual result in a certain lot.
Figure12. Temperature Drift of Sensitibity  (left), Figure 14. Temperature dependency of Total Accuracy  (right)
Figure12. Temperature Drift of Sensitibity (left), Figure 14. Temperature dependency of Total Accuracy (right)
Figure 13. Temperature Drift of Zero-current Output
Figure 13. Temperature Drift of Zero-current Output
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0546]
・What kind of impact does CZ-3Axx's output have, when the sudden step voltage or the sudden pulse current are applied to the primary current pins?(dV/dt, dI/dt)
A.
・Figure 15. shows the dV/dt noise property of CZ-3Axx output voltage (VOUT), when 1kV is applied to the primary conductor at the rise time of 1μs. The yellow line shows the input voltage waveform and the green line shows the output voltage waveform. The convergence time of CZ-3A0x is as short as 2μs. The convergence time of CZ-3AGx is as short as 3μs. Please avoid this noise by adjusting the capture timing.

Figure 16(a). shows the output voltage (VOUT) of CZ-3A0x, when a 10A pulse is applied to the primary conductor with a pulse width of 1μs.
Figure 16(b). shows the output voltage (VOUT) of CZ-3AGx, when a 10A pulse is applied to the primary conductor with a pulse width of 2μs.
The yellow line shows the input current waveform and the green line shows the output voltage waveform.
The convergence time of CZ-3A0x is as short as 2μs.
The convergence time of CZ-3AGx is as short as 3μs.
Figure 15. dV/dt noise waveform (left: rise waveform, right: fall waveform)
Figure 15. dV/dt noise waveform (left: rise waveform, right: fall waveform)
Figure 16. dI/dt noise waveform
Figure 16. dI/dt noise waveform
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0547]
・Is CZ-3Axx halogen-free?
A.
・CZ-3Axx is halogen-free.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0548]
・Are CZ-3Axx Pb-free?
A.
・CZ-3Axx are Pb-free.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0549]
・What is the primary conductor made from?
A.
・The primary conductor is made from copper.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0550]
・What is the thermal resistance of the package?
A.
・The thermal resistance (θja) of CZ-3Axx is 32°C/W when using the board shown in Figure 17.
Table 5. Thermal Resistance measurement board
Table 5. Thermal Resistance measurement board
Figure 17. Thermal Resistance measurement board
Figure 17. Thermal Resistance measurement board
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0551]
・Is it possible to use the internal EEPROM?
A.
・Sorry, internal EEPROM is not available.
Products will be shipped after the adjustment of EEPROM at factory test.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0552]
・Is it possible to order the customized products?
A.
・It is possible to provide the customized product, depending on quantity conditions and your requirement. Please contact us.
Click here for details
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0553]
・Can I get the recommended way to use the CZ-3Axx?
A.
・The Zero-Current Output of the CZ-3Axx may drift over time within the values defined in datasheet Section 14.
Therefore, in order to minimize this drift, we recommend calibrating the Zero-Current Output by software after the power-up time of the system when the measured current is zero.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0554]
・Can I get the recommended way to use the CZ-3Axx nearby the stray magnetic field components?
A.
・The CZ-3Axx output can be affected by devices including magnetic materials(mechanical relays, transformers, etc.)  nearby.
In the case those devices must be placed close to the CZ-3Axx, please check the effect on the CZ-3Axx current sensitivity or other characteristics. And please make sure that any bad characteristics are understood, and that your system does not have any critical effects.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0601]
・Is CZ-3Axx compliant with RoHS?
A.
・CZ-3Axx is compliant with RoHS.
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0602]
・What is the overcurrent detection function?
A.
・When the primary current exceeds overcurrent detection threshold which you can set, OCD pin outputs an overcurrent detection digital signal. (Normal output: "H", Over current detection: "L")
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0603]
・How do I use the overcurrent detection function?
A.
・Please see application note Appendix.
Click here for details
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.
[Q0604]
・How fast is the response time of overcurrent detection output?
A.
・Table 6 shows the  response time of overcurrent detection output of CZ-3A0x.  Table 7 shows the  response time of overcurrent detection output of CZ-3AGx.
Table 6.  Response time of overcurrent detection output of CZ-3A0x
Table 6. Response time of overcurrent detection output of CZ-3A0x
Table 7.  Response time of overcurrent detection output of CZ-3AGx
Table 7. Response time of overcurrent detection output of CZ-3AGx
Was it helpful?
Yes
No
Thank you We will reflect your opinion on the improvement of the web content.