成人高h I 亚洲成人婷婷 I 国产女教师bbwbbwbbw I 污网站免费看 I 91在线观看欧美日韩 I 西西人体大胆444www I 99精品视频在线播放免费 I 91大片在线观看 I 精品久久久久中文字幕日本 I 依依色影院 I 丁香婷婷无码不卡在线 I 精品人无码一区二区三区 I 久久久天堂国产精品女人 I 国产一区二区野外 I 成人依人 I 免费1级做爰片在线观看爱 I 秋霞午夜久久午夜精品 I 欧美国产视频一区二区 I 亚洲精品中文在线资源 I 精品亚洲二区 I 137日本免费肉体摄影 I 精品久久久久久中文字幕大豆网 I 男女激情视频一区 I 男人的天堂va I 欧美日韩干 I 欧美一区二区三区在线观看 I 亚洲第一免费网站 I 人摸人人人澡人人超碰97 I 欧美一级性生活视频 I 任你躁久久久久久妇女av I 国产在线免费视频 I 欧美另类孕交 I 美女福利写真视频 I 美女插插插网站 I 免费人成电影网站

Hotline: 0755-26888837
Contact

Shenzhen Mario tronics co.,Ltd


ADD:Shenzhen City, Qianhai Shenzhen Hong Kong cooperation to the former Bay Road No. 1 building 201 A

A-mail: 26888837@mariotro.com


Problems needing attention in the process of using tantalum capacitors

Source:未來電子    Author:Admin    Visit:2    Pubtime:2016-09-10 11:54:20

When the tantalum capacitor is installed on the PCB board, under the mechanical stress, when the tantalum capacitor installation is not at that time, it is easy to lead the lead to bear large stress or resonance.

 

The following should be taken into account when selecting and using a tantalum capacitor:

A) circuit designers in order to design a circuit that can be satisfied with the work within the time required, the capacity of the capacitor to be used must be considered. Dielectric absorption; capacitance and pressure, vibration and shock; capacitance in the circuit aging and storage conditions.

B) to take into account the capacitance between the terminal and the capacitor, if this capacitance will produce stray capacitance and leakage current.

C) can be used in combination with a variety of capacitors to obtain the required amount of capacitance, and thus the amount of compensation capacity - temperature characteristics, etc..

D) the peak voltage applied to the capacitor can not exceed the specified value of the corresponding specification. Usually, the same peak voltage may be decreased due to the following conditions: aging; temperature rise; medium voltage region increases; high frequency; moisture into the capacitor. One point to be stressed is that don't ignore the short term transient voltage in the application.

E) when the capacitor is higher than the ground potential under high pressure condition, and to adopt additional insulation insulation, a capacitor terminal connected to the shell, because the capacitance and voltage distribution depends on between the capacitor core and shell and the capacitance between the casing and the chassis.

F) the peak current of charge and discharge must be considered according to the time constant of the circuit.

G) must consider internal heat and ambient temperature.

H) must consider the influence of humidity, pressure, corrosion resistance, mold, vibration and shock and other environmental factors.

I) must consider the insulation resistance, especially in the high temperature insulation resistance.

J) when working in series in a DC circuit, a balanced resistor must be considered.

K) the effective inductance of a large capacitance capacitor can be reduced by a parallel capacitor.

L) because the capacitor has an inductance, it is possible to generate instantaneous oscillation in parallel in each work or instantaneous operation of the circuit.

Poor electrical contact in low voltage M may open or produce noise.

N) the energy stored in the capacitor is dangerous to people and equipment, and the appropriate precautions should be taken.

O) filled with liquid capacitors can not be inverted, because it will lead to internal corona.

P) non - air sealed capacitors may be affected by "breathing".

Tantalum capacitor dielectric oxide film has a unidirectional conductivity and rectification characteristics, when the reverse voltage is applied, there will be a lot of current through, and even cause a short circuit failure. Therefore, the reverse voltage should be strictly controlled in the application. Solid electrolyte tantalum capacitors are generally not allowed to add reverse voltage, and can not be used in pure AC circuit for a long time. If in no circumstances, allow the reverse voltage applied amount in a short period of time, its value is below 25 DEG C: less than 10%UR or 1V (for small) 85 degrees less than or equal to 5%UR or 0.5V (for small) 125 degrees less than or equal to 1%UR or 0.1V (for small). If the capacitor is used in a circuit with reverse voltage for a long time, the use of bipolar tantalum capacitors, but also can only be in the polarity of the DC or pulse circuit frequency is not too high.

Non solid electrolyte tantalum capacitors are in the factory before the test, there is no problem of welding, the machine does not need to pre processing. If necessary (if stored for more than two years, or damp, or by acid gas pollution, etc.) can be used for tin treatment. Fully sealed solid tantalum capacitors, whether it is welding, or dip tin treatment, processing distance should be controlled in the technical specifications of the 3.2mm outside the sealing tin package, the temperature is not higher than 260 degrees, the time is not more than 5 seconds. Because the sealing material sealed solid tantalum capacitor is solder, if the time is too long, the temperature is too high or too close, body welding distance is less than 3.2mm, are likely to cause the sealing tin melting, lead capacitor humidity, seal, affect the electrical performance and reliability; serious, electric heated container internal negative pressure, the the seal cavity is caused by inhalation of solder, redundances and short circuit. For tantalum capacitor tin dipping treatment, at rated voltage and 85 DEG C aging 4 ~ 8 hours, and then measure the electrical properties (bipolar product per hour commutation time, leakage current should also be two directions were measured).

Tantalum capacitors can be stored for 14 years (except for welding), but storage for more than 2 years or dip tin tantalum capacitors, rated voltage is applied, the internal resistance of the power supply before the use of less than 3 ohm.

Tantalum capacitors should be used to avoid over temperature. High temperature will make the material properties change, due to a variety of thermal products with different coefficients of expansion, may produce internal stress due to product failure; long time storage at high temperature, the product may be produced due to internal stress failure. Therefore, the tantalum capacitor must be used in the temperature range of the standard.

The failure rate of the tantalum capacitor is the difference of the DC rating (85 C, rated voltage), and due to the different conditions (ambient temperature, applied voltage, circuit resistance, etc.). In the actual circuit, the voltage or current is often the peak impulse and ripple current, or other unexpected electric shock, so the actual use of the drop design is necessary. Proposed general down to 65%UR below, so as to ensure that the product and the complete line. When the ambient temperature is greater than 85, the amount of the reduction should be considered in the third article.


Non solid electrolyte tantalum capacitors in wet PH test before the leak should fully discharge, otherwise it will be due to incomplete discharge of the capacitor to the contact strip and the capacitor anode is red; the contact strip and the capacitor cathode is blue LED

主站蜘蛛池模板: 酒店大战丝袜高跟鞋人妻 | 日本少妇高潮喷水xxxxxxx | 国产成人精品一区二区三在线观看 | 国精产品一二三区精华液 | 中文有码无码人妻在线 | 久久久久中文字幕 | 日本黄a三级三级三级 | 中文字幕网伦射乱中文 | 成年视频在线观看免费 | 日韩精品 电影一区 亚洲 | 污版视频在线观看 | 99re久久资源最新地址 | va日本 | 午夜精品老牛av一区二区三区 | 久久精品中文字幕首页 | 性强烈的欧美三级视频 | 国产精品久久福利新婚之夜 | 小视频在线观看免费 | 午夜不卡一区二区 | 夜精品一区二区无码A片 | 亚洲色婷婷一区二区三区 | 国产丝袜在线 | 在线播放一区二区三区 | 日韩视频在线观看 | 成人亚洲性情网站www在线观看 | 草的我好爽视频 | 大桥未久亚洲无av码在线 | 成人精品一区二区三区电影 | 精品国产欧美一区二区 | 99久久精品无码一区二区毛片 | 亚洲欧美自拍制服另类图区 | 一级aaaaaa片毛片在线播放 | 中文字幕有码无码人妻av蜜桃 | 天天插天天舔 | 精品久久久久久久久中文字幕 | 天堂资源 | 久热中文字幕在线 | 欧美激情无码成人A片 | 手机在线观看亚洲国产精品 | 精品美女在线观看视频在线观看 | 一区二区成人国产精品 | 日本内射精品一区二区视频 | 国产免费毛卡片 | 亚洲精品国产第一区二区多人 | 精品无码国产自产拍在线观看蜜 | 久久婷婷影院 | 少妇被粗大猛进进出出s小说 | 国产v片在线播放免费无码 国产v亚洲v天堂a无码 | 免费看黄网址 | 91成人国产网站在线观看 | 台湾三级无遮挡在线播放 | 欧美日韩精品一区三区 | 精品国产三级a∨在线 | 无套内谢孕妇毛片免费看看 | 久久av网 | 国产黄在线观看免费观看软件视频 | 国产成人精品视频ⅴa片软件竹菊 | 婷婷丁香五月中文字幕 | 狠狠的干| 久久国产欧美日韩精品图片 | 国产欠欠欠18一区二区 | 无码熟妇人妻av在线影片 | 日韩免费一级片 | 久久精品蜜芽亚洲国产av | 一区二区三区四区国产 | 五月激情综合婷婷 | 国产真人作爱免费视频道歉 | 国产真实乱对白精彩久久老熟妇女 | 国产一区二区三区久久久久久久久 | 艳妇臀荡乳欲伦交换在线播放 | 国产综合久久久久影院 | 人禽伦免费交视频播放 | 二区欧美| 国产亚洲欧美精品永久 | 性色av无码一区二区三区人妻 | 亚洲国产一区二区三区 | 精品国产免费一区二区三区香蕉 | 美女羞羞网站妖精视频 | 曰韩精品| 成人综合婷婷国产精品久久蜜臀 | 欧美精品一区二区三区在线 | 一级一级毛片免费看 | 日日碰狠狠添天天爽超碰97 | 无码人妻一区二区三区兔费 | 天天干天天操天天透 | 亚洲色无码中文字幕手机在线 | 欧美性视频网 | 亚洲国产精品无码成人片久久 | 草草草在线视频 | 91涩涩视频| 国产成人亚洲精品无码h在线 | 欧美一区二区三区成人片在线 | 欧美日韩一区二区三区在线观看 | 亚洲热妇无码av在线播放 | 亚洲熟妇无码av另类vr影视 | 久久激情综合色丁香 | 国产AV一区二区三区传媒 | 日本乱偷人妻中文字幕 | 国产av精国产传媒 |