aⅴ网站亚洲国产小电影_日韩毛片免费观看_色噜噜噜在线视频播放_国产丝袜无码免费视频_真的能在线观看的黄色网站国产免费_欧美成人7601av在线观看_亚洲区欧美区中文字幕_激情高清大毛片_内射少妇三洞齐开_59sao热色原在线视频观看

郵箱:mkdzyhs@163.com 電話:18136969561

行業(yè)新聞


電路板的集成度有所提高

作者:shan 來(lái)源:本站 點(diǎn)擊:0 時(shí)間:2024-04-10 10:13:33

The damage to higher integration circuit boards nowadays can cause many unnecessary troubles, and the significance of circuit protection has many aspects. Preventing circuit damage is one of the more important aspects. For example, the usage environment of many car mounted devices is more harsh than that of general electronic products, and they will generate a large instantaneous peak voltage when starting and stopping. At this time, it is necessary to use overvoltage protection components in the power adapter of these electronic devices.

For example, communication equipment is often troubled by surges, which include surge voltage and surge current. They are a type of spike pulse with extremely fast rising speed and short duration, which can instantly exceed the peak value of the device's stable value. This requires the use of a combination of multiple voltage transient and surge protection devices to form a multi-level protection circuit to ensure foolproof operation.

Of course, in addition to preventing accidental circuit damage, it can be seen that the working voltage of semiconductor device ICs is developing towards lower and lower trends. Protecting their circuits can also reduce energy loss, reduce circuit heating, and extend the service life of ICs.

The development of integrated circuits has driven the increasing diversification and complexity of electronic circuit products, resulting in more situations that may harm circuits. Circuit protection has become increasingly important.

Devices required for different circuit protection

Overvoltage protection is already an essential part of the circuit. Overvoltage protection devices are responsible for protecting the circuit from high voltage. The principle of this device is to use the potential difference to achieve the effect of circuit protection. When the voltage in the circuit exceeds the specified value, the internal circuit structure of the overvoltage protection device generates a certain potential difference with the circuit, thereby enabling the circuit to achieve protection through impedance changes.

At the same time, the internal current and voltage protection device of the overvoltage protection device will disconnect the circuit, preventing the current from further flowing to the protected electrical appliance or equipment, achieving the effect of protecting the electrical appliance or equipment.

Typical overvoltage protection devices are varistors and transient suppressors (TVS). Varistors can be said to be the most commonly used overvoltage protection device, with low cost, good effect, and high cost-effectiveness. The ns level response speed enables it to handle overvoltage protection work in the vast majority of cases.

Based on the nonlinear volt ampere characteristics of varistors, under normal circumstances, varistors act as a switch in an open state. When an overvoltage exceeds their rated voltage in a circuit, the resistance value of the varistor rapidly decreases to reduce the impact of overvoltage on subsequent circuits.

The characteristic of TVS is its fast response. When the transient voltage is too high, the TVS diode produces avalanche, causing the instantaneous large current to be diverted from the low resistance path, avoiding circuit damage as a result. Both have their own focuses, and TVS has more advantages in dealing with transient overvoltage impacts.

Overcurrent devices often use various fuses, such as glass tube fuses, chip fuses, and polymer fuses. They are simple to use and have obvious effects. Polymer fuses limit current by increasing resistance and have excellent recoverable characteristics. When used for overcurrent protection, the circuit can automatically return to a conductive state.

Glass tube fuses and chip fuses are directly fusing conductive fuses. Nowadays, there are more and more solutions using eFusion, which directly tracks current and has its unique advantages.

In circuit protection, there are also some electrostatic protection components involved, especially in high integration circuits where ESD protection is not installed. The high-voltage ESD impact generated through interface connections can cause high current peaks to directly flow into the integrated circuit, causing damage. To protect sensitive circuits from electrical overstress faults, the ESD protection diode should be connected to each signal line between the interface connector and the integrated circuit, with different interface speeds corresponding to different capacitance values of the ESD diode.


留言

Facebook

WhatsAPP

948760486

mkdzyhs@163.com

18136969561

Top
动漫无码无遮挡在线看中文 | 亚洲乱码成熟视频在线播放 | 内射无码AV-区二区在线观看 | 国产AV无码一区精品 | 成人动漫精品一区二区二区 | 国产免费tv一区二区无码 | 内射囯产旡码丰满少妇 | 日本久久中文字幕一区二区三区 | 无码人妻天天拍夜夜爽 | 国内精品久久久久影院优 | 91精品伊人久久大香线蕉 | 中文精品无码中文字幕无码专区 | 国产真人无遮挡作爱免费视频 | 3D动漫精品啪啪一区二区免费 | 日本一区二区三区在线视频 | 国产乱子夫妻XX黑人XYX真爽 | 亚洲精品无码久久久久久 | 国产熟女偷窥一区二区视频 | 久久久久国色AV免费观看 | 国产欧美精品一区二区色综合 | 最近免费中文字幕大全免费版视频 | 亚洲无码一区二区三区在线 | 草草久久久无码国产专区 | 精品亚洲成AV片在线观看 | 日韩人妻在线一区二区三区 | 中文无码AV在线亚洲电影 | 久久AV片毛片精品一级一区 | 亚洲AV无码久久精品色欲 | 免费无码一区二区三区蜜桃大 | 亚洲中文字幕高清有码在线 | 国产成人手机高清在线观看网站 | 欧美日韩国产无限码高清免费 | 国产成年无码V片在线 | 日韩欧美一区二区久久婷婷 | 亚洲美女又黄又爽在线观看 | 亚洲mv大片欧洲mv大片入口 | 亚洲午夜久久久久久久国产 | 欧美日一夲道一区二区三区 | 精品国产一区二区国产馆小说 | 少妇无码一区二区二三区 | 欧美日韩国产一区二区三区 |