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
无码强姦精品一区二区三区 | 中文字幕乱人伦视频在线 | 日韩内射美女片在线观看网站 | 色老汉亚洲AV影院天天精品 | 91亚洲一区二区三区在线无码 | 国产精品久久久久久亚洲影视 | 亚洲∧V无码乱码在线观看 午夜视频体内射.COM.COM | 亚洲熟妇无码乱子AV电影 | 久久精品国产亚洲AV超碰 | 国产乱子伦农村叉叉叉 | 99re在线视频免费观看 | 精品人妻少妇一区二区三区在线。 | 亚洲AV无码电影在线播放 | 久久国产无码模特视频 | 国产色青青视频在线观看撒 | 无码人妻丰满熟妇区毛片18 | 久久九九有精品国产23 | 看片在线观看视频免费 | 国产日韩欧美视频在线观看 | 人妻无码久久精品人妻成人 | 国产高清日韩一区二区四季 | 国产精品无码A∨在线播放 国产成人精品手机在线播放 | 国产精品成人自产拍在线观看6 | 无码一区二区三区亚洲人妻 | 国产精品久久无码一区AV | 国产午夜精品一本在线观看 | 国产欧美精品一区二区小说 | 18岁以下禁止进入国产一区 | 国产日韩精品一区二区四虎 | 国产精品激情久久久久久久 | 中字幕视频在线永久在线 | 中文字幕AV在线一二三区 | 91福利无码国产正在播放 | 人人妻人人澡人人爽欧美一区 | 久久亚洲AV无码精品线院 | 妖精视频美女亚洲欧美日韩 | 男人的天堂无码Av色偷偷 | 亚洲欧美国产另类首页 | 尤物九九久久国产精品 | 久久久久久久久无码毛片 | 亚洲国产中文在线二区三区免 |