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電路板上不同型號的貼片式電容起什么作用
作者:紅寶電容 來源:http://www.dorgoomali.com 日期:2020-09-29 11:15 瀏覽

  貼片電容可分為無極性和有極性兩類,貼片電容的主要作用就是清除由芯片自身產生的各種高頻信號對其他芯片的串擾,從而讓各個芯片模塊能夠不受干擾的正常工作。

  Chip capacitors can be divided into two types: non polarity and polarity. The main function of chip capacitors is to eliminate the crosstalk of various high-frequency signals generated by the chip itself to other chips, so that each chip module can work normally without interference.

  在高頻電子振蕩線路中,貼片電容與晶體振蕩器等元件一起組成振蕩電路,給各種電路提供所需的時鐘頻率。

  In high frequency electronic oscillation circuit, chip capacitor and crystal oscillator are used to form oscillation circuit to provide clock frequency for various circuits.

  貼片電容有貼片式陶瓷電容、貼片式鉭電容、貼片式鋁電解電容。電路板上貼片電容的作用及極性的區分方法貼片式陶瓷電容無極性容量也很?。≒F級),一般可以耐很高的溫度和電壓,常用于高頻濾波。

  Chip capacitors include ceramic chip capacitors, tantalum capacitors and aluminum electrolytic capacitors. The function of chip capacitor on the circuit board and the method to distinguish the polarity. The non-polar capacity of chip ceramic capacitor is also very small (PF level). It can withstand high temperature and voltage, and is often used in high-frequency filtering.

貼片式電容

  1、貼片式鉭電容

  貼片鉭電容的特點是壽命長、耐高溫、準確度高、濾高頻改波性能極好,不過容量較小、價格也比鋁電容貴,而且耐電壓及電流能力相對較弱,被應用于小容量的低頻濾波電路中。

  Tantalum chip capacitors are characterized by long service life, high temperature resistance, high accuracy, excellent high frequency and wave changing performance. However, the capacity is smaller, the price is higher than that of aluminum capacitors, and the voltage and current resistance capacity is relatively weak, so it is used in low-frequency filter circuits with small capacity.

  2、貼片式鋁電解電容

  貼片式鋁電解電容擁有比貼片式鉭電容更大的容量,其多見于顯卡上,容量在300μF~1500μF之間,其主要是滿足電流低頻的濾波和穩壓作用。

  The capacity of chip type aluminum electrolytic capacitor is larger than that of tantalum chip capacitor. It is often found on the display card, and the capacity is between 300 μ F and 1500 μ F. it is mainly used to filter and stabilize the current at low frequency.

  3、貼片電解電容

  貼片電解電容的正負極區分和測量電容上面有標志的黑塊為負極。在PCB上電容位置上有兩個半圓,涂顏色的半圓對應的引腳為負極。也有用引腳長短來區別正負極長腳為正,短腳為負。

  The black block marked on the capacitor is the negative pole. On the PCB, there are two semicircles on the capacitor position, and the pin corresponding to the colored semicircle is the negative pole. Also useful pin length to distinguish between positive and negative, long pin is positive, short pin is negative.

  電容兩極之間的電阻叫做絕緣電阻或漏電電阻。只有電解電容的正極接電源正(電阻擋時的黑表筆),負端接電源負(電阻擋時的紅表筆)時,電解電容的漏電流才?。╇娮璐螅?。

  The resistance between the two poles of a capacitor is called insulation resistance or leakage resistance. Only when the positive pole of the electrolytic capacitor is connected to the positive power supply (the black probe when the resistance is blocked) and the negative terminal is connected to the negative power supply (the red probe when the resistance is blocked), the leakage current of the electrolytic capacitor is small (the leakage resistance is large).

  山東紅寶電子有限公司是一家專業代理電子元器件的服務商,電解電容、貼片電容、薄膜電容器、超級法拉電容、電阻器,保險絲,電感器具有極大優勢,海量庫存,原廠授權,超高性價比。

  Shandong Hongbao Electronic Co., Ltd. is a professional agent of electronic components Service Providers, capacitors, resistors, fuses, inductors have great advantages, massive inventory, original factory authorization, ultra-high cost performance.

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