47μF/100V的電容基本上都是鋁電解電容，電解電容廠家發(fā)現(xiàn)這種電容高頻性能較差，電容量也不是很穩(wěn)定，并且耐壓值達(dá)100V的電解電容，體積一般都較大，在電路中這種電容一般作為高壓濾波電容或耦合電容。
47 μ f / 100V capacitors are basically aluminum electrolytic capacitors. Electrolytic capacitor manufacturers found that the high-frequency performance of this kind of capacitor is poor, and the capacitance is not very stable. Moreover, the electrolytic capacitor with voltage withstand value of 100V is generally large. In the circuit, this kind of capacitor is generally used as high-voltage filter capacitor or coupling capacitor.
雖然一些超低頻振蕩電路或定時(shí)電路會(huì)用到47μF的電解電容，但這類電路的工作電壓一般較低，即使用到47μF的電解電容，也不會(huì)選用耐壓值這么高的電解電容，因?yàn)樵陔娙萘肯嗤瑫r(shí)，一般電解電容的耐壓值越高，體積就越大。
Although some ultra-low frequency oscillation circuit or timing circuit will use 47 μ f electrolytic capacitor, the working voltage of this kind of circuit is generally low, that is, the electrolytic capacitor with 47 μ f will not be selected with such high withstand voltage value, because when the capacitance is the same, the higher the withstand voltage value is, the larger the volume will be.
這種47μF/100V的電解電容，在電源電壓較高的濾波電路和耦合電路中較常用。像上圖所示的RC降壓LED驅(qū)動(dòng)電路中，一般都在LED燈珠兩端并聯(lián)一個(gè)數(shù)十μF的濾波電容，若驅(qū)動(dòng)電路驅(qū)動(dòng)的是十幾個(gè)串聯(lián)的白光LED燈珠，濾波電容C2一般選用耐壓值為100V的濾波電容，其容量大都為10～47μF。
This 47 μ f / 100V electrolytic capacitor is commonly used in filter circuit and coupling circuit with high power supply voltage. In the RC step-down LED drive circuit as shown in the above figure, a filter capacitor with tens of μ f is generally connected at both ends of the LED lamp bead. If the driving circuit drives more than ten white LED beads in series, the filter capacitor C2 generally selects the filter capacitor with voltage withstand value of 100V, and its capacity is mostly 10-47 μ F.
電解電容廠家在與眾多廠家合作的同時(shí)，發(fā)現(xiàn)一些測(cè)量?jī)x表中的高壓交流放大器，若采用阻容耦合，一般也會(huì)用到47μF/100V的電解電容。
In cooperation with many manufacturers, electrolytic capacitor manufacturers have found that 47 μ f / 100V electrolytic capacitor will be used in some high-voltage AC amplifiers in measuring instruments if resistance capacitance coupling is adopted.