作為L(zhǎng)ED驅(qū)動(dòng)電源中的重要部件，鋁電解電容也必須達(dá)到耐高溫、小型化、長(zhǎng)壽命等要求。從而導(dǎo)致LED的設(shè)計(jì)變更頻繁。由于行業(yè)準(zhǔn)入門檻低及市場(chǎng)檢驗(yàn)標(biāo)準(zhǔn)不一，以致于LED產(chǎn)品參差不齊。
As an important part of LED driving power supply, aluminum electrolytic capacitor must also meet the requirements of high temperature resistance, miniaturization and long life. As a result, led design changes frequently. Due to the low industry access threshold and different market inspection standards, LED products are uneven.
鋁電解電容作為應(yīng)用于LED上的被動(dòng)元器件，當(dāng)前市場(chǎng)上很多新的設(shè)計(jì)方案及工藝改進(jìn)非常勉強(qiáng)，設(shè)計(jì)余量消弱，加之LED變換速度太快，相關(guān)的驗(yàn)證又不足，故LED應(yīng)用端在電容材料的選用上容易存在誤區(qū)。
As a passive component used in LED, many new design schemes and process improvements in the current market are very reluctant, and the design margin is weak. In addition, the LED conversion speed is too fast and the relevant verification is insufficient. Therefore, there are some misunderstandings in the selection of capacitor materials at the application end of LED.
1.LED市場(chǎng)端對(duì)產(chǎn)品的體積最小越好
The minimum volume of LED market is better
因?yàn)長(zhǎng)ED體積的限制，體積小型化是未來的必然趨向。與節(jié)能燈相比，LED設(shè)計(jì)工程師對(duì)小體積電容的追求幾近苛求，節(jié)能燈的設(shè)計(jì)工程師深知電解壽命決定燈的壽命，所以在電解電容的選用上面非常的慎重，因?yàn)樗麄冎?，適當(dāng)加大體積對(duì)電解的散熱及耐紋波能力都有重要幫助。
Because of the limitation of LED volume, miniaturization is the inevitable trend in the future. Compared with energy-saving lamps, led design engineers are almost demanding for small volume capacitors. Design engineers of energy-saving lamps know that electrolysis life determines lamp life, so they are very careful in the selection of electrolytic capacitors, because they know that properly increasing the volume is of great help to the heat dissipation and ripple resistance of electrolysis.
近兩年來，LED產(chǎn)品更新?lián)Q代過快，留給LED產(chǎn)品實(shí)驗(yàn)驗(yàn)證的時(shí)間極短，以致于LED工程師降低了對(duì)產(chǎn)品驗(yàn)證的周期，甚至于對(duì)鋁電解電容采用簡(jiǎn)易檢測(cè)或唯小型化及LOW ESR為標(biāo)準(zhǔn)論，這對(duì)電解電容的應(yīng)用是一個(gè)極大的風(fēng)險(xiǎn)及挑戰(zhàn)。
In the past two years, LED products have been updated too fast, leaving a very short time for LED product experimental verification, so that led engineers reduce the cycle of product verification, and even adopt simple detection or miniaturization and low ESR as the standard theory for aluminum electrolytic capacitors, which is a great risk and challenge for the application of electrolytic capacitors.
2.鋁電解電容的阻抗越低越好
The lower the impedance, the better
阻抗低到什么程度才算合理，是不是越低越好，這個(gè)在LED應(yīng)用中并無明顯的共識(shí)或相應(yīng)的標(biāo)準(zhǔn)。國(guó)內(nèi)低阻抗的電解設(shè)計(jì)方案中對(duì)降低阻抗通常采用兩個(gè)方案，一是提高電解液的含水量，一是用低密度或低厚度的電解紙。
There is no obvious consensus or corresponding standard in LED application to what extent the impedance is reasonable and whether the lower the better. There are two ways to reduce the impedance in domestic electrolytic design with low impedance, one is to increase the water content of electrolyte, the other is to use electrolytic paper with low density or thickness.
目前LED照明行業(yè)技術(shù)逐漸走向了成熟，LED燈具正朝著輕、薄、小的趨勢(shì)發(fā)展，這對(duì)驅(qū)動(dòng)電源的要求也越來越高。作為L(zhǎng)ED驅(qū)動(dòng)電源中的重要部件，鋁電解電容也必須達(dá)到耐高溫、小型化、長(zhǎng)壽命等要求。
At present, the technology of LED lighting industry is gradually becoming mature, and LED lamps and lanterns are developing towards the trend of light, thin and small, which requires higher and higher driving power supply. As an important part of LED driving power supply, aluminum electrolytic capacitor must also meet the requirements of high temperature resistance, miniaturization and long life.