关键词: 电解电容, ESR, 纹波电流, 脉冲电流

Abstract: Electrolytic capacitors are indispensable key energy storage and power conversion components in electronic products. In high-voltage, high-ripple current power conversion applications, the life of electrolytic capacitors is the shortest relative to other electronic components, and the key parameter affecting their lifetime is equivalent series resistance(ESR). The advantages and disadvantages of the traditional ESR test method are analyzed. A measurement method of electrolytic capacitor ESR under pulse current is proposed, and its feasibility is proved by experimental analysis.

Key words: electrolytic capacitor, ESR, ripple current, pulse current