What issues should be considered when choosing aluminum electrolytic capacitors?

Aluminum electrolytic capacitors are a common feature of power supply selection due to their low cost. However, their lives are limited and are affected by extreme conditions of high and low temperatures. Place the aluminum electrolytic capacitors on both sides of the sheet metal where the electrolyte is saturated. The electrolyte is evaporated over the life of the capacitor and its electrical performance is changed. If the capacitor fails, there will be a serious reaction: pressure builds up in the condenser, forcing it to release flammable and corrosive gases.

Aluminum electrolytic capacitors are usually the lowest cost option. However, you need to determine whether its disadvantage is harmful to the application. It needs to pass its operating temperature, taking into account its life. In addition, you need to appropriately reduce its rated voltage so that you can reach the lowest temperature operation and achieve the longest service life. Finally, you need to understand the range of ESR that must be used, so that you can design an appropriate control loop, and the ripple specification meets the design requirements.