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Aluminum Electrolytic Capacitors

Aluminum Electrolytic Capacitors (AECs) are energy storage devices used in a variety of electronic applications. They are composed of two Aluminum plates separated by an electrolytic separator. The AECs used in printed circuit boards, also referred to as chip capacitors, generally feature a thin, flexible plastic film that is wrapped around the aluminum and provides insulation from short circuits.

The LGN2H151MELA45 AEC is available in a variety of types, primarily designed for use in high-speed digital, switch-mode, visual and video applications. Featuring an aluminum-foil electrolytic separator and a thin plastic insulator between the two plates, the LGN2H151MELA45 offers high-speed operation, low ESR, low ESR and long-term reliability.

The primary application for the AEC is in high-speed digital circuit boards. The aluminum separator and flexible plastic insulator reduce the parasitic capacitance that can normally cause interference and crosstalk issues in high-speed designs. This capacitance is critical for signal clarity and must be low enough to prevent performance degradation and flickering, especially at high frequencies. The LGN2H151MELA45 is also used in energy-sensitive and high-bandwidth designs, such as HD video, 3D video, automotive GPS and automotive audio systems.

The LGN2H151MELA45 AEC also offers good temperature tolerance, vibration tolerance and long-term reliability. The components are designed for continuous operation and come with a long-term warranty. This is important as the devices are likely to experience multiple heating/cooling cycles over their lifetime. The noise suppression characteristics of the AEC are superior to other types of capacitors in the same frequency range.

The working principle of an aluminum electrolytic capacitor is based on Faraday’s Law of Electromagnetic Induction. When electricity passes through the capacitor, an electric field is created inside the capacitor, which in turn causes a separation of positive charge carriers (electrons) and negative charge carriers (ions). This separation causes an accumulation of ions in the separator, resulting in the formation of an electrolyte that serves as an insulator between the two plates. This creates a charge potential across the capacitor that stores energy until required.

The LGN2H151MELA45 is designed for high-current applications and can withstand high peak currents. The capacitance of the unit can be programmed with a potting process to give a stable capacitance over time. The components can be used in high ambient temperatures; typical operating temperatures range from -40 to +85 °C.

In summary, LGN2H151MELA45 AECs provide reliable operation at high frequencies and high currents in a wide range of applications. They offer high-speed operation, low-ESR, long-term reliability and a programmed capacitance that is stable over time. The aluminum separator and flexible plastic insulator provide superior noise suppression capabilities than other types of capacitors in the same frequency range, making them ideal for use in high-speed digital, switch-mode, visual and audio applications.

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