FDH444

A diode is a two-terminal electrical device that allows current to flow in one direction only, blocking current in the opposite direction. Diodes are used as components in applications such as power supplies, wave shaping circuits, voltage regulators and signal processing applications. The FDH444 diode is a fast-recovery, very high-speed general-purpose diode.

The FDH444 is a single rectifier diode made with a silicon epitaxial junction. It features a low forward drop voltage, fast recovery time and high peak surge current capability. It is specifically designed for high-frequency and high forward current applications, and is suitable for use in applications such as free-wheeling and reversed-battery protection. Its stable forward characteristics and low leakage current make it an ideal choice for many power supply applications.

Application Fields

The FDH444 is widely used in high frequency power converter and switching power supply applications. It is widely used for powering DC motors and AC/DC adapters. It is also used as a free-wheeling diode in switching regulators, as part of EMI (electromagnetic interference) filter or other protection circuits, and in voltage doublers, clippers, and other types of circuits. It has also been used in automotive applications such as alternator regulators and starter motor control.

Working Principle

The FDH444 works by allowing a current to flow in one direction only, while blocking current flow in the opposite direction. The forward junction voltage (Vf) of the diode is low, so the diode requires a very small amount of power to operate. In forward operation, current flows through the diode and is blocked in the opposite direction. When the voltage across the diode exceeds its reverse breakdown voltage, it breaks down and allows current to flow in the opposite direction.

The FDH444 has a fast recovery time, allowing it to quickly switch from one direction to the other with minimal power loss. As such, it is well-suited for high-frequency applications, allowing for more efficient power conversion. Additionally, its low forward junction voltage allows for low power operation, making it more efficient than traditional rectifiers.

Overall, the FDH444 is a versatile, high-speed diode suitable for a wide variety of power-conversion applications. With its low forward junction voltage and fast recovery time, it is an ideal choice for many power supply and protection applications.