onsemi 1N5817G Schottky Barrier Rectifier: Key Specifications and Applications

The onsemi 1N5817G is a highly efficient Schottky Barrier Rectifier designed for high-frequency switching and low-voltage applications. Its construction utilizes Schottky barrier principles, resulting in a very low forward voltage drop and extremely fast switching capabilities. This makes it an ideal choice for modern power supply designs where efficiency and thermal performance are critical.

Key Specifications

The device stands out due to its exceptional electrical characteristics. It features a low forward voltage drop (VF) of typically 0.45V at a forward current of 1A, which significantly reduces power loss and heat generation compared to standard PN-junction rectifiers. Its maximum average forward current (IF(AV)) is 1A, with a peak repetitive reverse voltage (VRRM) of 20V. A crucial advantage is its extremely fast recovery time, which is virtually nonexistent as a property of the majority carrier conduction in Schottky diodes. This eliminates reverse recovery current-related losses and noise in high-speed circuits. The device is also packaged in a compact and industry-standard DO-41 package, making it suitable for automated assembly processes.

Primary Applications

The 1N5817G is extensively used in a wide array of electronic circuits. Its primary application is as a polarity protection diode and as a freewheeling diode in switch-mode power supplies (SMPS), DC-DC converters, and inverters. It is also perfectly suited for high-frequency rectification tasks that are beyond the capabilities of standard diodes. Common end-products include:

Power Adapters and Chargers: For efficient AC to DC conversion.

Reverse Voltage Protection Circuits: Safeguarding sensitive components in automotive and battery-powered systems.

DC-DC Buck/Boost Converters: Serving as the output rectifier to improve overall efficiency.

Signal Demodulation: In some high-frequency radio applications.

ICGOOODFIND: The onsemi 1N5817G is a fundamental component for designers seeking to enhance efficiency and performance in low-voltage, high-frequency power circuits. Its low VF, fast switching, and 20V rating make it a reliable and cost-effective solution for power management, protection, and rectification.

Keywords:

Schottky Barrier Rectifier

Low Forward Voltage

Fast Switching

Power Supply

Freewheeling Diode