SBAT54ALT3G

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The SBAT54ALT3G is a diode-rectifier array belonging to an extensive portfolio of power management products manufactured by ON Semiconductor. This advanced device is ideal for high-speed switching applications, such as those encountered in commercial, industrial and automotive sectors. This article aims to provide a comprehensive overview of the SBAT54ALT3G device, including its features, application fields and working principle.

Features

The SBAT54ALT3G is a Schottky rectifier provided in an SOT-23, eight-pin package, offering advanced on-resistance characteristics and packaged in a small form factor. This device is designed to deliver a low forward voltage drop, ideal for when the power efficiency and heat dissipation of the circuit are of utmost importance. The maximum average forward current of this rectifier is 520 mA, while its solder temperature, during assembly and soldering, is limited to 260C.

Application field

The SBAT54ALT3G diode-rectifier array is particularly suited for applications requiring low power loss and heat dissipation, such as those employing high-speed switching such as DC-DC converters, battery management systems, and automotive power conversion. This device is also preferred in applications where the power efficiency is of utmost importance and quick recoveries, such as in telecom and data storage systems.

Working principle

The function of the SBAT54ALT3G diode-rectifier array is to clip the peak voltage of AC or pulsed DC signals, providing a DC output. This device is composed of two Schottky rectifiers electrically coupled in a common cathode configuration, which forms a center-tapped full-wave rectifier. When the input voltage is greater than the reverse voltage threshold, the Schottky diodes turn on and the output current flows from the common anode to the half of the capacitor connected to the cathode, reducing the output peaks until the reversed voltage is below the device’s threshold.

When the input voltage falls below the reverse voltage threshold, the Schottky diode turn off and the current flows from the half of the capacitor connected to the common anode to the half connected to the common cathode, charging the capacitor and providing a positive output. This process is then repeated with each positive and negative cycle of the input voltage, and the resulting output is a clipped voltage of the input AC or pulsed DC signal.

In conclusion, the SBAT54ALT3G is an advanced diode-rectifier array designed for the high-speed switching applications found in commercial, industrial and automotive power management designs. This device offers advanced on-resistance characteristics, allowing for low power loss and high power efficiency. The resulting output of the SBAT54ALT3G is a clipped voltage from the input AC or pulsed DC signal, ideal for applications such as DC-DC converters and battery management systems.

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