IRFB812PBF

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The IRFB812PBF is a high-voltage, high-current power MOSFET designed for a wide range of applications, including industrial, automotive, and consumer products. The device is available in an array of packages ranging from an ultra-compact SOT-223 to a large-sized TO-220. It is capable of operating at very high frequencies and has an exceptionally low on-resistance of 1.5 OHm. Also, the device features an improved process and gold metalization that enhances its performance, particularly in power supply, motor drive, and lighting applications.

At the heart of the IRFB812PBF, is a vertical DMOS with a source port. A vertical power MOSFET is constructed with a semiconductor substrate and a source contact. The source contact is generated by special evaporation of a metallic layer (typically gold). Depending on the voltage, the cells of the vertical device open up to allow current flow from Drain to Source. Since the MOSFET is a voltage-controlled device, a higher voltage at the Source port will lead to an increase in current.

The IRFB812PBF\'s gate is insulated from the undoped substrate by a dielectric semiconductor material called the gate-oxide. The gate oxide can be in the form of a thin film, or it may be a thicker dielectric. The gate oxide forms an integral part of the device, since it serves as the electrical connection between the gate and the underlying substrate. It is also necessary for controlling current flow between the drain and the source ports.

The IRFB812PBF is also capable of withstanding high voltages, and its drain source breakdown voltage is rated up to 100V. In addition, the device features a low gate-source capacitance(Cgd), which makes it well suited for high-performance switching applications. The maximum drain current carrying capabilities of the IRFB812PBF are in the range of 9.5 A to 15A.

In terms of its application fields, the IRFB812PBF is suitable for high-frequency switching applications, as well as local power supply designs, motor control, and applications requiring low switching losses, such as driver and lighting applications. Its high performance and low profile make it a suitable choice for portable electronic products and battery-powered applications.

In terms of working principle, the IRFB812PBF is based on the insulated gate field-effect transistor or IGFET. An IGFET, also referred as a MOSFET (metal-oxide-semiconductor field-effect transistor), operates on a principle of a voltage-controlled electrostatic field. A positive voltage between the gate and the source will cause an electric field to form in the vicinity of the gate and attract the electrons from the channel and onto the gate, thus reducing the width of the channel and the current flowing between the source and the drain. Conversely, should the voltage between the gate and source become negative, then the electric field will go in the opposite direction and allow electrons to flow into the channel, thus allowing more current to flow from the source to drain.

For enhanced performance, the IRFB812PBF features an enhanced thermal resistance and low gate charge, allowing for improved switching performance and higher efficiencies. Also, the device is equipped with a dual-mode PWM regulator, which helps to minimize the switching loss and minimizes power dissipation. This is particularly valuable in applications where a high switching frequency is needed.

Overall, the IRFB812PBF single power MOSFET provides an ideal solution for a range of demanding applications that require high-voltage, high-current supplies with medium power output. Thanks to its exceptional on-resistance, wide dynamic range and low-leakage characteristics, the device makes it possible to achieve improved signal integrity, better system efficiency and reduced overall power dissipation.

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