IRF820A

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IRF820A is a power MOS field effect transistor (MOSFET) designed to be driven by a wide range of DC and AC signals. It is one of the most popular and commonly used MOSFETs due to its versatility and low cost. The IRF820A is a versatile, high performance, 55 volt N-Channel power MOSFET. It offers high-speed switching performance, good thermal control and low RDS(on) characteristics.

The IRF820A is recognized for its standard package size and offers stable, low gate-to-source threshold voltage. It offers a breakdown voltage of 55V and a continuous drain current of 7 A. The device also boasts of high speed switching speeds with a turn-on delay time of 10 ns, a rise time of 75 ns, and a fall time of 95 ns. It comes with the characteristic of low gate charge with a gate-source capacitance of 4.3 nC.

The IRF820A finds multiple uses in switching applications such as in power management circuits, DC/DC converter, LCD monitors/television, AC/DC SWITCHER, consumer electronics, and so on. It is also used in lighting systems, telecom/datacom applications and power distribution systems. It offers protection from EMI and LCD noise.

The working principle of the IRF820A is based on the MOSFET structure. MOSFET stands for Metal-Oxide Semiconductor Field Effect Transistor. The device is composed of an insulated gate, located on a conductive substrate with one to four respective drain and source contacts. The operation of a MOSFET is based on the principle of voltage which induces a field effect in a thin layer of oxide placed in between the gate-source and gate-drain. This process is known as the “Field Effect Principal”.

The voltage applied to the gate terminal of the MOSFET will produce a field at the oxide-semiconductor interface, which will change the current ID, flowing through it. This turned on state of MOSFET can be established by providing the gate voltage required to match the threshold voltage of the device, which is usually less than 4V. When the voltage VGS is below the threshold voltage, the MOSFET is in a turned-off state. The current flowing from the drain to the source is called the drain current.

In the case of IRF820A, the voltage applied to the gate terminal produces an electric field at the Oxide-Semiconductor interface which acts on the n-type material. This will induce a change in the conductivity of the n-type material and thereby controls the drain current. The current ID that the drain of the IRF820A can handle is 7A.

The IRF820A is widely used in circuits across a wide range of applications due to its versatility and low cost. It features low input capacitance, fast switching speeds, low RDS (On) values, and good thermal control. Moreover, the IRF820A is also widely used in wide resistive and capacitive loads due to its excellent transistor characteristic.

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