LQH43NN390K03L Inductors, Coils, Chokes

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Fixed inductors, also known as chokes, are electronic components used to store and release energy. Generally, they consist of a coil of wire with a core in the middle that can be made from various materials such as iron, air, or ferrites depending on the application. The inductance of the device depends on the size and shape of the core, as well as the number of turns in the windings. The device also has resistance due to the wire and insulation used in the winding.

The LQH43NN390K03L is an example of a fixed inductor. This component has a rating of 390nH and can handle up to 1A of current at 20°C. It also offers a low DC resistance of 0.38 Ohms with a tolerance of ±5%. The package is of the shielded SMD type, so it can be used in high-density printed circuit boards. The device also has a noted temperature range of –40°C to 85°C.

The primary application for the LQH43NN390K03L is in line-frequency power output circuits. The most common use for them is in switching power supplies, where they provide a smooth dc output and also act as protection against overvoltage surges. The device can also be used in low-frequency power filter circuits. When connected in parallel with capacitors, it can form a filter to reduce noise and ripple from the output signal.

The working principle of an inductor is based on Faraday\'s law of induction. This states that whenever a current passes through a coil of wire, a voltage is induced, which is proportional to the rate of change in the current. This voltage opposes the change in current, creating a self-induced voltage known as inductance. Since the voltage always acts against a current change, inductors are used to control the flow of current, slowing it down or preventing it from changing too quickly. This makes them especially useful in power output circuits, where they can help to reduce voltage ripples and provide surge protection.

In summary, the LQH43NN390K03L is a fixed inductor with a rating of 390nH and a DC resistance of 0.38 Ohms. It is commonly used in power output circuits such as switching power supplies for filtering and protection against overloads. The working principle of the device is based on Faraday\'s law of induction, which states that a voltage is induced when a current passes through a coil of wire. This voltage opposes the current, allowing the inductor to control the rate of change in the current.

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