ER1840-29JP

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Fixed Inductors play an important role in contemporary electronics, enabling a wide variety of current-controlled devices and providing an efficient way to eliminate unwanted electrical signals. An example of a fixed inductor is the ER1840-29JP, which is widely used in AC, DC and RF applications. This article discusses the application field and working principle of the ER1840-29JP.

The ER1840-29JP is a low-loss, high-frequency, low-inductance multilayer inductor designed for use in a wide variety of switching power supplies, DC/DC converters, DC/AC inverters, and line synchronization applications. It can be used in isolated and non-isolated power supplies with an operating frequency range of 0.5 to 2.2 MHz. The parts have a 4 mm x 4 mm ceramic body with an inductance range of 2 uH to 28 uH and an operating temperature range of –40°C to +85°C.

The ER1840-29JP is made of a three-layer coil construction, with two main coils and one coil for magnetic return. The two main coils, referred to as the A and B coils, form a series and parallel connection. The A and B coils are connected in series with each other at one end, while the other end is connected in parallel to each other. The magnetic return coil is connected at the outer ends of the A and B coils. This connection provides shielding, reducing the common-mode current. The part also features an internal overcurrent sensing coil, which is used in some applications to control the switching of the power supply.

The ER1840-29JP’s application field includes switching power supplies, voltage converters, DC/DC converters, DC/AC inverters, inverter power supplies, line synchronization, and more. Its high frequency operation enables it to be used in applications with higher switching power requirements. For example, it can be used in high frequency motor drives and other applications requiring rapid current changes.

The working principle of the ER1840-29JP is based on the principles of induction. When an alternating current passes through the two main coils, an electromotive force (EMF) is produced, which in turn induces a circulating electric current in the magnetic return coil. This induces a magnetic field in the return coil, which reacts with the field of the alternating current in the main coils. This reaction produces an electromagnetic field, which opposes the alternating current in the main coil, producing an inductive force that limits the current flow. By controlling the inductance of the main coils, the strength of the inductive force can be changed to meet the power requirements of the application.

In summary, the ER1840-29JP is a low-loss, high-frequency, low-inductance multilayer inductor designed for use in a wide variety of switching power supplies, DC/DC converters, DC/AC inverters, and line synchronization applications. It is known for its excellent frequency response and superior current handling capabilities. The working principle of the part is based on the principles of induction, where an alternating current applied to two main coils produces an EMF, which in turn induces a circulating electric current in a magnetic return coil, producing an inductive force that limits the current flow. The ER1840-29JP is a versatile and reliable device for a variety of current-controlled applications.

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