SRU3028-220M

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Fixed Inductors are commonly used in electric circuits to serve several purposes, such as energy storage, radio frequency (RF) chokes, and impedance matching. The SRU3028-220M fixed inductor is a high quality miniature SMD inductor manufactured by ROHM, and is available in 24 and 32 pin packages for a wide variety of applications. The SRU3028-220M was developed as an improved replacement for the popular SRU3025-220M inductor, offering heightened performance and greater stability.

Overview

The SRU3028-220M inductor is mainly used in switch mode power supplies (SMPS), dc-dc converter circuits, and in any application that needs high efficiency, low ESR, and high peak current through power supply filters. It is a high quality fixed inductor with a rated current of 220mA, rated inductance of 2mH, and an operating temperature range of –55°C to + 125°C.

The device is RoHS compliant, features excellent heat dissipation, and a low stray-field for close placement to other components. It is manufactured in a miniaturized, surface mount style, making it ideal for high-density circuits. The SRU3028-220M offers superior ESR performance compared to other inductors in the SRU3000 series, and is rated for commercial, industrial, and auto-grade temperature ranges.

Mechanical Characteristics

The SRU3028-220M is constructed of a ferrite core with a ceramic body. It has a footprint of 0.6x0.6x0.4mm and comes in 24 and 32 pin packages. The inductance values remain relatively consistent over a wide range of temperature and are highly linear.

The maximum DC bias for this device is 0.8VA, which allows for high reliability operation. The inductance is relatively low, so the device does not require much current for efficient operation. The inductor is capable of handling high peak current because of its low saturation level. The SRU3028-220M is also able to withstand high temperature environments.

Working Principle

The SRU3028-220M inductor works on the principle of induction. When a current is passed through the coil, the resulting magnetic field induces an electromotive force (EMF) in the core. This EMF opposes the applied current and is known as back EMF. As the current increases in magnitude, the back EMF also increases until the two forces become equal and oppose each other. At this point, the current cannot increase any further. This is known as the saturation point of the coil.

The SRU3028-220M is an ideal device for high efficiency applications because it has a low DC resistance and a low saturation point. It is able to transfer energy from one electrical circuit to another with minimal losses. The low DC resistance also prevents undue losses through self-heating. The SRU3028-220M has a relatively low inductance value (2mH), which makes it highly efficient at low frequencies.

The SRU3028-220M is used in a wide range of applications, including switching power supplies, dc-dc converters, impedance matching, and RF chokes. It is also commonly used for energy storage, when high efficiency and low ESR are desired. This device is RoHS compliant, and able to operate over a wide temperature range from -55°C to +125°C.

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