DC Resistance (DCR):	397 mOhm Max
Height - Seated (Max):	0.079" (2.00mm)
Size / Dimension:	0.189" L x 0.189" W (4.80mm x 4.80mm)
Supplier Device Package:	--
Package / Case:	Nonstandard
Mounting Type:	Surface Mount
Inductance Frequency - Test:	10kHz
Operating Temperature:	-30°C ~ 100°C
Ratings:	--
Frequency - Self Resonant:	--
Q @ Freq:	--
Series:	PM42S
Shielding:	Shielded
Current - Saturation:	--
Current Rating:	410mA
Tolerance:	±30%
Inductance:	22µH
Material - Core:	Ferrite
Type:	Wirewound
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

Fixed inductors such as the PM42S-220 are integral components in a variety of electronic applications, and the working principles of these components are fairly straightforward. This article will cover the types of applications in which the PM42S-220 is used and how it works.

Types of Applications

The PM42S-220 is a ferrite-bead power-inductors offering excellent performance in DC-DC and SMPS applications. It is a high current inductor measuring 6.2mm × 7.2mm with an inductance value of 8.2μH, allowing it to be used in noisy and DC-DC converter systems. Power conversion in the form of switching DC-DC and SMPS applications require the use of a PM42S-220 for regulating power efficiently. The PM42S-220 can also be used in noise-suppression applications such as those in automotive environments, where there is a high potential for noise interference.

Working Principle

The PM42S-220 is a fixed inductor which creates an electromagnetic field when correctly connected on the power-side of a DC-DC or SMPS. This inductor is connected either side of the power line, either in parallel with the supply voltage or in series, in order to regulate the power input. The electromagnetic field generated by the PM42S-220 works to either reduce the noise or increase the voltages supplied.When connected in parallel, the PM42S-220 works to reduce the noise of the system and provide a clean power supply. This is achieved by blocking out any unwanted frequencies, while still allowing DC supply to pass through. The alternating current is blocked out, reducing levels of noise interference and improving the signal-to-noise ratio.When connected in series, the PM42S-220 works to increase the supply voltage. This is achieved by creating an inductive reactance on the power line, limiting the amount of current which can pass through, thus increasing the voltage available for the system to utilize.

Conclusion

The PM42S-220 is a ferrite-bead power inductor which can increase voltage or reduce noise interference in the form of switching DC-DC and SMPS applications. It has an inductance value of 8.2μH, allowing it to be used in easily connecting inductors in noisy and DC-DC converter systems, as well as in automotive environments with high potential for noise interference. This fixed inductor can be connected either in series or parallel with the supply voltage to achieve the desired effect.

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