DD1217AS-H-8R2M=P3 Inductors, Coils, Chokes

Series:	DEM8045C
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Wirewound
Material - Core:	Ferrite
Inductance:	8.2µH
Tolerance:	±20%
Current Rating:	4.5A
Current - Saturation:	6.4A
Shielding:	Shielded
DC Resistance (DCR):	33.6 mOhm Max
Q @ Freq:	--
Frequency - Self Resonant:	--
Ratings:	--
Operating Temperature:	--
Inductance Frequency - Test:	100kHz
Mounting Type:	Surface Mount
Package / Case:	Nonstandard
Size / Dimension:	0.315" L x 0.315" W (8.00mm x 8.00mm)
Height - Seated (Max):	0.177" (4.50mm)

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Fixed InductorsA fixed inductor is an inductor with a permanent inductance. Inductors are widely used in many electric and electronic circuit designs to store energy in the form of magnetic fields. They are also used to create oscillators in high-frequency applications, to filter out certain frequencies in a series of signals, and to provide shielding for high-frequency circuits. The DD1217AS–H–8R2M=P3 is a fixed inductor that is designed for high-current DC-DC converter applications.Application Field The DD1217AS–H–8R2M=P3 is designed for high-current DC-DC converter applications. It is a multi-layer inductor which is designed with high-grade ferrite cores, and comes in a miniature package that is only 6.4mm by 5.2mm. It has been developed specifically for synchronous buck converters that operate at high frequencies such as 4kHz and 5kHz, making it ideal for modern high-frequency switching power supplies. This inductor also has high current capability, up to 8.2A of DC current.Working Principle The working principle of the DD1217AS–H–8R2M=P3 is relatively simple. The inductor is a coil of wire wound around a magnetic core, made of ferrite. The magnetic core provides a path for the magnetic flux created by the current running through the coil. This magnetic flux will induce a voltage in the coil that is proportional to the rate of change of the current passing through it. This is known as Faraday’s Law of Induction. This induced voltage opposes the current, so the current will decrease over the inductor, and the voltage will increase. This means that the inductor can act as a filter, limiting the current and providing a smooth transition of power between the source and load. The inductor is also used as part of a power converter, because it will store energy in the form of a magnetic field and release it as current when the load demands it. This makes them essential components of synchronous buck converters, which need to provide both high conversion efficiency and maintain a regulation voltage for the output.

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