US 12,237,767 B2
Inductor component, DC-DC converter, and method for manufacturing inductor component
Yoshimasa Yoshioka, Nagaokakyo (JP); and Naoya Noo, Nagaokakyo (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed on Nov. 2, 2021, as Appl. No. 17/517,584.
Claims priority of application No. 2020-184991 (JP), filed on Nov. 5, 2020.
Prior Publication US 2022/0140730 A1, May 5, 2022
Int. Cl. H01F 5/00 (2006.01); H01F 17/00 (2006.01); H01F 17/04 (2006.01); H01F 27/28 (2006.01); H01F 41/02 (2006.01); H02M 3/158 (2006.01)
CPC H02M 3/158 (2013.01) [H01F 17/0013 (2013.01); H01F 17/04 (2013.01); H01F 27/2823 (2013.01); H01F 41/0246 (2013.01); H01F 2017/048 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An inductor component comprising:
a body containing metal magnetic powder containing an iron element; and
an inductor in the body and having both ends exposed from the body,
in a DC superposition characteristic curve represented as a value for a DC bias current superimposed on an alternating current of 100 MHz flowing through the inductor, when a horizontal axis represents a value of the DC bias current, and a vertical axis represents a relative value of an inductance in a case where a value of the inductance generated when the value of the DC bias current is 0 A is set to 1,
a steady region is defined as a region in which a fluctuation on the vertical axis is within 0.1 over an interval width of 0.3 A or more on the horizontal axis,
a transition region is defined as a region in which a fluctuation on the vertical axis exceeds 0.1 in an interval width of less than 0.3 A on the horizontal axis, and
in the DC superposition characteristic curve, a first steady region and a second steady region are present as the steady region, and the transition region is present between the first steady region and the second steady region.