Patent ID: 7623014

Claim:
An optimized choke coil, comprising: a magnetic core having a first permeability which is from about 350 to about 1200, wherein: the magnetic core is a drum core comprising an upper core, a middle core, and a lower core; the upper core and the lower core have a same first width and a same first thickness; the middle core has a second width, wherein a ratio of the second width to the first width is from about 0.367 to about 0.667; and the middle core has a second thickness, wherein a ratio of the first thickness to the second thickness is from about 0.3 to about 0.667; a coil wrapped around said magnetic core; a magnetic material surrounding said coil and having a second permeability which is from about 5 to about 30; and an electrode portion connected to one end of said coil, wherein the choke coil has a saturation current greater than 160 mA.