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| Optimized Design of Low Voltage High Current Ferrite Planar Inductor for 10 MHz On-chip Power Module |
| Journal of Magnetics, Volume 13, Number 2, 30 Jun 2008, Pages 37-42 |
Seok Bae(Department of Electrical and Computer Engineering, University of Alabama), Yang-Ki Hong*  (Department of Electrical and Computer Engineering, University of Alabama), Jae-Jin Lee(Department of Electrical and Computer Engineering, University of Alabama), Gavin Abo(Department of Electrical and Computer Engineering, University of Alabama), Jeevan Jalli(Department of Electrical and Computer Engineering, University of Alabama), Andrew Lyle(Department of Electrical and Computer Engineering, University of Alabama), Hong-Mei Han(Department of Electrical and Computer Engineering, University of Alabama), Gregory W. Donohoe(Department of Electrical and Computer Engineering, University of Idaho) |
| Abstract |
| In this paper, design parameters of high Q (> 50), high current inductor for on-chip power module were optimized by 4 Xs 3 Ys DOE (Design of Experiment). Coil spacing, coil thickness, ferrite thickness, and permeability were assigned to Xs, and inductance (L) and Q factor at 10 MHz, and resonance frequency (fr) were determined Ys. Effects of each X on the Ys were demonstrated and explained using known inductor theory. Multiple response optimizations were accomplished by three derived regression equations on the Ys. As a result, L of 125 nH, Q factor of 197.5, and fr of 316.3 MHz were obtained with coil space of 127㎛, Cu thickness of 67.8㎛ , ferrite thickness of 13.3㎛ , and permeability 156.5. Loss tan δ=0 was assumed for the estimation. Accordingly, Q factor of about 60 is expected at tan δ=0.02. |
| Keywords: DC-DC converter; DOE; ferrite inductor; Ni-Zn-Cu ferrite; on-chip power module; optimization |
| DOI: 10.4283/JMAG.2008.13.2.37 |
| Full Text: PDF |
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