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1 New high permeability materials for EMI suppression leticia.leon@ferroxcube.com February 2011 February 2011

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2 High permeability materials evolution What is improved? What is new in 3E10 & 3E12? 3E10 3E12 Standard range in 3E10 &3E12 Applications Contents

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3 Permeability High permeability materials evolution 7000 3E26 10000 3E5/6 4300 3C11 6000 3E25/3E27 3E10 12000 3E12 Tighter tolerance

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4 What is improved in the common mode filter ? Higher permeability Increase coupling between windings the differential mode impedance is decreased Reduce the size of the toroid and/or the number of turns of winding less DC resistance cheaper BOM cost Larger bandwidth Extended dumping bandwidth Lower electric losses Better frequency stability Lower signal distortion Tighter inductance tolerances Less variation due to external stresses from winding and potting Better predictability More robust process and improved repeatiblity

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5 3E6 Tighter tolerance (±20%) 20% Higher permeability

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6 3E10: Process control with extended bandwidth Property3E10 Tighter tolerance in AL Lower electric losses More stability with frequency Less influence of winding and potting operations on permeability Broad damping characteristics Better process control thanks to the improvement in impedance stability with frequency and tolerance reduction Less influence of winding and potting operations on permeability Broad damping characteristics Better process control thanks to the improvement in impedance stability with frequency and tolerance reduction tan δ/μ i @ 30 kHz, 25ºC, 0.25mT < 5x 10 -6 tan δ/μ i @ 100kHz, 25ºC, 0.25mT < 20 x 10 -6 Permeability10000 ± 20% Measured on a coated toroid of Ø25xØ15xh10 We can observe that despite 3E6 higher initial permeability, from 300 kHz upwards, thanks to 3E10 better stability with frequency, extended impedance bandwidth and higher amplitude are achieved

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7 Permeability in product increases up to 20% compared to 3E6 and market equivalents 3E12: 20% permeability rise Property3E12 Reduction of negative impact of high number of turns like DC resistance and parasitic capacitance Higher permeability leads to core size or number of turns reduction Cost savings either in ferrite material or in copper Reduction of negative impact of high number of turns like DC resistance and parasitic capacitance Higher permeability leads to core size or number of turns reduction Cost savings either in ferrite material or in copper Permeability12000 ± 30%

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8 3E10 & 3E12 performance overview 3E12 achieves the highest impedance up to 300kHz 3E10 achieves the most extensive widthband Graphs show how impedance vary as a function of number of turns In all cases we observe similar behavior in 3E10 and 3E12: 3E12 higher Z at lower frequencies, whereas lower electric losses of 3E12 lead to wider bandwidth with high impedance in 3E10 Measured on coated toroids of Ø25xØ15xh10

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9 Range in 3E10 & 3E12 Standard cores in 3E10 and 3E12 are all toroid´s tools from 2.5mm to 63mm Gapped shapes reduce effective permeability, therefore the advantages obtained for these shapes in 3E10 and 3E12 materials are negligible However, shapes can be manufactured in these materials upon request Rings are the optimal shape in high permeability to reduce leakage losses Samples available

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10 Applications The main applications are interference suppression and wideband transformers: Wideband transformers Impedance transformation over a broad frequency range. Applications include impedance matching, voltage or current transformation, DC isolation, balanced/unbalanced mixing, power splitting, coupling, and signal inversion. Telecommunications devices Pulse transformers Communication systems and digital networks Ground fault interruptors (GFI) Home and industrial Interference suppression Common mode choke. Mains filters in all type of electronic equipment. ATTENTION TO HIGH GROWTH INVERTERS MARKET!!!!!!!

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11 Summary Property3E10 Permeability10000 ± 20% tan δ/μ i @ 30 kHz, 25ºC, 0.25mT < 5x 10 -6 tan δ/μ i @ 100kHz, 25ºC, 0.25mT < 20 x 10 -6 Resistivity0.5 Ohm x m Property3E12 Permeability12000 ± 30% tan δ/μ i @ 30 kHz, 25ºC, 0.25mT < 7x 10 -6 tan δ/μ i @ 100kHz, 25ºC, 0.25mT < 25 x 10 -6 Resistivity0.5 Ohm x m Property3E6 Permeability10000 ± 30% tan δ/μ i @ 30 kHz, 25ºC, 0.25mT < 10x 10 -6 tan δ/μ i @ 100kHz, 25ºC, 0.25mT < 30 x 10 -6 Resistivity0.1 Ohm x m

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12 Benchmarking American Permeability10000 Tolerance±30% Max size63 Electric losses7 Asian 1 Permeability10000 Tolerance±30% Max size65 Electric losses30 Looking at competitors’ highest permeability products we find… Asian 2 Permeability12000 Tolerance±30% Max size38 Electric losses10 Ferroxcube 3E10 Ferroxcube 3E12 Permeability 1000012000 Tolerance ±20%±30% Max size 63 Electric losses 57 57 ±20% FXC offers the tightest tolerance in high permeability the largest size with the maximum permeability 12000 63 and the lowest electric losses Taking all these factors into account, it is difficult to find such high quality product in the market

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