铁氧体磁芯设计手册

3www.mag-inc.com EMI/RFI FILTERS & BROADBAND TRANSFORMERSINDUCTORS & POWER TRANSFORMERS Initial Permeability µi — 900 ± 20% 2,300 ± 25% 2,500 ± 25% 3,000 ± 20% 5,000 ± 20% 10,000 ± 30% Maximum Usable Frequency (50% roll-off) f MHz <6 <1.5 <1.2 <1.3 <1 <0.25 Relative Loss Factor tan � µiac 10 -6 <8 (100kHz) <20 (100kHz) <7 (10kHz) Curie Temperature Tc ˚C >300 >230 >230 >210 >140 >125 Flux Density Bm G 5,000 5,000 4,900 4,300 4,300 @ 1,194 A/m (15 Oe) mT 500 500 490 430 430 Remanence Br G 1,100 1,100 1,200 1,000 800 mT 110 110 120 100 80 Power Loss (PL) 25kHz @25˚C 130 120 90 Sine Wave, in mW/cm3 200mT @60˚C 85 90 160 (typical) (2,000G) @100˚C 70 95 240 @120˚C 85 130 100kHz @25˚C 140 125 100 100mT @60˚C 100 90 180 (1,000G) @100˚C 70 125 225 @120˚C 90 165 500kHz @25˚C 375 300 50mT @60˚C 300 250 (500G) @100˚C 100 250 275 @120˚C 300 350 Available In: Toroids X X X X X X E, I Cores X X X X X X EFD Cores X X X X X ETD Cores X X X X EER Cores X X X X EC Cores X X X U, I, UR Cores X X X X X X Planar E, I Cores X X X X ER Cores X X X X PQ Cores X X X X Pot Cores X X X X X X RS/DS Cores X X X X X X RM Cores X X X X X X EP Cores X X X X X X MATERIAL L R P F J W