(1/71) Ferrite For Switching Power Supplies TECHNICAL DATA EI Cores (EI12.5 to EI60) EE Cores (EE10/11 to EE62.3/62/6) EER Cores (EER25.5 to EER42/42/20) ETD Cores (ETD19 to ETD49) PQ Cores (PQ20/16 to PQ50/50) LP Cores (LP23/8 to LP32/13) RM Cores (RM4 to RM14) EPC Cores (EPC13 to EPC30) ? All specifications are subject to change without notice. 001-02 / 20031114 / e148.fm 张飞实战电子官方网站：zhangfeidz? 点击打开 (2/71) EI Series EI12.5 Cores(JIS FEI 12.5) Parameter Core factor C1 mm–1 1.48 Effective magnetic path length Effective cross-sectional area Effective core volume Cross-sectional center leg area Minimum cross-sectional area Cross-sectional winding area of core Weight (approx.) e mm mm2 mm3 mm2 21.3 14.4 308 11.6 10.8 17.3 1.9 Ae Ve Acp Acp min. mm2 Acw mm2 g 2.3 5.1?0.1 4.85?0.15 4.85?0.15 1.5?0.1 7.4?0.1 Dimensions in mm Core loss (W) at 100°C 100kHz, 200mT Calculated output power (forward converter mode) Part No. AL-value (nH/N2) 1200±25% (1kHz, 0.5mA)? 2120 min. (100kHz, 200mT) PC40EI12.5-Z 0.12 max. 8.8W (100kHz) ?? Coil: ?0.2 2UEW 100Ts NI limit vs. AL-value for AL-value vs. Air gap length for Temperature rise vs. Total loss for EI12.5 core (Typical) PC40EI12.5 gapped core (Typical) PC40EI12.5 core (Typical) (Ambient temperature: 25°C) 100 Temperature: 100?C 40% Center leg gap 102 102 20% 50 Spacer gap 101101 102 AL-value(nH/N2) 101 00 0.1 Air gap length(mm) 1 0.2 0.4 0.6 0.8 Total loss Pm(W)