SMD transformersE10 EM seriesB78307A*A003Preliminary data Characteristics and ordering codes Topologies Turns ratio L 4 5 N1 Lleak,typ, N1 Isat,N1 E*dtN1 RDC,N1 RDC,N2 Cp Fig. Ordering code N1/N2 (max, N1/N2 unipolar/ bipolar) µH µH A µVs mΩ mΩ pF B1, B2 1 : 1.08 ≥ 100 0.35 - 15 / 30 350 410 9 F1 B78307A2276A003 B1, B2 1 : 0.76 ≥ 100 0.45 - 18 / 36 360 300 9 F1 B78307A9741A003 B1, B2 1 : 3.67 ≥ 10 0.1 - 10 / 20 200 700 6 F2 B78307A2385A003 B3,B4 1 : 4 2 ±10% 0.06 4 - 105 340 4 F3 B78307A2338A003(3 B3,B4 4 : 1 25 ±10% - 1 - - - 4 F4 B78307A2338A003 (3 1) T≤150 °C, B�= 200 mT, ΔB= 400 mT (bipolar mode). The maximum volt-sec rating limits the peak flux density to B�= 200 mT when used in a unipolar drive application. For bipolar drive applications, a maximum volt-sec of two times is acceptable (ΔB 400 mT). 3) B78307A2238A003 Configuration 1 : 4 use pins 8-5 for primary; Configuration 4 : 1 use pins 2-3 for primary Circuit diagram Fig. F1 F2 Fig. F3 F4 4 T≤150 °C, L drop ≤20% 5 T≤150 °C, B�= 200 mT, ΔB= 400 mT (bipolar mode). The maximum volt-sec rating limits the peak flux density to B�= 200 mT when used in a unipolar drive application. For bipolar drive applications, a maximum volt-sec of two times is acceptable (ΔB 400 mT) MAG TF T PD 2020-05-06 Please read Cautions and warnings and Page 5 of 9 Important notes at the end of this document.