Document 130 Base/Gate Driver Transformers • Lower cost than toroidal equivalents • Frequency range of 10 - 250 kHz and up • Industry standard pin centers • VDE, IEC, UL, CSA compliant • 3750 Vrms isolation between windings • Constructed with UL approved Class 130°C insulation system (UL File E83628) Turns ratio (pri : sec) Primary winding Inductance (min)1 Leakage inductance (max)1 DCR Volt-time product SD250-1L 1:1 SD250-2L 1 : 1.5 SD250-3L 1:1:1 SD250-4L 1 : 1.5 : 1.5 SD250-1 and 250-2 10 1 1.5 mH 4.0 µH 0.4 ⏲ 375 V-µsec 1.5 mH 4.0 µH 0.4 ⏲ 375 V-µsec 1.5 mH 4.0 µH 0.4 ⏲ 375 V-µsec 1.5 mH 4.0 µH 0.4 ⏲ 375 V-µsec 50 pF 0.75 ⏲ 50 pF 2.5 ⏲ 50 pF 0.75 ⏲ 50 pF 2.5 ⏲ Secondary winding(s) Capacitance, pri to sec (max) DCR, each section (max) Pri (drive) Sec 6 5 SD250-3 and 250-4 7 Sec 1 1 Pri (drive) 6 10 5 Sec 2 1. Measured at 1 Vrms, 15.75 kHz. 2. Operating temperature range –40°C to +85°C. 3. Electrical specifications at 25°C. 9 Recommended board layout 1 0.75 19,05 5 1.10 max 27,94 0.950 max 24,13 5 0.62 ±0.015 15,75 ±0,38 0.395 max 10,03 6 10 0.15 ±0.030 3,81 ±0,762 Weight: Termination: Packaging: 0.032 dia ref 0,813 9 7 6 1.10 max 27,94 0.20 5,08 7 9 10 0.044 dia 1,12 0.40 10,16 0.80 20,32 Pins 7 and 9 are not present on SD250-1 and SD250-2 15.6 – 16.8 g Tin-silver over tin over copper 49 per tray Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2006 1 Document 130 Revised 10/26/06