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| Document 484-1 SMT Power Inductor For National Semiconductor LM5115 DC Controller IC The D1787-AL was developed for use with the National Semiconductor LM5115 Secondary Side Post Regulator Controller and LM5025 Primary Side Controller. This flat wire power inductor offers extremely low dc resistance and very high current ratings (up to 23 Arms). The flat core allows for exceptional heat dissipation and provides an excellent surface for pick and place operation. This inductor is ideal for power supply applications where high current handling is essential and is perfect for lowvoltage dc-dc converters. Custom inductance values are also possible. Request free evaluation samples by contacting Coilcraft or visiting www.coilcraft.com. Part number D1787-AL DCR SRF Inductance1 max typ2 10% (H) (mOhms) (MHz) 33.0 2.8 9.0 Isat3 Irms 4 (A) (A) 8.0 23.0 Temperature Rise vs Current 30 1. Inductance measured at 100 kHz, 0.1 Vrms, 0 Adc using Coilcraft SMD-D fixture in Agilent/HP 4284A impedance analyzer. 2. SRF measured using Agilent/HP 8753D network analyzer and Coilcraft SMD-D test fixture. 3. DC current at which the inductance drops 20% (typ) from its value without current. 4. Average current for a 40C rise above 25C ambient. 5. Operating temperature range -40C to +85C. 6. Electrical specifications at 25C. See Qualification Standards section for environmental and test data. Temperature rise (from 25C) 25 20 15 10 5 0 0 5 10 15 20 25 Current (A rms) Specifications subject to change without notice. Please check our website for latest information. Document 484-1 Revised 11/09/06 (c) Coilcraft, Inc. 2006 Document 484-2 SMT Power Inductor - D1787-AL Typical L vs Frequency 1000 Typical L vs Current 1000 Inductance (H) 100 Inductance (H) 100 10 0.1 1 10 100 10 0.1 1 10 100 Frequency (MHz) Current (A) 1.10 max 27,9 Recommended Land Pattern 1.100 max 27,94 COILCRAFT D1787-AL CCI0525 0.77 max 19,6 0.455 11,56 0.220 5,59 C L 0.160 4,06 0.240 6,10 0.210 5,33 0.190 4,83 0.655 max 16,6 0.004/0,102 0.150 3,8 0.270 6,9 Terminations: Tin-silver over copper Weight: 34.9 g Packaging: 25 pieces per tray Specifications subject to change without notice. Please check our website for latest information. Document 484-2 Revised 11/09/06 (c) Coilcraft, Inc. 2006 |
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