Web Sample Tools & Support Document 484-1 page & buy software & FAQ For National Semiconductor Shielded Power Inductor 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 low- voltage dc-dc converters. Custom inductance values are also possible. Request free evaluation samples by contacting Coilcraft or visiting www.coilcraft.com. Core material Ferrite Core and winding loss See www.coilcraft.com/coreloss Terminations RoHS tin-silver (96.5/3.5) over copper Weight 34.9 g Ambient temperature 40C to +85C with (40C rise) Irms current. DCR SRF Maximum part temperature +125C (ambient + temp rise). Derating. 1 2 3 4 Part Inductance max typ Isat Irms Storage temperature Component: 40C to +125C. number 10% (H) (mOhms) (MHz) (A) (A) Tape and reel packaging: 40C to +80C D1787-AL 33.0 2.8 9.0 8.0 23.0 Resistance to soldering heat Max three 40 second reflows at +260C, parts cooled to room temperature between cycles 1. Inductance measured at 100 kHz, 0.1 Vrms, 0 Adc using Coilcraft Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30C / SMD-D fixture in Agilent/HP 4284A impedance analyzer. 85% relative humidity) 2. SRF measured using Agilent/HP 8753D network analyzer and Coilcraft Packaging 25 pieces per tray SMD -D test fixture. PCB washing Tested to MIL-STD-202 Method 215 plus an additional 3. DC current at which the inductance drops 20% (typ) from its value with- aqueous wash. See Doc787 PCB Washing.pdf. out current. Click for temperature derating information. 4. Current that causes a 40C rise from 25C ambient. This information is for reference only and does not represent absolute maximum ratings. Click for temperature derating information. 5. Electrical specifications at 25C. Refer to Doc 362 Soldering Surface Mount Components before soldering. Temperature Rise vs Current 50 45 40 35 30 25 20 15 10 5 0 0 5 10 15 20 25 30 35 Current (Arms) Document 484-1 Revised 11/18/21 US +1-847-639-6400 sales coilcraft.com UK +44-1236-730595 sales coilcraft-europe.com Coilcraft Inc. 2021 This product may not be used in medical or high Taiwan +886-2-2264 3646 sales coilcraft.com.tw risk applications without prior Coilcraft approval. China +86-21-6218 8074 sales coilcraft.com.cn Specification subject to change without notice. Singapore + 65-6484 8412 sales coilcraft.com.sg Please check web site for latest information. Temperature rise (from 25C)Document 484-2 SMT Power Inductor - D1787-AL Typical L vs Frequency Typical L vs Current 1000 1000 100 100 10 10 0.1 1 10 100 0.1 1 10 100 Current (A) Frequency (MHz) 1.10 max Recommended 27,9 LandPattern Parts manufactured prior to December 2011 may be marked differently. D1787-AL 0.77 max C 1.100 L 19,6 max 27,94 XXXXY 0.455 11,56 0.220 5,59 0.160 0.240 0.210 0.190 4,06 6,10 5,33 4,83 0.655 max 16,6 0.004/0,102 0.150 3,8 inches 0.270 Dimensions are in mm 6,9 Document 484-2 Revised 11/18/21 US +1-847-639-6400 sales coilcraft.com UK +44-1236-730595 sales coilcraft-europe.com Coilcraft Inc. 2021 This product may not be used in medical or high Taiwan +886-2-2264 3646 sales coilcraft.com.tw risk applications without prior Coilcraft approval. China +86-21-6218 8074 sales coilcraft.com.cn Specification subject to change without notice. Singapore + 65-6484 8412 sales coilcraft.com.sg Please check web site for latest information. Inductance (H) Inductance (H)