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| Document 684-1 Shielded Power Inductor For NSC LM315x SIMPLE SWITCHER(R) * Designed specifically for National Semiconductor LM315x SIMPLE SWITCHER(R) Controllers for applications with output current up to 12 A. * L1 on NSC Demonstration Board LM3152-3.3 * Soft saturation makes it ideal for use in multi-phase VRM/VRD regulators and high current/high frequency DC/DC converters. * Flat wire construction for low DCR * The materials used eliminate all thermal aging issues Core material Powdered iron Terminations RoHS compliant tin-silver over copper. Other terminations available at additional cost. Weight 3.44 g Ambient temperature -40C to +85C with Irms current, +85C to +125C with derated current Storage temperature Component: -40C to +125C. Packaging: -40C to +80C Resistance to soldering heat Max three 40 second reflows at +260C, parts cooled to room temperature between cycles Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30C / 85% relative humidity) Mean Time Between Failures (MTBF) 26,315,789 hours Packaging 100/7 reel; 500/13 reel Plastic tape: 24 mm wide, 0.4 mm thick, 16 mm pocket spacing, 7.5 mm pocket depth PCB washing Only pure water or alcohol recommended Part number1 HA3778-AL_ Inductance2 DCR 8% 20% (H) (mOhm) 1.65 2.53 SRF typ3 Isat4 Irms5 (MHz) (A) (A) 55 17 20 1. When ordering, please specify termination and packaging codes: HA3778-ALC Termination: L = RoHS compliant tin-silver over copper. Special order: T = RoHS tin-silver-copper (95.5/4/0.5) or S = non-RoHS tin-lead (63/37). Packaging: C = 7 machine-ready reel. EIA-481 embossed plastic tape (100 parts per full reel). B = Less than full reel. In tape, but not machine ready. To have a leader and trailer added ($25 charge), use code letter C instead. D = 13 machine-ready reel. EIA-481 embossed plastic tape. Factory order only, not stocked (500 parts per full reel). 2. Inductance measured at 500 kHz, 0.1 Vrms, 0 Adc using a Coilcraft SMD-A fixture in an Agilent/HP 4284A LCR meter or equivalent. 3. SRF measured on an Agilent/HP 8753ES. 4. DC current at which the inductance drops 30% (typ) from its value without current. 5. Current that causes a 40C temperature rise from 25C ambient. 6. Electrical specifications at 25C. Refer to Doc 362 "Soldering Surface Mount Components" before soldering. HA3778-AL 0.369 typ 9,38 0.384 max 9,75 0.262 typ 6,65 0.280 max 7,10 Finish 0.223 0.012 5,67 0,30 Start 0.069 0.002 1,75 0,05 CCIxxxx 0.448 typ 11,37 0.453 max 11,50 Recommended Land Pattern 0.336 0.010 8,53 0,25 0.375 9,53 Dimensions are in inches mm 0.100 2,54 0.211 5,37 Specifications subject to change without notice. Please check our website for latest information. Document 684-1 Revised 10/16/08 (c) Coilcraft, Inc. 2008 Document 684-2 Shielded Power Inductor - HA3778-AL Inductance vs Current 3.0 2.5 Inductance vs Frequency 3.0 2.5 Inductance (H) 2.0 1.5 1.0 0.5 0 0.1 1 10 100 Inductance (H) 2.0 1.5 1.0 0.5 0 0.1 1 10 100 1.65 H 1.65 H Current (A) Frequency (MHz) Temperature Rise vs Current 80 Current Derating 120 110 Temperature rise (from 25C) Percent of rated current 70 60 50 40 30 20 10 0 0 5 10 15 20 25 30 35 1.65 H 100 90 80 70 60 50 40 20 10 0 -40 25C 30 Isat Irms -20 0 20 40 60 80 100 120 140 Current (A rms) Ambient temperature (C) Specifications subject to change without notice. Please check our website for latest information. Document 684-2 Revised 10/16/08 (c) Coilcraft, Inc. 2008 |
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