Document 684-1 Shielded Power Inductor For NSC LM315x simple switcher® • Designed specifically for National Semiconductor LM315x SIMPLE SWITCHER® 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 Part number1 Inductance2 DCR ±8% SRF typ3 Isat4 Irms5 ±20% (µH) (mOhm) (MHz) (A) (A) HA3778-AL_ 1.65 2.53 55 17 20 Core material Powdered iron Terminations RoHS compliant tin-silver over copper. Other terminations available at additional cost. Weight 3.44 g Ambient temperature –40°C to +85°C with Irms current, +85°C to +125°C with derated current Storage temperature Component: –40°C to +125°C. Packaging: –40°C to +80°C Resistance to soldering heat Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C / 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 1. When ordering, please specify termination and packaging codes: HA3778-ALC = 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 40°C temperature rise from 25°C ambient. 6. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. Termination: L Dimensions are in inches mm US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Document 684-1 Revised 09/16/11 © Coilcraft Inc. 2012 This product may not be used in medical of high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check out web site for latest information. Document 684-2 Shielded Power Inductor – HA3778-AL Inductance vs Frequency 3.0 3.0 2.5 2.5 Inductance (µH) Inductance (µH) Inductance vs Current 2.0 1.5 1.65 µH 1.0 1.5 1.65 µH 1.0 0.5 0.5 0 2.0 0.1 10 1 0 100 0.1 Current Derating 120 110 70 100 1.65 µH 50 40 30 20 10 90 80 70 60 50 40 30 20 10 0 0 5 10 15 20 25 30 35 25°C Percent of rated current Temperature rise (from 25°C) 80 0 100 Frequency (MHz) Temperature Rise vs Current 60 10 1 Current (A) Isat Irms -40 -20 0 Current (A rms) US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] 20 40 60 80 100 120 140 Ambient temperature (°C) Document 684-2 Revised 09/16/11 © Coilcraft Inc. 2012 This product may not be used in medical of high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check out web site for latest information.