CO M & PL AE IA C NT, CO * M *HA PL L IA OG NT EN FR EE AE C C OM AP P PR OV Applications dual-inductor and transformer n Magnetically shielded, low radiation n Inductance range: 0.47 to 4000 H 7.6 n(.299) Rated current up to 17.9 A MAX. n AEC-Q200 compliant n RoHS compliant* and halogen free** n Power supplies n Multiple applications: parallel, series, 7.6 MAX. (.299) 101 *R oH S Features n DC/DC converters n SEPIC - DC/DC converters SRF1280A Series - Dual-Winding Shielded Power Inductors 3.4 0.2 (.134 .008) Electrical Specifications @ 25 C General Specifications 2.9 TYP. (.114) Parallel Rating 4 3 Inductance DCR Inductance Bourns @ 100 KHz Tol. (W) Irms Isat @ 100 KHz Part No. L (mH) (%) Max. (A) (A) L (mH) 2.7 30 SRF1280A-R47Y 0.47 0.0055 17.9 56 1.88 (.106) SRF1280A-1R0Y 1.0 0.0067 15.5 40 4 TYP. 30 SRF1280A-1R5Y 1.5 30 0.0076 13.5 31.1 6 SRF1280A-2R2Y 2.2 30 0.0092 12.5 25.5 8.8 SRF1280A-3R3Y 3.3 30 0.011 13.2 1 2 10.41.0 21.5 SRF1280A-4R7Y 4.7 30 0.0135 8.25 16.5 18.8 TYP. (.039) SRF1280A-6R8Y 6.8 30 0.0183 7.34 13.3 27.2 SRF1280A-8R2Y 8.2 12.50 30 12.50 0.0191 6.32 12.2 32.8 MAX. MAX. SRF1280A-100M 10 (.492) 20 (.492) 0.0241 6.04 11.2 40 SRF1280A-150M 15 20 0.0333 5.03 9.66 60 DOT DOT 0.4 0.4 3.0 SRF1280A-220M 22 20 0.0503 4 7.57 88 (.016) (.016) INDICATES INDICATES (.118) SRF1280A-330M 33 20 0.0664 3.23 6.22 132 TERMINAL 1 TERMINAL 1 12.502.95 12.50 SRF1280A-470M 20 2 0.0898 188 2 147 15.28 SRF1280A-680M 68 20 0.123(.492)2.44 (.492) 4.44 272 MAX. MAX. SRF1280A-820M 82 20 0.153 2.09 4.06 328 7.9 (.311) 1.96 SRF1280A-101M 100 20 0.175 3.64 400 SRF1280A-151M 150 20 0.261 1.59 3.01 600 4 4 3 3 SRF1280A-221M 220 20 0.343 1.29 2.43 880 1.4 1.4 SRF1280A-331M 330 20 0.54 1.04 2.01 1320 (.055) (.055) SRF1280A-471M 470 20 0.865 0.85 1.68 1880 DUAL INDUCTOR MODE SERIES MODE 8.00 SRF1280A-681M 680 20 1.296 8.00 0.76MAX.1.39 2720 MAX. (.315) (.315) SRF1280A-821M 820 20 1.632 0.65 1.27 3280 SRF1280A-102M 1000 20 1.992 0.61 1.14 4000 Electrical Schematic 4 5.00 0.3 5.00 0.3 (.197 .012) (.197 .012) 1 2 N1 3 Tol. (%) 30 30 30 30 30 30 30 30 20 20 3.0 20 (.118) 20 20 20 7.9 20 (.311) 20 20 20 20 20 20 20 20 DCR (W) Max. 0.0216 0.026 0.0306 0.0338 0.04 0.05 0.0656 0.0714 0.0921 0.129 0.192 0.265 0.353 0.469 0.578 0.701 1.013 1.38 2.172 3.3 4.888 5.896 7.202 Irms (A) 8.94 7.74 6.77 6.23 5.23 4.13 3.67 3.16 3.02 2.51 2 1.61 1.47 1.22 1.04 0.98 0.796 0.645 0.522 0.427 0.38 0.325 0.307 Isat (A) 28 20 15.6 12.7 10.8 8.24 6.67 6.09 5.6 4.83 3.78 3.11 2.64 2.22 2.03 1.82 1.51 1.22 1.01 0.838 0.697 0.633 0.571 Test Voltage...................................0.25 V Operating Temperature .................................-40 C to +125 C (Temperature rise included) Storage Temperature .................................-40 C to +125 C Resistance to Solder Heat .............................. +245 C for 10 sec. Temperature Rise ........................40 C typ. at rated Irms Inductance drop....................30 % at Isat Hi-pot (N1-N2).................500 Vac/60 Hz, 3 mA, 1 sec Moisture Sensitivity Level......................1 ESD Classification (HBM)................. N/A Materials Core...............................................Ferrite Wire.............................Enameled copper Terminal Finish....................................Sn Packaging..................... 400 pcs. per reel Product Dimensions 12.50 MAX. (.492) DOT INDICATES TERMINAL 1 12.50 (.492) MAX. 5.00 0.3 5.00 0.3 (.197 .012) (.197 3 4 .012) 1 N2 Series Rating 2 N1 1 N2 2 N1 N2 8.00 MAX. (.315) 41 3 2 2 13 0.2 1.80 0.2 4 1.80 (.071 .008) (.071 .008) 4 3 PARALLEL SERIES Recommended Layout 1 4.50 (.177) 4.50 (.177) 2.15 (.085) 2.15 (.085) 12 2 4 43 2.15 (.085) 2.15 (.085) 1 12 3 1.28 (.050) DUAL MODE INDUCTOR MODE DUAL INDUCTOR 4.50 (.177) DIMENSIONS: 4.50 (.177) 4 34 1.28 (.050) 1.28 (.050) 4 3 1 2 MM (INCHES) 2 13.00 (.512) 13.00 (.512) 13.00 (.512) 13.00 (.512) 1.28 (.050) 5.00 0.3 (.197 .012) 5.00 0.3 (.197 .012) 1.80 0.2 (.071 .008) 3 SERIES MODE SERIES MODE DIMENSIONS: 2.15 (.085) 4.50 (.177) MM (INCHES) 2.15 (.085) WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov 4.50 (.177) 1 2 1 2 * RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. ** Bourns follows the prevailing definition of "halogen free" in the industry. Bourns considers a product to be "halogen free" if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br) and 13.00Chlorine (Cl) content is 1500 ppm or less. 13.00 Specifications are subject to change without notice. (.512) (.512) Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 4 3 4 3 1.28 (.050) 1.28 (.050) SRF1280A Series - Dual-Winding Shielded Power Inductors Inductance vs. IDC SRF1280A-470M L @ 25 C 50.0 SRF1280A-681M L @ 125 C 800.0 40.0 SRF1280A-102M L @ 125 C 400.0 600.0 200.0 10.0 0.0 0.0 1.1 2.2 3.3 300.0 0.0 0.0 4.4 L @ 125 C 900.0 L (H) L (H) 20.0 L @ 25 C 1200.0 600.0 30.0 L (H) L @ 25 C 0.3 0.6 0.9 0.0 0.0 1.2 0.2 0.4 IDC (A) IDC (A) 0.6 0.8 1.0 0.80 1.00 IDC (A) Temperature Rise vs. IDC SRF1280A-470M 100.0 SRF1280A-102M T @ 25 C 100.0 80.0 60.0 60.0 60.0 40.0 20.0 20.0 0.0 T (C) 80.0 40.0 0.0 1.13 2.25 3.38 4.50 0.0 T @ 25 C 100.0 80.0 T (C) T (C) SRF1280A-681M T @ 25 C 40.0 20.0 0.0 IDC (A) 0.28 0.55 0.83 1.10 0.0 0.0 0.20 0.40 0.60 IDC (A) IDC (A) How to Order Soldering Profile Temperature Rising Area Preheat Area +4.0 C / sec. max. 150~200 C / 60~120 sec. Reflow Area SRF1280A - 100M Forced Cooling Area +3.0 C / sec. max. Model -(1.0~5.0) C / sec. max. Value Code (see table) 250 Temperature (C) 217 C 60 ~ 150 sec. 60 sec. max. 200 150 Time Above 245 C: 30 sec. max. 60 ~ 120 sec. 100 Time Above 217 C: 60 ~ 150 sec. max. 50 0 Peak Temperature: 245 C max. 50 100 150 200 250 Time (Seconds) Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. SRF1280A - Dual-Winding Power Inductors 3312 - 2 Series mm SMD TrimmingShielded Potentiometer Packaging Specifications 330 DIA. (12.99) 2.0 0.5 (.079 .020) 21.0 0.8 (.827 .031) 30.4 (1.197) 13.0 0.5 (.512 .020) DIA. 50.0 -0 (1.97 -0) 13.0 DIA. (.512) 24.0 (.945) 26 +0 (1.024 +0) 20.0 (.787) END NO COMPONENT 200 (7.87) 4.0 (.157) COMPONENTS START NO COMPONENT 400 (15.75) USER DIRECTION OF FEED QTY: 400 PCS. PER REEL DIMENSIONS: MM (INCHES) REV. 11/18 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. Legal Disclaimer Notice This legal disclaimer applies to purchasers and users of Bourns(R) products manufactured by or on behalf of Bourns, Inc. and its affiliates (collectively, "Bourns"). Unless otherwise expressly indicated in writing, Bourns(R) products and data sheets relating thereto are subject to change without notice. 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