SMT POWER INDUCTORS For Texas Instrument Swift Series of DC/DC Converters TPS54672, TPS54610, TPS54810 and TPS54910 NEW! Height: .130"/.177” Max (PA0274/PA0277) Footprint: .28" x .26" (PA0274), .34" x .25" (PA0277) Current Range: up to 12 A Inductance Values: 475 nH and 600 nH Maximum Energy Storage Density: 2280 µJ/in3 Frequency Range: up to 2 MHz Electrical Specifications @ 25°C — Operating Temperature -40°C to +100°C Part Number PA0274 PA0277 Inductance @ Irated (nH ±20%) Irated 1 (ADC) 475 600 6.0 10.7 DCR (#1-3) (mΩ) TYP MAX 1.6 2.3 1.76 2.53 Inductance @ 0 ADC (nH ±20%) 700 700 Saturation Current 2 25°C 125°C 7 12.6 4.8 8 Heating Current 3 (A) Trise Factor 4 K0 12 12 1.40 2.04 Core Loss 4 Factor Factor K1 K2 .00638 .01276 .24632 .13196 Mechanicals PA0274 PA0277 .340 MAX 8,64 .276 MAX 7,01 1 2 PA0274 Date Code Country of Origin 4 1 .255 MAX 6,48 3 2 2X .065 1,65 3 .250 MAX 6,35 .177 MAX 4,50 .130 MAX 3,30 .010 0,25 4 PA0277 Date Code Country of Origin 2X 4X .045 1,14 .065 1,65 .296 7,52 2X .085 2,16 1 4 .150 3,81 2X 2X .031 1,79 SUGGESTED PAD LAYOUT .020 0,51 2X .010 0,25 .085 2,16 2 3 PA0274 & PA0277 4X 2X .060 1,52 .040 1,02 .075 1,91 .079 2,01 2X .099 2,51 .360 9,14 .135 3,43 2X 2X .015 0,38 .040 1,02 SUGGESTED PAD LAYOUT US 858 674 8100 • UK 44 1483 401 700 • France 33 3 84 35 04 04 • Singapore 65 287 8998 • Taiwan 886 2 2698 0228 • Hong Kong 852 2788 6588 • http://www.pulseeng.com PRELIMINARY P558.P (9/02) SMT POWER INDUCTORS For Texas Instrument Swift Series of DC/DC Converters TPS54672, TPS54610, TPS54810 and TPS54910 Notes from Tables 1. The rated current as listed is either 85% of the saturation current or the heating current depending on which value is lower. 2. The saturation current is the current which causes the inductance to drop by 30% at the stated ambient temperatures (25°C and 125°C). This current is determined by placing the component in the specified ambient environment and applying a short duration pulse current (to eliminate self-heating effects) to the component. 3. The heating current is the dc current which causes the temperature of the part to increase by approximately 40°C. This current is determined by mounting the component on a PCB with .25" wide, 2 oz. equivalent copper traces, and applying the current to the device for 30 minutes with no forced air cooling. 4. In high volt*time applications additional heating in the component can occur due to losses in the inductor which may neccessitate derating the current in order to limit the temperature rise of the component. In order to determine the approximate total losses (or temperature rise) for a given application both copper losses and core losses should be taken into account. Estimated Temperature Rise: .833 Trise = Coreloss (mW) + DCRloss (mW) Coreloss = K1 * IDC2 + dI Irms = 80 60 40 20 0 0 2 4 6 8 10 12 * (K2 * dI)2.17 (mW) 2 ½ (Arms) 2 Fsw(kHz) = switching frequency (kHz) dI = delta I across the component (A) The temperature of the component (ambient temperature + temperature rise) should be within the listed operating temperature range. Percent of Initial Inductance (%) Percent of Initial Inductance (%) 100 (Fsw(kHz))1.6688 DCRloss = Irms2 * DCR(mΩ) (mW) PA0274 Inductance vs. DC Current at 25°C 120 (°C) K0 PA0277 Inductance vs. DC Current at 25°C 120 100 80 60 40 20 0 0 2.5 5 Current (ADC) 7.5 10 12.5 15 17.5 20 Current (ADC) For More Information : UNITED STATES (Worldwide) UNITED KINGDOM (Northern Europe) FRANCE SINGAPORE (Southern Europe) (Southern Asia) TAIWAN, R.O.C. (Northern Asia) HONG KONG (China/Hong Kong) 12220 World Trade Drive San Diego, CA 92128 U.S.A. http://www.pulseeng.com TEL: 858 674 8100 FAX: 858 674 8262 1 & 2 Huxley Road The Surrey Research Park Guildford, Surrey GU2 5RE United Kingdom TEL: 44 1483 401700 FAX: 44 1483 401701 Zone Industrielle F-39270 Orgelet France TEL: 33 3 84 35 04 04 FAX: 33 3 84 25 46 41 3F-4, No. 81, Sec. 1 HsinTai Wu Road Hsi-Chih, Taipei Hsien Taiwan, R.O.C. Tel: 886 2 2698 0228 FAX: 886 2 2698 0948 19/F, China United Plaza 1008 Tai Nan West Street Cheung Sha Wan, Kowloon Hong Kong, China TEL: 852 2788 6588 FAX: 852 2776 1055 150 Kampong Ampat #07-01/02 KA Centre Singapore 368324 TEL: 65 287 8998 FAX: 65 280 0080 DISTRIBUTOR Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product names mentioned herein may be trademarks or registered trademarks of their respective owners. Printed on recycled paper. ©2002, Pulse Engineering, Inc. PRELIMINARY P558.P (9/02)