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| MINIATURE SURFACE MOUNT POWER INDUCTORS Reliable self-leaded design Very small size and cost-effective High energy storage and low DC resistance Ideal for DC/DC conversion in notebook computers, PDAs, step-up or step-down converters Electrical Specifications @ 25C -- Operating Temperature -40C to +130C Pulse Part Number IDC (amp) Reference Values L @ IDC MIN (H) ET (V-sec) Control Values DCR L W/O DC 15% 15% (m) (H) Calculation Data ET10 (V-sec) ROS 1 P0430T P0431T P0432T P0433T P0434T P0435T P0436T P0437T P0438T P0439T P0440T P0441T P0442T P0443T P0444T P0445T P0446T 2.00 1.90 1.50 1.20 1.20 1.00 0.70 0.60 0.50 0.45 0.34 0.29 0.24 0.20 0.17 0.16 0.14 5 5 5 5 3 2.5 2 1.8 1.5 1.3 1 0.9 0.8 0.6 0.5 0.4 0.35 0.3 0.25 0.51 0.76 0.85 1.44 1.87 2.72 4.33 5.35 8.84 10.79 17.59 25.50 35.80 52.70 79 88 127 0.51 0.67 1.09 1.53 1.78 3.74 4.76 5.61 9.09 11.47 22.95 39.10 40.80 69.70 76.50 137 182 272 357 0.8 0.8 1.2 1.8 1.8 2.3 3.1 3.3 4.4 5.0 6.5 8.4 9.8 12 14 15 18 3.0 3.1 0.5 1.0 7.5 10.5 13 14 15 21 31 39 35 55 54 78 87 105 130 0.7 1.1 1.1 1.9 2.6 3.9 6.0 7.1 12.2 14.7 23.8 33.8 49 72 110 122 179 0.64 0.86 1.5 2.3 2.3 5.13 6.3 7.5 13.2 15.5 34 57.2 62.5 100 103 180 254 380 500 14 18 18 28 34 40 73 100 140 155 250 280 440 650 1050 1065 1600 7.6 8.7 11.4 13 15 23 26 33 70 60 90 123 240 245 305 481 682 1030 1200 476.2 370.4 370.4 277.8 238.1 196.1 158.7 144.9 111.1 101.0 79.4 66.7 55.6 45.7 37.0 35.1 29.0 181.8 151.5 113.6 90.9 90.9 60.6 56.8 50.5 39.5 35.0 24.6 18.9 18.2 14.0 14.2 10.0 8.7 7.0 6.1 ROS 2 P0450T P0451T P0452T P0453T P0454T P0455T P0456T P0457T P0458T P0459T P0460T P0461T P0462T P0463T P0464T P0465T P0466T P0467T P0468T 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 PC500.B (5/02) 18 MINIATURE SURFACE MOUNT POWER INDUCTORS Notes: 1. Temperature rise is 55 C in typical buck or boost circuits with the rated IDC current and reference ET applied to the inductor. 2. Total loss in the inductor is 80 mWatts (ROS 1) and 280 mWatts (ROS 2) for 55C temperature rise above ambient. 3. To estimate temperature rise in a given application, you must determine the total losses (copper losses + core losses) and apply the following formula: ROS 1: TempRise (C) = (Total Losses (mW)).833 x 1.45 ROS 2: TempRise (C) = (Total Losses (mW)).833 x .508 4. To determine copper losses, calculate: CopperLoss (mW) = IDC2 x DCR 5. For core loss in mWatts, using frequency f (in Hz) and operating flux density B (in Gauss), calculate: ROS 1: CopperLoss (mW) = .127 x 10-10 x f1.26 x B2.11 ROS 2: CopperLoss (mW) = .887 x 10-10 x f1.26 x B2.11 6. For flux density (B), calculate ET (V-sec) for the application, and multiply by ET10 factor from the table. Mechanical Schematic MAX A G F MAX 1 B E F Suggested Pad Layout 2 C D Dimensions: Inches mm Unless otherwise specified, all tolerances are .010 0,25 PKG ROS 1 ROS 2 A .335 8,51 .545 13,84 B .225 5,72 .390 9,91 C .125 3,18 .215 5,46 D .250 6,35 .440 11,18 E .100 2,54 .120 3,05 F .050 1,27 .065 1,65 G .250 6,35 .440 11,18 ROS 1 ROS 2 Weight ....................0.29 grams .............1.1 grams Tape & Reel ...............2000/reel ................600/reel 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 19 PC500.B (5/02) |
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