SMT POWER INDUCTORS Volta-5 Series Height: .280" Max Footprint: .51" x .51" Current Range: up to 40 Arms Typical Energy Storage: 120 µJ Typical Energy Storage Density: 2640 µJ/in3 Frequency Range: 100 kHz to 2 MHz Electrical Specifications @ 25°C — Operating Temperature -40°C to +125°C Hookup Inductance @ Irated (nH ±20%) Irated1 (ADC) DCR (mΩ TYP) PA0135.331T Series 297 20 PA0135.331T Parallel 74 40 PA0135.471T Series 423 20 PA0135.471T Parallel 105 PA0135.681T Series 612 PA0135.681T Parallel 153 PA0135.102T Series PA0135.102T Parallel Part Number DCR (mΩ MAX) Inductance @ 0 ADC (nH ±20%) Saturation Current2 @ -40°C(A) Saturation Current2 @ 25°C(A) Saturation Current2 @ 125°C(A) Heating Current3 (A) .74 .90 330.0 40+ .18 .225 82.5 40+ 40+ 32 20 6.38037 0.02566 0.03094 Fig. 1 40+ 40+ 40 6.38037 0.02566 0.01547 .74 .90 470.0 Fig. 2 37 35 26 20 6.38037 0.02566 0.04407 Fig. 1 40 .18 .225 19 .74 .90 117.5 40+ 40+ 40+ 40 6.38037 0.02566 0.02204 Fig. 2 680.0 26 25 19 20 6.38037 0.02566 0.06377 34 .18 .225 Fig. 1 170.0 40+ 40+ 34 40 6.38037 0.02566 0.03188 Fig. 2 900 14 .74 225 24 .18 .90 1000.0 19 18 14 20 6.38037 0.02566 0.09377 Fig. 1 .225 250.0 36 35 24 40 6.38037 0.02566 0.04689 Fig. 2 Trise4 Core Loss4 Core Loss4 Outline & (Factor K0) (Factor K1) (Factor K2) PCB Layout Schematic Mechanical PA0135.XXXXT .300 7,62 .510 MAX 12,95 4 .510 MAX 12,95 .300 7,62 .140 ) (2X 3,56 3 .250 6,35 PA0135.XXXXT .550 13,97 .250 6,35 .550 13,97 Date Code Country of Origin 1 2 SUGGESTED PAD LAYOUT (Series Configuration) .170 MAX 4,32 2 4 3 1 2 4 3 Series Hookup SUGGESTED PAD LAYOUT (Parallel Configuration) .280 MAX 7,11 .120 MAX 3,05 1 Weight . . . . . . . 4.15 grams Tape & Reel . . . . . . 500/reel Dimensions: Inches mm Unless otherwise specified, all tolerances are ± .010 0,25 .125 ) (2X 3,18 1 2 4 3 Parallel Hookup 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) 30 SMT POWER INDUCTORS Volta-5 Series Notes from Tables 1. The rated current as listed is either 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 10% at the stated ambient temperatures (-40°C, 25°C, 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. In the series hookup mode, the resistance of the interconnection needs to be taken into account when calculating temperature rise. 4. In high volt*time applications additional heating in the component can occur due to core 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) (°C) K0 Coreloss = K1 * (Fsw(kHz))1.6688 * (K2 * dI)2.17 (mW) DCRloss = Irms2 * DCR(mΩ) (mW) Irms = IDC2 + dI 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. Inductance vs Current Characteristics Percentage of Initial Inductance P2 P1 120 P3 100 80 60 40 20 0 0 0.2 0.4 0.6 0.8 1.0 Normalized IDC 1.2 1.4 1.6 1.8 P1 - Initial Inductance, Lo (.1Vrms, 300 kHz, 0ADC, 25C) P2 - Inductance (typically 95% Lo) at Rated IDC. P3 - Inductance (typically 90% Lo) at Ipk. Normalized Inductance 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 31 PC500.B (5/02)