SMT POWER INDUCTORS Shielded Drum Core - P1172 Series Low profile and suitable for compact surface area mounting Large permissible DC current Low DC resistance Electrical Specifications @ 25°C — Operating Temperature -40°C to +85°C Part Number P1172.132T P1172.202T P1172.272T P1172.372T P1172.472T P1172.602T P1172.762T P1172.103T P1172.123T P1172.153T P1172.183T P1172.223T P1172.273T P1172.333T P1172.393T P1172.473T P1172.683T Inductance @Irated ( µ H) MIN 0.8 1.3 1.8 2.4 3.1 3.9 4.9 7.5 9.0 11.3 13.5 16.5 20.3 24.8 29.3 35.3 51.0 Inductance @0A DC ( µ H) 1.3±30% 2.0±30% 2.7±30% 3.7±30% 4.7±30% 6.0±30% 7.6±30% 10±20% 12±20% 15±20% 18±20% 22±20% 27±20% 33±20% 39±20% 47±20% 68±20% DCR (m Ω ) Irated 1 (A DC ) TYP 2.3 4.5 5.8 6.8 7.6 13.0 14.3 17.3 23.3 28.3 29.4 33.2 36.2 49.3 65.2 71.4 108.0 14 10 9.0 8.3 7.9 6.0 5.7 5.2 4.5 4.1 4.0 3.8 3.4 3.0 2.7 2.6 2.1 MAX 3.0 6.0 7.3 8.5 9.5 16.5 18.5 21.8 29.0 35.4 37.0 42.0 45.9 64.8 81.5 89.0 135.0 Saturation 2 Current @25°C (A) 15 13 11 9.2 8.2 6.9 6.2 5.5 5.1 4.4 4.3 3.8 3.4 3.0 2.8 2.6 2.1 Heating 3 Current (A) 14 10 9.0 8.3 7.9 6.0 5.7 5.2 4.5 4.1 4.0 3.8 3.6 3.1 2.7 2.6 2.1 Core Loss Factor K 4 89.8 113.0 129.1 153.4 171.9 196.3 225.0 248.7 276.3 300.8 339.1 369.7 409.4 455.9 494.8 551.3 671.0 Notes from Table 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 to 65% (or 75%) of its nominal inductance at zero bias. This current is determined by placing the component at room ambient (25°C), 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 not more than 40°C. This current is determined by extending the terminals of the Estimated Temperature Rise: component with 30mm length 28 gauge buss wires and applying the current to the device for 30 minutes. The tem.833 o (C) perature is measured by placing the thermocouple between Trise = [Total loss (mW) / 6.288] the winding and the shield. Total loss = Copper loss + Core loss (mW) 4. In high volt*time applications, additional heating in the Copper loss = Irms2 x DCR (Typical) (mW) component can occur due to core losses in the inductor which may necessitate derating the current in order to limit Irms = [IDC2 + ∆I2/12]1/2 (A) the temperature rise of the component. In order to deterCore loss = 6.81 x 10-7 x f (kHz)1.1 x (K x ∆I)2.15 (mW), mine the approximate total loss (or temperature rise) for a given application, both copper losses and core losses where f varies between 25 kHz and 300 kHZ, and B less should be taken into account. than 2000 Gauss. Schematic Mechanical .315 8,00 .315 8,00 .039 1,00 2 XXX .472 12,00 Dimensions: Inches mm 1 1 .315 8,00 .075 1,91 2 1 .039 1,00 .197 5,00 2 .472 12,00 .366 9,30 SUGGESTED PAD LAYOUT Unless otherwise specified, all tolerances are ± .010 0,25 Weight . . . . . . . . 4.5 grams Tape & Reel . . . . . . 450/reel .320 8,13 .630 16,00 .945 24,00 TAPE & REEL 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 15 PC500.B (5/02)