15 pc500.b (5/02) 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 smt power inductors shielded drum core - p1172 series low profile and suitable for compact surface area mounting large permissible dc current low dc resistance
mechanical schematic weight . . . . . . . . 4.5 grams tape & reel . . . . . . 450/reel unless otherwise specified, all tolerances are .010 0,25 dimensions: inches mm part inductance irated 1 dcr (m ? ? ) inductance saturation 2 heating 3 core loss 4 number @irated (a dc ) @0a dc current current factor k ( h) min typ max ( h) @25c (a) (a) p1172.132t 0.8 14 2.3 3.0 1.330% 15 14 89.8 p1172.202t 1.3 10 4.5 6.0 2.030% 13 10 113.0 p1172.272t 1.8 9.0 5.8 7.3 2.730% 11 9.0 129.1 p1172.372t 2.4 8.3 6.8 8.5 3.730% 9.2 8.3 153.4 p1172.472t 3.1 7.9 7.6 9.5 4.730% 8.2 7.9 171.9 p1172.602t 3.9 6.0 13.0 16.5 6.030% 6.9 6.0 196.3 p1172.762t 4.9 5.7 14.3 18.5 7.630% 6.2 5.7 225.0 p1172.103t 7.5 5.2 17.3 21.8 1020% 5.5 5.2 248.7 p1172.123t 9.0 4.5 23.3 29.0 1220% 5.1 4.5 276.3 p1172.153t 11.3 4.1 28.3 35.4 1520% 4.4 4.1 300.8 p1172.183t 13.5 4.0 29.4 37.0 1820% 4.3 4.0 339.1 p1172.223t 16.5 3.8 33.2 42.0 2220% 3.8 3.8 369.7 p1172.273t 20.3 3.4 36.2 45.9 2720% 3.4 3.6 409.4 p1172.333t 24.8 3.0 49.3 64.8 3320% 3.0 3.1 455.9 p1172.393t 29.3 2.7 65.2 81.5 3920% 2.8 2.7 494.8 p1172.473t 35.3 2.6 71.4 89.0 4720% 2.6 2.6 551.3 p1172.683t 51.0 2.1 108.0 135.0 6820% 2.1 2.1 671.0 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 induc- tance at zero bias. this current is determined by placing the component at room ambient (25c), 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 40c. this current is determined by extending the terminals of the component with 30mm length 28 gauge buss wires and applying the current to the device for 30 minutes. the tem- perature is measured by placing the thermocouple between the winding and the shield. 4. in high volt*time applications, additional heating in the component can occur due to core losses in the inductor which may necessitate derating the current in order to limit the temperature rise of the component. in order to deter- mine the approximate total loss (or temperature rise) for a given application, both copper losses and core losses should be taken into account. estimated temperature rise: trise = [total loss (mw) / 6.288] .833 ( o c ) total loss = copper loss + core loss (mw) copper loss = irms 2 x dcr (typical) (mw) irms = [i dc 2 + ? i 2 /12] 1/2 (a) core loss = 6.81 x 10 -7 x f (khz) 1.1 x (k x ? i) 2.15 (mw), where f varies between 25 khz and 300 khz, and b less than 2000 gauss. electrical specifications @ 25c ? operating temperature - 40c to +85c
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