pc500.b (5/02) 28 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 for use with volterra's chipset mechanicals schematic p1681t p2004t & P2005T weight ................0.464 grams ................0.945 grams tape & reel .............1500/reel .....................1000/reel dimensions: inches mm unless otherwise specified, all tolerances are .010 0,25 two package sizes height: .125" and .177" max footprint: .276" x .250" and .340" x .250" max current range: up to 15 arms typical energy storage density: 1450 j/in 3 frequency range: 300 khz to 2 mhz inductance dcr inductance saturation current 2 heating trise core loss 4 part @irated irated 1 (m ? ? ) @0a dc (a) current 3 factor k0 4 number (nh 20%) (a dc ) typical max (nh 20%) -40c 25c 125c (a) (cm 2 ) factor k1 factor k2 p1681t 95 15 .31 .39 100 18.2 18 16.2 15 1.0032 .00319 .07381 P2005T 142.5 15 .45 .56 150 18.2 18 16.2 15 2.2458 .00638 .05961 p2004t 190 15 .45 .56 200 17 16.8 15.12 15 2.2458 .00638 .07949 electrical specifications @ 25c ? operating temperature - 40c to 125c p1681t p2004t/P2005T (volta 1) (volta 2)
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29 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 for use with volterra's chipset 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 (-40c, 25c, 125c). 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 tempera- ture of the part to increase by approximately 30c. this current is determined by mounting the component on a pcb with .25" wide, 3 oz. equivalent copper traces, and applying the current to the device for 30 minutes. 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: trise = coreloss (mw) + dcrloss (mw) .833 (c) k0 coreloss = k1 * ( fsw(khz) ) 1.6688 * (k2 * di) 2.17 (mw) dcrloss = irms 2 * dcr(m ? ) (mw) irms = idc 2 + di 2 ? (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
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