preliminary p558.p (9/02) height: .130"/.177? max (PA0274/pa0277) footprint: .28" x .26" (PA0274), .34" x .25" (pa0277) current range: up to 12 a inductance values: 475 nh and 600 nh maximum energy storage density: 2280 j/in 3 frequency range: up to 2 m hz 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 new! inductance dcr (#1-3) inductance saturation heating trise core loss 4 part number @ irated irated 1 (m ? ) @ 0 adc current 2 current 3 factor 4 factor factor (nh 20%) (adc) typ max (nh 20%) 25c 125c (a) k0 k1 k2 PA0274 475 6.0 1.6 1.76 700 7 4.8 12 1.40 .00638 .24632 pa0277 600 10.7 2.3 2.53 700 12.6 8 12 2.04 .01276 .13196 electrical specifications @ 25c ? operating temperature -40c to +100c smt power inductors for texas instrument swift series of dc/dc converters tps54672, tps54610, tps54810 and tps54910 mechanicals PA0274 pa0277
preliminary p558.p (9/02) for more information : performance warranty of products offered on this data sheet is limited to the parameters specified. data is subject to change w ithout notice. other brand and product names mentioned herein may be trademarks or registered trademarks of their respective owners. printed on recycled paper. ?2002, pulse engineering, inc. united states (worldwide) 12220 world trade drive san diego, ca 92128 u.s.a. http://www.pulseeng.com tel: 858 674 8100 fax: 858 674 8262 united kingdom (northern europe) 1 & 2 huxley road the surrey research park guildford, surrey gu2 5re united kingdom tel: 44 1483 401700 fax: 44 1483 401701 france (southern europe) zone industrielle f-39270 orgelet france tel: 33 3 84 35 04 04 fax: 33 3 84 25 46 41 taiwan, r.o.c. (northern asia) 3f-4, no. 81, sec. 1 hsintai wu road hsi-chih, taipei hsien taiwan, r.o.c. tel: 886 2 2698 0228 fax: 886 2 2698 0948 singapore (southern asia) 150 kampong ampat #07-01/02 ka centre singapore 368324 tel: 65 287 8998 fax: 65 280 0080 hong kong (china/hong kong) 19/f, china united plaza 1008 tai nan west street cheung sha wan, kowloon hong kong, china tel: 852 2788 6588 fax: 852 2776 1055 distributor notes from tables 1. the rated current as listed is either 85% of the saturation cur- rent or the heating current depending on which value is lower. 2. the saturation current is the current which causes the inductance to drop by 30% at the stated ambient temperatures (25c and 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 40c. 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 with no forced air cooling. 4. in high volt*time applications additional heating in the component can occur due to 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 appli- cation 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. smt power inductors for texas instrument swift series of dc/dc converters tps54672, tps54610, tps54810 and tps54910
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