fdu1250 series iron powder surface mount fixed inductor march 2006 1 ? 2006 toko america, inc. all rights reserved printed in usa cf-290-fdu1250 r-log0306a features ? compact size: 13.6mm x 12.4mm ? low profle: 5.0mm maximum ? high dc current: 27.2a at 0.50 h ? magnetically shielded ? low dc resistance ? low audible noise ? refow solderable ? packaged on 500 piece reels ? lead-free terminations dimensions and recommended footprint description the toko fdu1250 series is a compact, high-current surface mount fxed inductor with a maximum dc current rating of 27.2 amps at 0.50 h. manufactured with a proprietary iron powder composition and process, the product is specifcally designed for high current, space constrained dc-dc converter applications in portable computing, point-of-load modules, and computer peripherals. type fdu1250 toko part number fdu1250-r50m=p3 fdu1250-r56m=p3 fdu1250-r75m=p3 fdu1250-1r0m=p3 fdu1250-1r5m=p3 inductance (h) (1) 0.50 0.56 0.75 1.00 1.50 dc resistance ( m ) max. (2) 1.3 1.6 1.7 2.2 3.6 standard parts selection guide (1) inductance is measured by lcr-meter 4284a (agilent) or equivalent. (2) dc resistance is measured by digital multimeter 34420a (agilent) or equivalent. note: =p3 is added to each part number to indicate tape and reel packaging. tolerance (%) 20 20 20 20 20 temperature rise current [+40c] (a) max. (3) 27.2 25.7 25.2 21.2 18.2 (3) maximum allowable dc current is that which causes a 20% inductance reduction from the initial value, or coil temperature to rise by 40c, whichever is smaller. (reference ambient temperature 20c). test freq. (khz) 100 100 100 100 100 inductance decrease current [-20%] (a) max. (3) 34.0 32.0 24.5 23.5 17.9 ?????????? ? ??? ? ? toko part no. a b c d fdu1250-r50m=p3 13.3 8.3 3 7.9 fdu1250-r56m=p3 13.3 8.3 3 7.9 fdu1250-r75m=p3 13.3 8.3 3 7.9 fdu1250-1r0m=p3 13.3 8.3 3 7.9 fdu1250-1r5m=p3 13.20.4 8.2 3.1 7.7 type fdu1250 inductance range: 0.50 - 1.50 h frequency range: 0.1 - 5mhz unit: mm tolerance: 0.3mm absolute max. voltage (v) 30 30 30 30 30 ? ???? ? ? ??? ???????? ??? ? ???
fdu1250 series iron powder surface mount fixed inductor march 2006 2 ? 2006 toko america, inc. all rights reserved printed in usa cf-290-fdu1250 r-log0306a toko america, inc. 1250 feehanville drive, mount prospect, illinois 60056 tel: (847) 297-0070 fax: (847) 699-7864 web: http:// www.tokoam.com the information furnished by toko, inc. is believed to be accurate and reliable. however, toko reserves the right to make changes or improvements in the design, specifcation or manufacture of its products without further notice. toko does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of third parties which may result from the use of its products. no license is granted by implication or otherwise under any patent or patent rights of toko, inc. typical characteristics ????? ?????? ?????? ????? ???????????? ? ?? ?? ?? ?? ??????????????? ? ??? ?? ?? ? ? ? ??? ? ??? ????? temperature rise ( c) 40 30 10 dc current (a) 0 10 50 60 0 20 30 50 40 ????? ?????? ?????? ????? ????? 20
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