fdh1040 / fdh1040b series iron powder surface mount fixed inductor march 2006 1 ? 2006 toko america, inc. all rights reserved printed in usa cf-277-fdh1040 r-log0306a type fdh1040 / fdh1040b type fdh1040 / fdh1040b inductance range: 0.36 - 0.56 h frequency range: 0.1 - 5mhz features ? compact size: 11.5mm x 10.5mm ? low profle: 4.0mm maximum ? high dc current: 24.0a at 0.36 h ? magnetically shielded ? low dc resistance ? low audible noise ? refow solderable ? packaged on 500 piece reels ? lead-free terminations toko part number inductance (1) ( h) 100 100 100 100 20 20 20 20 tolerance ( % ) test freq. (khz) temperature (3) rise current [+40c] (a) max. dimensions note: =p3 is added to each part number to indicate tape and reel packaging. description the toko fdh1040 / fdh1040b series is a compact, high-cur - rent surface mount fxed inductor with a maximum dc current rating of 24 amps. 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. 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. (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). unit: mm 1.4 1.4 1.9 1.9 dc (2) resistance (m ) max. 28.0 28.0 22.0 22.0 inductance (3) decrease current [-20%] (a) max. 24.0 24.0 20.0 20.0 ? ??? ????????? ????? ????????? ?? ? ? ????????? ????? ????????? fdh1040 fdh1040b recommended patterns: fdh1040 fdh1040b ??? ??? ??? ??? ??? ??? ??? ? unit: mm fdh1040-r36m=p3 fdh1040b-r36m=p3 fdh1040-r56m=p3 fdh1040b-r56m=p3 0.36 0.36 0.56 0.56 30 30 30 30 absolute max. voltage (v)
fdh1040 / fdh1040b series iron powder surface mount fixed inductor march 2006 2 ? 2006 toko america, inc. all rights reserved printed in usa cf-277-fdh1040 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 manu - facture 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 ??? ??? ??? ??? ??? ??? ??? ??? ??? ???????? ??? ??????????? ? ?? ???? ? ???? ? ? ?? ?? ?? ?? ?? ? ? ?? ?? ?? ?? ?? ? ???????????????????? ???? ? ???? ? ? ? ? ? ? ? ? ? ? ? ? ??? ???????? ???
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