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  hi?rel design ? welded hermetic package ? all ceramic capacitors ? surface mount magnetics features ? replaces apex fdhc461 ? ?55o to +125oc operation ? 40db minimum differential mode rejection at 200 khz ? 60db minimum differential mode rejection from 500 khzto 50 mhz ? meets mil?std?461c ceo3 standards for msk dhc2800 series dc?dc converters ? mil?std?704a through e power bus compatability description the EFJ2803 is a high reliability emi filter for use with the dac2800/dhc2800 series of dc-dc converters. this filter has been designed to reduce the input line reflected ripple current to within the limit of mil-std-461c, ce03. EFJ2803 hybird emi filters utilize all ceramic capacitors, surface mount magnetics and ultrasonically bonded alumi- num wires to provide reliable operation at all operating tem- peratures while surviving very high g forces. the 8-pin package is hermetically sealed and isolated from the internal circuits. heat sinking is recommended for full power operation at elevated ambient temperatures. multiple dc-dc converters may use the same filter, up to the rated throughput current of the filter. typical application equivalent schematic external connections v in +v out case gnd output common input common 4707 dey road liverpool, n.y. 13088 m.s.kennedy corp. (315) 701-6751 EFJ2803 iso-9001 certified by dscc 3a emi filter rev. - 2/01 1 1 2 3 4 5 6 7 8 +vin +vout +vout case ground output common output common input common case ground
parameter test conditions min typ max units input voltage steady state 0 28 40 v input current dc 3a output voltage steady state v out = v in -iin(rdc) vdc output current steady state 3 a dc resistance (rdc) t = 125c 0.5 @ 25c 0.85 ohms differential mode rejection 200 khz 40 db differential mode rejection 500khzC50mhz 60 db common mode rejection 2mhzC50mhz 40 db capacitance any pin to case 4 nf isolation any pin to case, 500vdc 100 mohm operating temperature range case baseplate C55 +125 oc storage temperature range case baseplate C65 +150 oc power dissipation 1adc, t=125c 0.65 0.85 w case temperature rise case to air 38 c/w absolute maximum ratings specifications EFJ2803 absolute maximum ratings input voltage range 0-50vdc input voltage transient 80v @ 50ms output current 2 3adc temperature range, storage C65 to 150c. operating temperature, case C55 to 125c. notes: 1. tcase= -55c to 125c unless otherwise specified. 2. typical dissipation at 3 amps is 6 watts. specifications rev. - 2/01 2
typical performance graphs EFJ2803 rev. - 2/01 3 dhc2805s converter with EFJ2803 filter dac2812s converter with EFJ2803 filter dac2815ss converter with EFJ2803 filter dac2812d converter with EFJ2803 filter dhc2803s converter with EFJ2803 filter dac2815d converter with EFJ2803 filter
the information contained herein is believed to be accurate at the time of printing. msk reserves the right to make changes to its products or specifications without notice, however, and assumes no liability for the use of its products. please visit our website for the most recent revision of this datasheet. m.s. kennedy corp. 4707 dey road, liverpool, new york 13088 phone (315) 701-6751 fax (315) 701-6752 www.mskennedy.com note: all dimensions are 0.010 inches unless otherwise labeled. EFJ2803 the above example is an industrial grade 3 amp emi filter ordering information screening blank= industrial; e= extended reliability; h= class h; k= class k output current 03=3a nominal input voltage general part number rev. - 2/01 4 mechanical specifications


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