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ART2815TCKC Datasheet(PDF) 9 Page - International Rectifier |
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ART2815TCKC Datasheet(HTML) 9 Page - International Rectifier |
9 / 12 page www.irf.com 9 ART28XXT SERIES Additional Filtering Figure VI. External Input EMI Filter While the internal input filter of Figure V keeps input ripple current below 100 mA p-p, an external filter may be applied to further attenuate this ripple to a level below the CE03 limits imposed by MIL-STD-461B. Figure VI is a general diagram of the International Rectifier filter module designed to operate in conjunction with the ART28XX series converters to provide that attenuation. This circuit as shown in Figure VI is constructed using the same quality materials and processes as those employed in the ART28XX series converters and is intended for use in the same environments. This filter is fabricated in a complementary package style whose output pin configuration allows pin to pin connection between the filter and the converter. More complete information on this filter can be obtained from the ARF461 data sheet. An external filter may also be added to the output where circuit requirements dictate extremely low output ripple noise. The output filter described by Figure VII has been characterized with the ART2815T using the values shown in the associated material list. It is important to be aware that when filtering high frequency noise, parasitic circuit elements can easily dominate filter performance. Therefore, it is incumbent on the designer to exercise care when preparing a circuit layout for such devices. Wire runs and lengths should be minimized, high frequency loops should be avoided and careful attention paid to the construction details of magnetic circuit elements. Tight magnetic coupling will improve overall magnetic performance and reduce stray magnetic fields. +5 V 5V Return +15V 15V Return -15V +5V Out +5V Return +15V Out 15V Return -15V Out C1 C2 C3 C4 C5 C6 C7 C8 L1 L2 L4 L3 G &Ã
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8% &AÃ $WÃH"(%!!$ #ÃUhhy 8&Ã8' !$AÃ$WÃH"(%!!$%'ÃUhhy Figure VII. External Output Filter Measurement techniques can impose a significant influ- ence on results. All noise measurements should be mea- sured with test leads as close to the device output pins as physically possible. Probe ground leads should be kept to a minimum length. Although internal filtering is provided at both the input and output terminals of the ART28XX series, additional filtering may be desirable in some applications to accommodate more stringent system requirements. |
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