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FP80 데이터시트(PDF) 1 Page - Power-One |
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FP80 데이터시트(HTML) 1 Page - Power-One |
1 / 5 page Accessories Filter & Ring Core Chokes FP, L and LP Series REV. SEP 29, 2003 Page 1 of 5 Description These Filters and chokes are designed to reduce input in- terference and/or output ripple voltages occurring in appli- cations with switched mode power supplies. Since all our filters contain a Moly Permalloy Powder (MPP) ring core they feature very low DC losses as well as high DC mag- netisation and operate perfectly at the input and/or output of switching regulators ensuring effective filtering even at elevated DC current levels. These special characteristics allow the chokes to be operated at DC currents which con- siderably exceed the rated current, by accepting a corre- sponding gradual loss of inductance (unlike ferrite core chokes where inductance rapidly decreases above a cer- tain DC magnetising level). In applications where switching regulators have long supply lines, filters and chokes are used in order to prevent oscilla- tions caused by their negative input impedance. For further information refer also to switching regulator data for "Option L", and to section: Technical Information: Installation & Ap- plication. Table 1a: Type survey of FP filter blocks Filter type Matching switching Part No. regulator type FP38 PSR 54 PSA 55 PSA 5A2 PSA 5A5 PSA 123 PSA 153 FP80 PSR 53 PSR 122.5 PSR 152.5 PSR 242 PSR 362 PSA 242.5 FP144 PSA 121.5 PSA 151.5 PSA 241.5 PSA 361 PSA 481 Table 1b: Type survey ring core chokes Type Inductivity ILn Single Symm. Part No. coil coil LP34-3 34 µH3 A • L20-7 20 µH7 A • LP20-7 20 µH7 A • LP183 2 ∞ 183 µH8 A • Filter Blocks FP Types The filter blocks contain, in addition to a MPP ring core, a capacitor and an attenuation resistor, capable of handling the high ripple currents seen at the input of switching regu- lators. This forms a complete external filter system opti- mised to prevent oscillations and to reduce superimposed interference voltages and currents, specially designed for use in PCB applications together with switching regulators in an A01 case size. For selection of filters refer to the type survey. Table of Contents Page Description ....................................................................... 1 Filter Blocks FP Types ..................................................... 1 Page Low-Loss Ring Core Chokes L/LP-Series ....................... 3 Mechanical Dimensions ................................................... 5 |
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