4R7 (1/2) Conformity to RoHS Directive SMD Inductors(Coils) For Power Line(Wound, Magnetic Shielded) VLF Series VLF4012A-2 FEATURES SHAPES AND DIMENSIONS Miniature size Mount area: 3.5 3.7mm Low profile: 1.2mm max. height Generic use for portable DC to DC converter line 3.70.3 1.2max. ( ) High magnetic shield construction should actualize high resolu- Include terminal area Dimensions in mm tion for EMC protection. Available for automatic mounting in tape and real package. The products do not contain lead and support lead-free solder- RECOMMENDED PC BOARD PATTERN ing. 2.9 APPLICATIONS 4.7 Dimensions in mm DVCs, DSCs, PDAs, LCD displays, Cellular phones, HDDs, etc. ELECTRICAL CHARACTERISTICS DC resistance( ) Rated current(A) Inductance Inductance Test frequency Part No. Based on inductance Based on temperature (H) tolerance(%) (kHz) max. typ. change max. rise typ. VLF4012AT-3R3M1R0-2 3.3 20 100 0.11 0.095 1.0 1.4 VLF4012AT-4R7MR82-2 4.7 20 100 0.15 0.12 0.82 1.2 VLF4012AT-6R8MR74-2 6.8 20 100 0.20 0.17 0.74 1.0 VLF4012AT-100MR50-2 10 20 100 0.23 0.20 0.5 0.97 Rated current: Value obtained when current flows and the temperature has risen to 40C or when DC current flows and the nominal value of inductance has fallen by 30%, whichever is smaller. Operating temperature range: 40 to +105C (Including self-temperature rise) Conformity to RoHS Directive: This means that, in conformity with EU Directive 2002/95/EC, lead, cadmium, mercury, hexavalent chromium, and specific bromine-based flame retardants, PBB and PBDE, have not been used, except for exempted applications. All specifications are subject to change without notice. 001-04 / 20060927 / e531 vlf4012a 2.fm 3.50.3 1.3(2/2) TYPICAL ELECTRICAL CHARACTERISTICS INDUCTANCE vs. DC SUPERPOSITION CHARACTERISTICS VLF4012AT-3R3M1R0-2 VLF4012AT-4R7MR82-2 4.0 6.0 3.5 5.0 3.0 4.0 2.5 2.0 3.0 1.5 2.0 1.0 1.0 0.5 0.0 0.0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 ( ) DC current A ( ) DC current A VLF4012AT-6R8MR74-2 VLF4012AT-100MR50-2 14 8.0 12 10 6.0 8 4.0 6 4 2.0 2 0 0.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.0 0.2 0.4 0.6 0.8 1.0 ( ) ( ) DC current A DC current A TEST CIRCUIT C=20,000F A L=0.1H 2 1 Sample 1: LCR meter 4285A=100kHz 2: DC constant current All specifications are subject to change without notice. 001-04 / 20060927 / e531 vlf4012a 2.fm ( ) Inductance(H) Inductance H ( ) ( ) Inductance H Inductance H