SD8328 Series Low Profile Power Inductors Description RoHS 2002/95/EC * 125C maximum temperature operation * Low profile surface mount inductor * 8.3mm x 9.5mm x 3.0mm shielded drum core * Ferrite core material * Inductance range from 2.7H to 100H * Current range from 6.6 Amps to 0.8 Amps * Frequency range up to 1MHz Applications * Buck or Boost inductor * Noise filtering output filter chokes * Notebook power/display * LCD Monitors/Displays/Televisions * Battery chargers, LCD bias supplies * Battery and Industrial power systems * Computer, DVD players * Portable power devices, DC-DC converters Environmental Data * Storage temperature range: -40C to +125C * Operating temperature range: -40C to +125C (range is application specific) * Solder reflow temperature: +260C max. for 10 seconds maximum Part Number SD8328-2R5-R SD8328-3R3-R SD8328-4R7-R SD8328-7R3-R SD8328-100-R SD8328-150-R SD8328-220-R SD8328-330-R SD8328-470-R SD8328-680-R SD8328-101-R Rated Inductance (H) 2.5 3.3 4.7 7.3 10 15 22 33 47 68 100 OCL (1) H30% Irms(2) Amperes Isat (3) Amperes 2.7 3.4 5.0 7.6 9.1 14.5 21.1 31.9 44.9 64.2 97.0 6.6 6.1 4.5 3.4 3.3 2.35 1.85 1.45 1.30 0.98 0.80 4.5 4.0 3.6 2.9 2.6 2.0 1.7 1.4 1.2 1.0 0.8 (1) Open Circuit Inductance Test Parameters: 100kHz, 0.1V, 0.0Adc. (2) Irms: DC current for an approximate T of 40C without core loss. Derating is necessary for AC currents. PCB layout, trace thickness and width, air-flow, and proximity of other heat generating components will affect the temperature rise. It is recommended that the temperature of the part not exceed 125C under worst case operating conditions verified in the end application. (3) Isat Amperes peak for approximately 35% rolloff (@25C) LOW PROFILE SHIELDED DRUM (SD8328) Packaging * Supplied in tape and reel packaging, 1280 per reel DCR () m @20C (Typical) 12 14 19 30 36 53 76 120 150 220 330 DCR () m @20C (Maximum) 15.6 18.0 24.7 39 45 69 99 156 194 286 430 K-factor (4) 43 33 23 15 11 7.2 4.9 3.3 2.3 1.6 1.1 (4) K-factor: Used to determine B p-p for core loss (see graph). B p-p = K*L*I, B p-p(mT), K: (K factor from table), L: (Inductance in H), I (Peak to peak ripple current in Amps). (5) Part Number Definition: SD8328-xxx-R SD8328 = Product code and size; -xxx = Inductance value in uH; R = decimal point; If no R is present, third character = # of zeros. -R suffix = RoHS compliant Mechanical Diagrams BOTTOM VIEW TOP VIEW 1 2.5 typ 8.3 max FRONT VIEW RECOMMENDED PCB LAYOUT SCHEMATIC 2.9 1.2 typ 3.0 max 1 1.8 XXX wwlly R 9.5 max 6.3 typ LEFT VIEW 5.7 2 Dimensions are in millimeters. xxx = Inductance value in uH. R = decimal point. If no R is present third character = # of zeros. wwllyy = Date code, R = Revision level. PM-126 2 SD8328 Series Low Profile Power Inductors Packaging Information 4.0 1.5 dia +0.1/-0.0 1.5 dia min 2.0 A 1.75 7.5 Bo B1 16.0 XXX wwlly R A1 A 12.0 Ko Ao SECTION A-A User direction of feed Ao=9.5 mm Bo=10.0 mm A1=8.5 mm B1=9.7 mm Ko=3.2 mm Parts packaged on 13" Diameter reel, 1,280 parts per reel. Core Loss 10 500kHz 1MHz 300kHz 200kHz 1 Core Loss (W) 100kHz 0.1 0.01 0.001 0.0001 1 10 100 1000 Bp-p (mT) LOW PROFILE SHIELDED DRUM (SD8328) PM-127 SD8328 Series Low Profile Power Inductors Temperature Rise vs. Loss 160 Temperature Rise (C) 140 120 100 80 60 40 20 0 0.0 0.2 0.4 0.6 0.8 1.0 Total Power Loss (W) Inductance Characteristics OCL Vs. Isat 120.0% 100.0% % OCL 80.0% 60.0% +85 Deg.C 40.0% +25 Deg.C 20.0% -40 Deg.C 0.0% 0.0% 20.0% 40.0% 60.0% LOW PROFILE SHIELDED DRUM (SD8328) % Isat PM-128 80.0% 100.0% 120.0%