SD8328 Series Low Profile Power Inductors Description RoHS 2002/95/EC • 125°C 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 2.7µH to 100µH • 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: -40°C to +125°C • Operating temperature range: -40°C to +125°C (range is application specific) • Solder reflow temperature: +260°C 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 (µH) 2.5 3.3 4.7 7.3 10 15 22 33 47 68 100 Packaging • Supplied in tape and reel packaging, 1280 per reel OCL (1) µH±30% 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 40°C 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 125°C under worst case operating conditions verified in the end application. (3) Isat Amperes peak for approximately 35% rolloff (@25°C) DCR (Ω) mΩ @20°C (Typical) 12 14 19 30 36 53 76 120 150 220 330 DCR (Ω) mΩ @20°C (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 µH), ∆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. 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 Bp-p (mT) 1000 SD8328 Series Low Profile Power Inductors Temperature Rise vs. Loss 160 Temperature Rise (ºC) 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% 80.0% 100.0% 120.0% % Isat PM-4140 3/07 © Cooper Electronic Technologies 2007 Visit us on the Web at www.cooperbussmann.com 1225 Broken Sound Pkwy. Suite F Boca Raton, FL 33487 Tel: +1-561-998-4100 Toll Free: +1-888-414-2645 Fax: +1-561-241-6640 This bulletin is intended to present product design solutions and technical information that will help the end user with design applications. Cooper Electronic Technologies reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Cooper Electronic Technologies also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications. Life Support Policy: Cooper Electronic Technologies does not authorize the use of any of its products for use in life support devices or systems without the express written approval of an officer of the Company. Life support systems are devices which support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user.