SMD Beads and Chokes 1.0 INTRODUCTION To support designers and manufacturers of electronic circuitry, FERROXCUBE manufactures a comprehensive line of ferrite EMI-suppression products for use on circuit boards, through-hole as well as surface-mountable. The demand for SMD-suppression components is still growing. Therefore FERROXCUBE has focused its effort and expertise to develop new types and sizes through a continuously optimized design process to complete our SMD selection: * Low profiled SMD-bead for flat designs * SMD-Current Compensated Chokes Introduction 2.0 EMI INTERFERENCE SUPPRESSION AND EMC ELECTROMAGNETIC COMPATIBILITY With the ever increasing intensive use of electronic equipment Electromagnetic Compatibility (EMC) has become an important issue. Since 1928 laws specify limits of the level of interference caused by equipment (EME; Electromagnetic Emission) and also the sensitivity of equipment to incoming interference (EMS; Electromagnetic Susceptibility). Limiting curves are defined by international organizations and national agencies such as CISPR, FCC in the USA, the VDE in Germany and VCCI in Japan. Since density of equipment increases, laws will become more stringent in the near future. EMC principles are explained in figure 1. During the design phase, problems with interference can be avoided to some extent. Often additional suppression components such as capacitors and inductors will be necessary to meet the required levels. Inductive components are very effective in blocking interfering signals, especially at high frequencies. Capacitors are used as shunt impedance (ZP) for the unwanted signal. Unfortunately for high frequencies, most capacitors do not have the low impedance one might except because of parasitic inductance or resistance (Fig. 2). Inductors (ZFXC) are used in series with the load impedance (ZL). Most inductive interference suppression components (choke, bead) are based upon a ferrite core. * SMD-Wide Band Chokes * Gapped SMD-bead for Power inductor Our recognized know-how and staff of application engineers are the basis of the technical support, which is entirely at your disposal for your comments and inquiries. Well controlled manufacturing processes, automated production lines and measuring equipment and a long experience in ferrites make FERROXCUBE a flexible, capable and reliable partner, able to advise and provide also customdesigned products, either completely new or similar to existing types. FERROXCUBE offers smart solutions to comply with the more and more severe EMC norms and requirements: our new SMD-components are suitable to prevent generated interference and to suppress incoming noise signals and parasitic oscillations. Figure 1. Principles of EMC 1 SMD Beads and Chokes Introduction Ferrite inductors provide low impedance for the wanted signal, but high impedance for the interfering, unwanted signal (noise). The effectiveness of noise suppression is found by comparing the situation without and with ferrite inductor (see figure 3. A measure for the suppressors effectiveness is the insertion loss (attenuation), which is defined as the ratio of noise voltages (Ula / Ulb) across the load impedance ZL without and with inductor Zfxc: Insertion loss is given by: Figure 2. Basic suppression circuits 20 x log (Ula / Ulb) = 20 x log (1 + (Zfxc / ((Zi + (ZL)) in [dB] The parameter to characterize the inductor performance, independent of a circuit, is its impedance as a function of frequency (Zfxc = f (Freq)). Figure 3. Interference basic circuit with inductance SMD Beads and Chokes Material Characteristics 3.0 MATERIAL CHARACTERISTICS * 3S1 and 4S2 Symbol Conditions Value / grade Unit 3S1 4S2 4000 20% 10 KHz 0.1 mT 25C 850 20% - B 10 KHz 250 A / m 25C ~ 350 ~ 270 mT 10 KHz 250 A / m 100C ~ 180 ~ 180 mT 1 MHz 25C 30 - 10 MHz 25C 60 - - 50 |Z| 30 MHz 300 MHz DC 25C - 90 ~1 ~ 105 m Tc 125 125 C DENSITY ~ 4900 ~ 5000 Kg/m3 Table 1. 3S1 and 4S2 characteristics * 3S4 and 4B1 Symbol B tan / i |Z| 10 KHz Value / grade Unit 3S4 4B1 1700 20% 250 20% - 25C ~ 320 ~ 310 mT 250 A / m 100C ~ 170 ~ 260 mT 0.1 mT 25C 10 KHz 250 A / m 10 KHz 1 MHz 0.1 mT 25C - 90 10 - 3 MHz 0.1 mT 25C - 300 106 - 6 3 MHz 25 - 30 MHz 60 - 100 MHz 80 - 300 MHz 90 - ~ 10^3 ~ 10 m Tc 110 250 C DENSITY ~ 4800 ~ 4600 Kg/m3 Table 2. 3S4 and 4B1 characteristics Conditions DC 25C 5 3 SMD Beads and Chokes Material Characteristics * 3C96 and 4S3 Symbol B tan / i |Z| Value / grade Unit 3C96 4S3 0.1 mT 25C 2000 20% 250 20% - 10 KHz 250 A / m 25C ~ 500 ~ 310 mT 10 KHz 250 A / m 100C ~ 440 ~ 260 mT 10 KHz 1 MHz 0.1 mT 25C - 90 10 - 3 MHz 0.1 mT 25C - 300 106 - 6 30 MHz - 10 50 MHz - 40 200 MHz - 200 500 MHz - 250 ~5 ~ 10 m Tc 240 250 C DENSITY ~ 4800 ~ 4600 Kg/m3 Table 3. 3C96 and 4S3 characteristics Conditions DC 25C 5 * 3S5 and 4S60 Symbol B Conditions 10 KHz 3S5 4S60 2000 20% - 25C ~ 545 ~ 260 mT 250 A / m 100C ~ 435 ~ 85 mT - 40 - 20 - 25C 10 KHz 250 A / m 10 KHz - 25C 1 MHz 40 10 MHz Table 4. 3S5 and 4S60 characteristics DC Unit 3800 20% 0.1 mT Q factor 0.1 MHz |Z| Value / grade 25C ~ 10 ~ 105 m Tc 255 100 C DENSITY ~ 4800 4700 - 5100 Kg/m3 SMD Beads 4.0 CHIP BEADS FOR INTERFERENCE SUPPRESSION Ferroxcube ferrite beads are well known to suppress unwanted interference.They are supplied as: * Suppression bead for shifting on a wire * Bead-on-wire for through-hole mounting on a PCB In response to market demands for smaller lighter and more integrated electronic devices FERROXCUBE added a series of SMD-type chip beads to the bead families. The ferrite chip bead EMI-suppressor provide a powerful means of EMI / RFI attenuation for electronic equipment. Four compact sizes are standardized and available in suppression material grades 3S1, 4S2, 4S3, 3S5 and 4S60 according to impedance/frequency requirements at each application. General, Product and Type Specification 4.2 PRODUCT SPECIFICATION APPLICABLE MATERIALS: 4.2.1 GENERAL SPECIFICATION * * * * * Chip beads are available in four standard sizes and five suppression material grades. A chip bead is made of a ferrite tube with a rectangular cross section and a fead through flat tinned copper wire, which is bending around the edges and forms the terminals of the component. This design offers many superior mechanical and electrical features. FEATURES: * Low magnetic leak inductance due to magnetic closed circuit * Resistant to mechanical shocks and pressure * Excellent solder ability (reflow soldering, flow soldering, iron soldering) * Terminals are highly resistant to pull forces * Low tolerances of mechanical dimensions enable automatic mounting 3S5 for frequencies up to 30 MHz 3S1 for frequencies up to 100 MHz 4S60 for frequencies up to 300 MHz 4S2 for frequencies up to 1000 MHz 4S3 for frequencies up to 1200 MHz TYPE DESCRIPTION: e.g. BDS3/1.8/5.3-3S1-Z (1)(2) (3) (4) (5) (6) (1) Product type (BDS = Bead for Surface mounting) (2) Width (in mm) (3) Height (in mm) (4) Length (in mm) (5) Material grade (e.g. 3S1) (6) -Z lead-free version* *Note: Not lead-free old version available depending on stock.All new codes are leadfree (not -Z included on type description) ORDERING CODE (12 NC): 4.1 PRODUCT APPLICATION APPLICATIONS: Chip beads have the sample application area as beads-on-wire, but in addition they offer the full advantages of SMD technology like economical mounting, high packing density of components, reliable soldering etc. Applications for these components can be found in e.g.: * EMI-suppression * Decoupling * Damping parasitic oscillations e.g. 433003036301 * Office automation equipment * Electronic data processing equipment * Telecommunication * Automotive * Consumer electronic products (audio / video) * Domestic appliances The first 11 digits of the 12NC are sufficient to order the desired chip bead.The type description is additional information. 4.2.2 SHAPE AND DIMENSIONS BDS3/1.8/5.3 BDS3/3/8.9 BDS3/3/4.6 BDS4.6/3/8.9 Figure 4. Chip bead dimensions (in millimeters) 5 SMD Beads General, Product and Type Specification 4.2.3 ELECTRICAL CHARACTERISTICS IMPEDANCE [] AT FREQUENCY [MHz] TYPE 1 3 10 25 30 100 300 Mass 700 (g) BDS3/1.8/5.3-3S1 - - 28 33 - 25 - - ~ 0.15 BDS3/1.8/5.3-4S2 - - - 25 - 38 45 - ~ 0.3 BDS3/3/4.6-3S1 - 25 45 35 - - - - ~ 0.15 BDS3/3/4.6-4S2 - - - 30 - 50 55 - ~ 0.3 BDS3/3/4.6-3S5 15 - 35 - 30 - - - ~ 0.15 BDS3/3/4.6-4S60 - - 25 - 35 38 - - ~ 0.3 BDS3/3/4.6-4S3 - - - - 47 66 70 ~ 0.3 BDS3/3/8.9-3S1 - 55 80 55 - - - - ~ 0.5 BDS3/3/8.9-4S2 - - - 65 - 100 110 - ~ 0.5 BDS4.6/3/8.9-4S2 - - - 65 - 100 110 - ~ 0.5 Table 5. Chip bead Z characteristics* *Note: Typical impedance values measured at 25C with Agilent-4191A impedance analyzer. |Z|min is -20% typical specified. Maximum Vdc DC resistance TYPE Volts ( m) Isat* Imax (A) mA 25 125 BDS3/1.8/5.3-3S1 60 < 0.6 ~ 300 10 8.5 BDS3/1.8/5.3-4S2 60 < 0.6 ~ 500 10 8.5 BDS3/3/4.6-3S1 60 < 0.6 ~ 300 10 8.5 BDS3/3/4.6-4S2 60 < 0.6 ~ 1000 10 8.5 BDS3/3/4.6-3S5 60 < 0.6 ~ 1500 10 8.5 BDS3/3/4.6-4S60 60 < 0.6 ~ 500 10 8.5 BDS3/3/4.6-4S3 60 < 0.6 ~ 500 10 8.5 BDS3/3/8.9-3S1 80 < 1.0 ~ 300 10 8.5 BDS3/3/8.9-4S2 80 < 1.0 ~ 1000 10 8.5 BDS4.6/3/8.9-4S2 80 < 1.0 ~ 1000 10 8.5 *Note: Isat is defined with DC bias value at which Z specification decreases around 50%. Table 6. Chip bead electrical characteristics* SMD Beads and Chokes General, Product and Type Specification 4.2.4 PACKAGING AND ORDERING CODES TYPE PACKING QUANTITY ORDERING CODE RoHS [PCS / REEL] [12 NC] complaint BDS3/1.8/5.3-3S1-Z 3000 43300305573_ yes BDS3/1.8/5.3-4S2-Z 3000 43300305566_ yes BDS3/3/4.6-3S5 3000 43300307237_ yes BDS3/3/4.6-4S60 3000 43300307238- yes BDS3/3/4.6-4S3 3000 43300307239_ yes BDS3/3/4.6-3S1-CZ 3000 43300305561_ yes BDS3/3/4.6-4S2-Z 3000 43300305550_ yes BDS3/3/8.9-3S1-CZ 2800 43300305564_ yes BDS3/3/8.9-4S2-Z 2800 43300305547_ yes BDS4.6/3/8.9-4S2-Z 2400 43300305551_ yes BDS3/1.8/5.3-3S1 3000 43300303685_ no* BDS3/1.8/5.3-4S2 3000 43300303682_ no* BDS3/3/4.6-4S2 3000 43300303629_ no* BDS3/3/8.9-4S2 2800 43300303630_ no* BDS4.6/3/8.9-4S2 2400 43300303652_ no* The chip beads are delivered taped and reeled, ready for use in automatic mounting machines. The packaging is according to IEC 286-A and EIA 481-A Table 7. Chip bead packaging quantities and ordering code * Check disponibility. Upon request 7 SMD Beads and Chokes General, Product and Type Specification 4.2.5 BLISTER TAPE AND REEL DIMENSIONS Figure 5. Blister tape SIZE Table 8. Physical dimensions of blister tape (in millimeters) DIMENSIONS (mm) BDS3/1.8/5.3 BDS3/3/4.6 BDS3/3/8.9 BDS4.6/3/8.9 A0 3.25 0.1 3.45 0.1 3.45 0.1 3.25 0.1 B0 5.85 0.1 5.1 0.1 9.4 0.1 9.4 0.1 K0 2.0 0.1 3.1 0.1 3.1 0.1 3.1 0.1 T 0.3 0.05 0.25 0.05 0.35 0.1 0.3 0.05 W 12.0 0.3 12.0 0.3 16.0 0.3 16.0 0.3 E 1.75 0.1 1.75 0.1 1.75 0.3 1.75 0.1 F 5.5 0.05 5.5 0.05 7.5 0.1 7.5 0.05 D0 1.5 + 0.1 1.5 + 0.1 1.5 0.1 1.5 + 0.1 D1 > 1.5 > 1.5 1.5 + 0.1 > 1.5 P0 4.0 0.1 4.0 0.1 4.0 0.1 4.0 0.1 P1 8.0 0.1 8.0 0.1 8.0 0.1 8.0 0.1 P2 2.0 0.1 2.0 0.05 2.0 0.1 2.0 0.1 Figure 6.Tape leader and trailer* Note*: trailer contains 75 empty compartments minimum (secured with tape) Leader: length of leader is 500 mm minimum and covered with covertape SMD Beads and Chokes General, Product and Type Specification Figure 7. Reel dimensions (in millimeters) SIZE Table 9. Physical dimensions of reel (in millimeters) DIMENSIONS (mm) A N W1 W2 12 330 100 0.5 12.4 16.4 16 330 100 0.5 16.4 20.4 4.2.6 RECOMMENDED SOLDER LANDS Figure 8a. Solder lands reflow soldering Figure 8b. Solder lands wave soldering SHAPE Table 10. Dimensions of solder lands (in millimeters) For recommended temperature/time profiles see 8.0 soldering curves Reflow soldering Wave soldering A B C D A B C D E BDS3/3/8.9 7.0 10.8 1.9 3.3 6.0 12.2 3.1 3.0 2.5 BDS3/3/4.6 2.8 6.4 1.8 3.3 2.0 6.4 2.2 3.0 0.8 BD4.6/3/8.9 7.0 10.8 1.9 3.3 6.0 12.2 3.1 3.0 2.5 BDS3/1.8/5.3 2.8 7.2 2.2 3.3 2.0 7.2 2.6 3.0 0.8 9 SMD Beads and Chokes Impedance Curves Z (ohms) 4.2.7 TYPICAL IMPEDANCE CURVES BDS3/1.8/5.3 Z (ohms) Figure 9. Z graph BDS3/1.8/5.3-3S1 and BDS3/1.8/5.3-4S2 Z (ohms) Figure 10. Z graph BDS3/3/4.6 in 3S1, 4S2, 3S5, 4S60 and 4S3 materials Figure 11. Z graph BDS3/3/8.9-3S1 and BDS3/3/8.9-4S2 SMD Beads and Chokes Impedance Curves .0 .0 .0 Z (ohms) .0 Figure 12. Impedance vs. frequency for BDS3/1.8/5.3-3S1 under DC-premagnetization .0 .0 .0 Z (ohms) .0 Figure 13. Impedance vs. frequency for BDS3/1.8/5.3-4S2 under DC-premagnetization .0 .0 .0 Z (ohms) .0 Figure 14. Impedance vs. frequency for BDS3/3/4.6-3S1 under DC-premagnetization 11 SMD Beads Impedance Curves Z (ohms) .0 .0 .0 .0 BDS3/3/4.6-4S60 Z (ohms) Figure 15. Impedance vs. frequency for BDS3/3/4.6-4S2 under DC-premagnetization BDS3/3/4.6-3S5 Figure 17. Impedance vs. frequency for BDS3/3/4.6-3S5 under DC-premagnetization Z (ohms) Figure 16. Impedance vs. frequency for BDS3/3/4.6-4S60 under DC-premagnetization Impedance Curves BDS3/3/4.6-4S3 Z (ohms) SMD Beads Figure 18. Impedance vs. frequency for BDS3/3/4.6-4S3 under DC-premagnetization .0 .0 .0 Z (ohms) .0 Figure 19. Impedance vs. frequency for BDS3/3/8.9-3S1 under DC-premagnetization .0 .0 .0 Z (ohms) .0 Figure 20. Impedance vs. frequency for BDS3/3/8.9-4S2 under DC-premagnetization 13 SMD Beads Impedance Curves .0 .0 .0 Figure 21. Impedance vs. frequency for BDS4.6/3/8.9-4S2 under DC-premagnetization Z (ohms) .0 SMD Beads Damping Curves 4.2.7 TYPICAL DAMPING CURVES .0 .0 .0 IL (dB) .0 Figure 22. Attenuation vs. frequency for BDS3/1.8/5.3-3S1 under DC-premagnetization .0 .0 .0 IL (dB) .0 Figure 23. Attenuation vs. frequency for BDS3/1.8/5.3-4S2 under DC-premagnetization .0 .0 .0 IL (dB) .0 Figure 24. Attenuation vs. frequency for BDS3/3/4.6-3S1 under DC-premagnetization 15 SMD Beads Damping Curves .0 .0 .0 IL (dB) .0 IL (dB) Figure 25. Attenuation vs. frequency for BDS3/3/4.6-4S2 under DC-premagnetization IL (dB) Figure 26. Attenuation vs. frequency for BDS3/3/4.6-4S60 under DC-premagnetization Figure 27. Attenuation vs. frequency for BDS3/3/4.6-3S5 under DC-premagnetization Damping Curves IL (dB) SMD Beads Figure 28. Attenuation vs. frequency for BDS3/3/4.6-4S3 under DC-premagnetization .0 .0 .0 IL (dB) .0 Figure 29. Attenuation vs. frequency for BDS3/3/8.9-3S1 under DC-premagnetization .0 .0 .0 IL (dB) .0 Figure 30. Attenuation vs. frequency for BDS3/3/8.9-4S2 under DC-premagnetization 17 SMD Beads Damping Curves .0 .0 .0 Fig 31. Attenuation vs. frequency for BDS4.6/3/8.9-4S2 under DC-premagnetization IL (dB) .0 SMD Common Mode Chokes 5.0 OPERATING PRINCIPLE OF SMD COMMON MODE CHOKES Interference propagating via supply or signal lines can be suppressed by placing a high impedance in series. This can be provided by a ferrite inductor. However, saturation by the supply current can be a problem. Remedies are a low permeability material or a gapped / open magnetic circuit. The disadvantage is the large number of turns required to achieve the required inductance, leading to high copper losses. With standard suppression methods in a signal path, the wanted signal is often suppressed along with the interference, and in many modern applications (EDP for instance) this leads to unacceptable loss of signal. This can be overcome with current compensation, based on the fact that supply or signal currents in both lines are opposite and have equal magnitude. In Ferroxcube new interference-suppression beads, a pair of conductors within a single soft-ferrite block are connected along their lengths by an air gap. Common-mode signals - interference signals passing in the same direction along the input and output channels of a device (an IC for instance) serve to reinforce the magnetic flux around both conductor, and are therefore attenuated. In contrast, the wanted signal passing along the input and output channel serves to cancel the flux around the conductors and therefore passes unattenuated. General, Product and Type Specification 5.1 PRODUCT APPLICATION APPLICATIONS: These common mode chokes are available in 4 sizes in 4S2 material with 2 different winding configurations. In combination with appropriate tracks on the PCB the products can also serve as: * EMI suppression * Supply line filtering * Data line filtering * Multi-Turn Choke * Transformer e.g. CMS2-5.6/3/4.8-4S2-Z (1) (2)(3)(4)(5) (6) (7) The main application areas for the SMD common mode choke can be found in e.g.: (1) Product type (CMS=Common Mode Surface mountable choke) (2) Number of strips (3) Width nominal (in mm) (4) Height maximum including wire (in mm) (5) Length nominal including wire (in mm) (6) Material grade (7) -Z lead-free version* * Electronic data processing * Telecommunication * Consumer electronics * Domestic appliances TYPE DESCRIPTION: *Note: Not lead-free old version available depending on stock.All new codes are leadfree (not -Z included on type description). ORDERING CODE (12 NC): e.g. 433003055761 Figure 32. SMD Common Mode Choke 5.2 PRODUCT SPECIFICATON The first 11 digits of the 12 NC are sufficient to order the desired SMD commond mode choke. SMD common mode chokes are delivered taped and reeled, ready for use on automatic mounting machines. 5.2.1 GENERAL SPECIFICATION FEATURES: * Resistant to mechanical shocks and pressure * High resistivity material * Low tolerances of mechanical dimensions enable automatic mounting * Flat sides to improve handling by automatic placement machines * Low leakage inductance * Suitable for different functions, depending on PCB connections 19 SMD Common Mode Chokes General, Product and Type Specification 5.2.2 SHAPE AND DIMENSIONS a-CMS2-5.6/3/8.9 a-CMS2-5.6/3/4.8 a-CMS4-11/3/8.9 b-CMS4-11/3/4.8 Figure 33. SMD common mode chokes dimensions (in millimeters) 5.2.3 ELECTRICAL CHARACTERISTICS TYPE Remark IMPEDANCE [] Mass AT FREQUENCY [MHz] 30 100 300 (g) CMS2-5.6/3/4.8-4S2 - 23 35 50 ~ 0.3 CMS2-5.6/3/8.9-3S4 - 45 65 - ~ 0.3 CMS2-5.6/3/8.9-4S2 - 38 60 85 ~ 0.3 CMS4-11/3/4.8-4S2 CMS4-11/3/8.9-4S2 Inner channel 13 23 42 Outer channel 13 23 42 Inner channel 23 45 82 Outer channel 27 58 97 *Note: Typical impedance values measured at 25C with Agilent-4191A impedance analyzer. |Z|min is -20% typical specified. ~ 0.6 ~ 0.6 Table 11. SMD common mode chokes electrical characteristics* SMD Common Mode Chokes TYPE General, Product and Type Specification Maximum Vdc DC resistance Volts (m) 25 Imax (A) 125 CMS2-5.6/3/4.8-4S2 60 < 0.6 10 8.5 CMS2-5.6/3/8.9-3S4 60 < 0.6 10 8.5 CMS2-5.6/3/8.9-4S2 60 < 0.6 10 8.5 CMS4-11/3/4.8-4S2 60 < 0.6 10 8.5 CMS4-11/3/8.9-4S2 60 < 0.6 10 8.5 Table 12. SMD Common mode Choke electrical characteristics 5.2.4 PACKAGING AND ORDERING CODES The SMD Common mode chokes are delivered taped and reeled, ready for use in automatic mounting machines. The packaging is according to IEC 286-A and EIA 481-A TYPE PACKING QUANTITY ORDERING CODE RoHS [PCS / REEL] [12 NC] CMS2-5.6/3/8.9-4S2-Z 2500 43300305576_ yes CMS2-5.6/3/8.9-3S4-Z 2500 43300305575_ yes CMS2-5.6/3/4.8-4S2-Z 2500 43300305574_ yes CMS4-11/3/4.8-4S2-Z 2500 43300305565_ yes CMS4-11/3/8.9-4S2-Z 2500 43300305577- yes CMS2-5.6/3/8.9-4S2 2500 43300304630_ no* CMS2-5.6/3/8.9-3S4 2500 43300305575_ no* Table 13. SMD common mode chokes packaging quantities and ordering code * Check disponibility. Upon request. 5.2.5 BLISTER TAPE AND REEL DIMENSIONS SIZE DIMMENSIONS (mm) CMS2-5.6/3/4.8 CMS2-5.6/3/8.9 CMS4-11/3/4.8 CMS4-11/3/8.9 A0 5.26 5.99 5.23 10.13 B0 6.07 9.09 11.18 11.56 K0 3.18 3.18 4.5 4.5 T 0.3 0.33 0.34 0.36 W 12.0 16.0 24.0 24.0 E 1.75 1.75 1.75 1.75 F 5.5 7.5 11.75 11.5 D0 1.5 1.5 1.5 1.5 D1 > 1.5 > 1.5 > 1.5 > 1.5 P0 4.0 4.0 4.0 4.0 P1 8.0 8.0 8.0 16.0 P2 2.0 2.0 2.0 2.0 Table 14. Physical dimensions of blister tape (in millimeters)* *Note: Figure 5 for reference detailed dimensions. 21 SMD Common Mode Chokes SIZE General, Product and Type Specification DIMENSIONS (mm) A N W1 W2 12 330 100 0.5 12.4 16.4 16 330 100 0.5 16.4 20.4 24 330 100 0.5 16.4 28.4 Table 15. Physical dimensions of reel (in millimeters)* *Note: Figure 7 for reference detailed dimensions. 5.2.6 RECOMMENDED SOLDER LANDS Figure 34a. Solder lands for reflow soldering of CMS2-5.6/3/4.8 Figure 34b. Solder lands for wave soldering of CMS2-5.6/3/4.8 Figure 34a. Figure 34b. Figure 35a. Solder lands for reflow soldering of CMS2-5.6/3/8.9 Figure 35b. Solder lands for wave soldering of CMS2-5.6/3/8.9 Figure 35a. Figure 35b. Figure 36a. Solder lands for reflow soldering of CMS4-11/3/4.8 Figure 36b. Solder lands for wave soldering of CMS4-11/3/4.8 Figure 36a. Figure 36b. SMD Common Mode Chokes Impedance Curves CMS2-5.6/3/4.8-4S2 Z (ohms) 5.2.7 TYPICAL IMPEDANCE CURVES CMS2-5.6/3/8.9-3S4 Z (ohms) Figure 37. Z graph CMS2-5.6/3/4.8-4S2 (1 and 2 turns) Z (ohms) Figure 38. Z graph CMS2-5.6/3/4.8-3S4 (1 and 2 turns) CMS2-5.6/3/8.9-3S4 Figure 39. Z graph CMS2-5.6/3/8.9-3S4 (1 and 2 turns) 23 Impedance Curves Z (ohms) SMD Common Mode Chokes Z (ohms) Figure 40. Z graph CMS4-11/3/4.8-4S2 CMS4-11/3/8.9-4S2 Figure 41. Z graph CMS4-11/3/8.9-4S2 SMD Wide Band Chokes 6.0 OPERATING PRINCIPLE OF SMD WIDE BAND CHOKES SMD wide-band chokes are an alternative to a SMD bead when more impedance or damping is required.The design of this product is based on our well-known range of through-hole wide-band chokes. In these products the conductor wire is wound through holes in a multihole ferrite core, thus separating them physically and reducing coil capacitance. The result is a high impedance over a wide frequency range, a welcome feature for many interference problems. The present SMD design preserves the excellent properties and reliability of the original wide-band chokes by keeping the number of electrical interfaces to an absolute minimum. General, Product and Type Specification 6.2 PRODUCT SPECIFICATON TYPE DESCRIPTION: 6.2.1 GENERAL SPECIFICATION e.g.WBS2.5-5/4.8/10-4B1-Z (1) (2) (3)(4) (5)(6) (7) FEATURES: * Low leakage inductance due to closed magnetic circuit * Small mechanical tolerances enable automatic mounting * Flat sides to improve handling by automatic placement machines * Reliability of simple design * Single wire construction without extra electrical interfaces * Resistant to mechanical shocks and pressure * Resistant to thermal mismatch because of flexible wire connections (1) Product type (WBS=Wide Band choke for Surface mounting) (2) Number of turns (3) Width nominal (in mm) (4) Height maximum including wire (in mm) (5) Length nominal including wire (in mm) (6) Material grade (7) Lead-free version* *Note: Not lead-free old version available depending on stock.All new codes are leadfree (not -Z included on prime name) APPLICATIONS: ORDERING CODE (12 NC): 6.1 PRODUCT APPLICATION SMD wide-band chokes are available in 3S4 and 4B1material with different winding configurations offering Z values according for each needed. As SMD beads and common mode chokes, the SMD wide-bands chokes are used in main electronics appliances: * EMI suppression * Damping of parasitic oscillations APPLICABLE MATERIALS: * 3S4 covers medium frequencies up to 300 MHz * 4B1 covers higher frequencies up to 1000 MHz e.g. 433003041991 The first 11 digits of the 12 NC are sufficient to order the desired SMD wide band choke. SMD wide band chokes are delivered taped and reeled, ready for use on automatic mounting machines. * Electronic data processing * Telecommunication * Consumer electronics * Domestic appliances Figure 42. SMD wide-band chokes 25 SMD Wide Band Chokes General, Product and Type Description 6.2.2 SHAPE AND DIMENSIONS Figure 43. SMD wide-band chokes dimensions (in millimeters) SMD Wide Band Chokes General, Product and Type Description 6.2.3 ELECTRICAL CHARACTERISTICS TYPE 10 25 50 100 300 - 400 430 - ~ 0.9 WBS1.5-5/4.8/10-4B1 - 275 - 500 350 ~ 0.9 WBS2.5-5/4.8/10-3S4 300 - 625 600 - ~ 0.9 WBS2.5-5/4.8/10-4B1 - 485 - 850 350 ~ 0.9 TYPE DC resistance Volts (m) 25 125 60 < 7.5 5 4.2 WBS1.5-5/4.8/10-4B1 60 < 7.5 5 4.2 WBS2.5-5/4.8/10-3S4 60 <9 5 4.2 WBS2.5-5/4.8/10-4B1 60 <9 5 4.2 6.2.4 PACKAGING AND ORDERING CODES TYPE Table 18. SMD wide-band chokes packaging and ordering codes. (g) Maximum Vdc WBS1.5-5/4.8/10-3S4 Table 17. SMD wide-band chokes electrical characteristics Mass 230 WBS1.5-5/4.8/10-3S4 Table 16. SMD wide-band chokes electrical characteristics. IMPEDANCE [] AT FREQUENCY [MHz] Imax (A) The SMD wide-band chokes are delivered taped and reeled, ready for use in automatic mounting machines. The packaging is according to IEC 286-A and EIA 481-A PACKING QUANTITY ORDERING CODE [PCS / REEL] [12 NC] WBS1.5-5/4.8/10-4B1 1650 43300304177_ WBS1.5-5/4.8/10-3S4 1650 43300304176_ WBS1.5-5/10-3S4-Z 1650 43300306901_ WBS2.5-5/4.8/10-4B1 1650 43300304168_ WBS2.5-5/10-4B1-Z 1650 43300306900_ WBS2.5-5/4.8/10-3S4 1650 43300304166- WBS2.5-5/10-3S4-Z 1650 43300304199_ WBSM2.5-5/4.8/10-4B1 1680 43300304195_ 27 SMD Wide Band Chokes General, Product and Type Description 6.2.5 BLISTER TAPE AND REEL DIMENSIONS SIZE Table 19. Physical dimensions of blister tape (in millimeters)* DIMENSIONS (mm) WBS1.5-5/4.8/10 WBS2.5-5/4.8/10 A0 5.51 5.51 B0 11 11 K0 5.03 5.03 T 0.36 0.36 W 24 24 E 1.75 1.75 F 11.5 11.5 D0 1.5 1.5 D1 1.5 1.5 P0 4.0 4.0 P1 8.0 8.0 P2 2.0 2.0 *Note: Figure 5 for reference detailed dimensions. SIZE Table 20. Physical dimensions of reel (in millimeters)* 24 DIMENSIONS (mm) A N W1 W2 330 100 0.5 24.4 28.4 *Note: Figure 7 for reference detailed dimensions. 6.2.6 RECOMMENDED SOLDER LANDS Figure 44. Recommended solder lands for SMD wide-band chokes WBS1.5-5/4.8/10 and WBS2.55/4.8/10 SMD Wide Band Chokes Impedance Curves Z (ohms) 6.2.7 TYPICAL IMPEDANCE CURVES Z (ohms) Figure 45. Z graph WBS1.5-5/4.8/10-3S4 and WBC1.5-5/4.8/10-4B1 Figure 46 Z graph WBS2.5-5/4.8/10-3S4 and WBC2.5-5/4.8/10-4B1 29 SMD Wide Band Chokes Impedance Curves .0 .0 .0 Z (ohms) .0 Figure 47. Impedance vs. frequency for WBS1.55/4.8/10-3S4 under DC-premagnetization .0 .0 .0 Z (ohms) .0 Figure 48. Impedance vs. frequency for WBS1.55/4.8/10-4S2 under DC-premagnetization .0 .0 .0 Figure 49. Impedance vs. frequency for WBS2.55/4.8/10-3S4 under DC-premagnetization Z (ohms) .0 SMD Wide Band Chokes Impedance Curves .0 .0 .0 Z (ohms) .0 Figure 50. Impedance vs. frequency for WBS2.55/4.8/10-4S2 under DC-premagnetization 31 SMD Wide Band Chokes .0 .0 .0 .0 IL (dB) 6.2.8 TYPICAL DAMPING CURVES Damping Curves Figure 51. Attenuation vs. frequency for WBS1.55/4.8/10-3S4 under DC-premagnetization .0 .0 .0 IL (dB) .0 Figure 52. Attenuation vs. frequency for WBS1.55/4.8/10-4S2 under DC_premagnetization .0 .0 .0 Figure 53. Attenuation vs. frequency for WBS2.55/4.8/10-3S4 under DC_premagnetization IL (dB) .0 SMD Wide Band Chokes Damping Curves .0 .0 .0 IL (dB) .0 Figure 54. Attenuation vs. frequency for WBS2.5-5/4.8/10-4S2 under DC_premagnetization 33 Gapped SMD Beads 7.0 GAPPED SMD BEADS FOR POWER INDUCTORS Traditional power supply architectures for PCs are facing problems with the latest generation of integrated circuits. Lower voltages and higher currents lead to increasing losses in supply lines and sensivity to interference. On top of this, fast microprocessors introduce high frequency transients which are difficult to regulate with a voltage regulator module (VRM) form a distant main supply. General, Product and Type Specification Our lowest loss general power material, 3C96 is an excellent choice to use in high-frequency output inductors. With a small ripple only, it can work at much higher switching frequency then it would as transformer material, preserving its highest higher saturation over real high-frequency transformer materials. 7.2 PRODUCT SPECIFICATON 7.2.1 GENERAL SPECIFICATION 7.1 PRODUCT APPLICATION FEATURES: The fundamental solution utilizes and intermediate voltage and distributed point of load (POL) converters. These are small dc/dc converters, placed close to the load on the PCB. Ferroxcube now introduces gapped SMD beads, perfectly suitable for the POL concept. They are small inductors typically meant to serve as output inductor in buck / boost stage and feature the state of the art power material 3C96. Depending on relative ripple current, switching frequencies up to 1 MHz are possible to realize compact geometries. Saturation rated current goes up to 20 A and the dc resistance is less than 1 m|. * Very suitable for POL converter concept * High switching frequency, up to 1 MHz * High current rating, up to 20 A * Low dc resistance, less than 1 m * Small size (1812 and 3512 * SMD mountable * Lead-free / RoHs compliant APPLICATIONS: * Output inductor dc/dc converters * EMI suppression with high current TYPE DESCRIPTION: e.g. BDS3/3/4.6-3C96-A75 (1)(2) (3) (4) (5) (6) (1) Product type (BDS = Bead for Surface mounting) (2) Width (in mm) (3) Height (in mm) (4) Length (in mm) (5) Material grade (6) AL inductor value ORDERING CODE (12 NC): e.g. 433003072431 The first 11 digits of the 12 NC are sufficient to order the desired SMD wide band choke. SMD wide band chokes are delivered taped and reeled, ready for use on automatic mounting machines. 7.2.2 SHAPE AND DIMENSIONS These gapped beads are available in 2 sizes (1812 and 3512), packed in tape on reel, and they are SMD mountable. Furthermore, they are lead-free and fully comply with the RoHS regulations on hazardous substances. Figure 56. Gapped SMD chip beads dimensions (in millimeters) Figure 55. Gapped SMD beads Gapped SMD Beads General, Product and Type Specification 7.2.3 ELECTRICAL CHARACTERISTICS TYPE AL Mass nH / t^2 (g) BDS3/3/4.6-3C96-A50 50 +- 20% ~ 0.15 BDS3/3/4.6-3C96-A75 75 +- 20% ~ 0.15 BDS4.6/3/8.9-A100 100 +- 20% ~ 0.15 BDS4.6/3/8.9-A150 150 +- 20% ~ 0.15 Table 21. Gapped SMD beads electrical characteristics Figure 57. Saturation Curves gapped SMD beads TYPE BDS3/3/4.6-3C96-A50 Maximum Vdc DC resistance Isat* Imax (A) Volts (m) mA 25 125 60 < 0.6 20 20 17 BDS3/3/4.6-3C96-A75 60 < 0.6 15 20 17 BDS4.6/3/8.9-A100 60 < 1.0 20 20 17 BDS4.6/3/8.9-A150 60 < 1.0 20 20 17 Table 22. Chip bead electrical characteristics* *Note: Isat is defined as the saturation rated current 35 Gapped SMD Beads General, Product and Type Specification 7.2.4 PACKAGING AND ORDERING CODES TYPE The Capped SMD beads are delivered taped and reeled, ready for use in automatic mounting machines. The packaging is according to IEC 286-A and EIA 481-A PACKING QUANTITY ORDERING CODE [PCS / REEL] [12 NC] 3000 43300307234_ BDS3/3/4.6-3C96-A50 BDS3/3/4.6-3C96-A75 3000 43300307235_ BDS4.6/3/8.9-A100 2400 43300307243_ BDS4.6/3/8.9-A150 2400 43300307244_ Table 23. Gapped SMD beads packaging quantities and ordering code 7.2.5 BLISTER TAPE AND REEL DIMMENSIONS SIZE DIMENSIONS (mm) BDS3/3/4.6 BDS4.6/3/8.9 A0 3.45 0.1 3.25 0.1 B0 5.1 0.1 9.4 0.1 K0 3.1 0.1 3.1 0.1 T 0.25 0.05 0.3 0.05 W 12.0 0.3 16.0 0.3 E 1.75 0.1 1.75 0.1 F 5.5 0.05 7.5 0.05 D0 1.5 + 0.1 1.5 + 0.1 D1 > 1.5 > 1.5 P0 4.0 0.1 4.0 0.1 P1 8.0 0.1 8.0 0.1 P2 2.0 0.05 2.0 0.1 Table 24. Physical dimensions of blister tape (in millimeters) *Note: Figure 5 for reference detailed dimensions. SIZE DIMENSIONS (mm) A N W1 W2 12 3.30 100 0.5 12.4 16.4 16 2.30 100 0.5 16.4 20.4 *Note: Figure 7 for reference detailed dimensions. Table 24. Physical dimensions of reel (in millimeters) Gapped SMD Beads General, Product and Type Specification 7.2.6 RECOMMENDED SOLDER LANDS Figure 58a. Solder lands reflow soldering SHAPE Figure 58b. Solder lands wave soldering Reflow soldering Wave soldering A B C D A B C D E BDS3/3/4.6 2.8 6.4 1.8 3.3 2.0 6.4 2.2 3.0 0.8 BDS4.6/3/8.9 7.0 10.8 1.9 3.3 6.0 12.2 3.1 3.0 2.5 Table 26. Dimensions (mm) of solder lands 37 SMD Beads and Chokes Soldering 8.0 SOLDERING CURVES Our surface mountable beads, common mode and wide-band chokes can be placed and soldered onto any normal printed circuit board or hybrid circuits. Suitable methods include those where the device is immersed in solder, wave soldering, reflow methods where the solder and device are heated together, and in vapor phase soldering. The robust construction of these SMD components enables them to be totally immersed in a solder bath at 255 up to 10 seconds for lead parts and up to 30 seconds at 260 for lead-free products without damage. This facilitates the mounting of leaded discrete components on the components side of a board after surface mountable beads or chokes have been attached to the side to be soldered, thus making a 'mixed print' board. Figure 59. Reflow soldering curve Typical temperature / time curves for different soldering methods are shown in next figures 59, 60, 61 for leaded products and 62 for lead-free parts. They show a preheating stage, followed by the soldering process at which the SMD components are fully subjected to the soldering temperature, and then finally cooling. Beads, common mode and wide-band chokes are able to withstand both the rapid rise in temperature, prior to soldering and the high temperature of the soldering process Figure 60.Wave soldering Figure 61.Vapor phase soldering SMD Beads and Chokes Soldering Figure 62. Reflow soldering profile for lead-free types according to JEDEC STD. 39 SMD Beads and Chokes Maximun Current 9.0 MAXIMUM CURRENT LIMITS IN FUNCTION OF TEMPERATURE Imax (A) Next graphs shows maximum current that could be applied to Ferroxcube SMD parts and Rdc correspondat temperature variability: RDC (mohms) Figure 63. Imax. in function of temperature for SMD beads, common mode and wide band chokes. Figure 64. RDC in function of temperature for SMD beads, common mode and wide band chokes