Type 255D Vishay Sprague Organic Polymer, Low ESR, Tantalum Capacitors Commercial, Surface Mount Capacitors for Switch Mode Power Supplies and Converters FEATURES • Conductive polymer cathode technology • Low ESR • No-ignition failure mode • EIA standard case sizes • 100% surge current tested PERFORMANCE CHARACTERISTICS Operating Temperature: - 55°C to + 105°C Capacitance Tolerance: ± 20% standard Capacitance Range: 100µF to 220µF Voltage Rating: 4WVDC to 10WVDC DIMENSIONS in inches [millimeters] L W H TH Min. P Tw CASE EIA L W H P Tw TH(Min.) D 7343 0.287 ± 0.012 [7.3 ± 0.3] 0.170 ± 0.012 [4.3 ± 0.3] 0.110 ± 0.012 [2.8 ± 0.3] 0.051 ± 0.012 [1.3 ± 0.3] 0.095 ± 0.012 [2.4 ± 0.1] 0.039 [1.0] www.vishay.com 2 Document Number: 40052 Revision 04-Feb-03 Type 255D Vishay Sprague ORDERING INFORMATION X0 255D 227 MODEL CAPACITANCE 004 CAPACITANCE DC VOLTAGE RATING TOLERANCE @ + 85°C This is expressed in picofarads. The first two digits are the significant figures. The third is the number of zeros to follow. X0 = ± 20% This is expressed in volts. To complete the three-digit block, zeros precede the voltage rating. A decimal point is indicated by an "R" (6R3 = 6.3 volts). D 2 CASE CODE TERMINATION See Ratings and Case Codes Table. 2 = Solderable coating. Standard. _ REEL SIZE AND PACKAGING T = Tape and reel* 7" [178mm] reel W =13" [330mm] reel *Cathode nearest sprocket hole. Note: Preferred Tolerance and Reel size are in bold. Last three characters designate ESR max. Limit in milliohms. RATINGS AND CASE CODES µF 4V 220 D 6.3V 150 10V D 100 D *Preliminary values, contact factory for availability. STANDARD RATINGS CAPACITANCE (µF) CASE CODE PART NUMBER MAX DCL @ +25°C MAX DF @ + 25°C MAX ESR @ 100K Hz (mΩ) MAX RIPPLE 100K Hz IRMS (AMPS) 4WVDC @ + 85°C, 3.2WVDC @ + 105°C, SURGE = 5.2V @ + 85°C, 4.2V @ + 105°C 220* D* 255D227X_004D2_055* 88* 8* 55* 2.0* 220* D* 255D227X_004D2_045* 88* 8* 45* 2.0* 220 D 255D227X_004D2_040 88 8 40 2.0 6.3WVDC @ + 85°C, 5WVDC @ + 105°C, SURGE = 8V @ + 85°C, 5V @ +105°C 150 D 255D157X_6R3D2_055 95 8 55 2.0 150 D 255D157X_6R3D2_045 95 8 45 2.0 10WVDC @ + 85°C, 8WVDC @ + 105°C, SURGE = 13V @ + 85°C, 8V @ +105°C 100 D 255D107X_010D2_065 100 8 65 2.0 100 D 255D107X_010D2_050 100 8 50 2.0 *Preliminary values, contact factory for availability. Document Number: 40052 Revision 04-Feb-03 www.vishay.com 3 Type 255D Vishay Sprague PERFORMANCE CHARACTERISTICS 1. Operating Temperature: Capacitors are designed to operate over the temperature range of - 55°C to +105°C. 5. 1.1 Capacitors may be operated to + 105°C with voltage derating to 0.8 times the + 85°C rating. + 85°C 2. - 55°C ±20% + 105°C RATING WORKING VOLTAGE (V) SURGE VOLTAGE (V) WORKING VOLTAGE (V) SURGE VOLTAGE (V) 4.0 6.3 10.0 5.2 8.0 13.0 3.2 5.0 8.0 4.3 6.5 10.4 DC Working Voltage: The DC working voltage is the maximum operating voltage for continuous duty at the rated temperature. 6. Surge Voltage: The surge DC rating is the maximum voltage to which the capacitors may be subjected under any conditions, including transients and peak ripple at the highest line voltage. 3.1 Surge Voltage Test: Capacitors shall withstand the surge voltage applied in series with a 33 ohm ± 5% resistor at the rate of one-half minute on, one-half minute off, at + 85°C, for 1000 successive test cycles. 3.2 Following the surge voltage test, the dissipation factor shall meet the initial requirements; the capacitance shall not have changed more than ± 20%. The leakage current shall not exceed 150% of the initial value. Capacitance Tolerance: The capacitance of all capacitors shall be within the specified tolerance limits of the normal rating. 4.1 Capacitance measurements shall be made by means of polarized capacitance bridge. The polarizing voltage shall be of such magnitude that there shall be no rever sal of polarity due to the AC component. The maximum voltage applied to capacitors during measurement shall be 2 volts rms at 120Hz at + 25°C. If the AC voltage applied is less than one-half volt rms, no DC bias is required. Accuracy of the bridge shall be within ± 2%. www.vishay.com 4 + 105°C ±30% Dissipation Factor: The dissipation factor, determined from the expression 2πfRC, shall not exceed values listed in the Standard Ratings Table. Leakage Current: Capacitors shall be stabilized at the rated temperature for 30 minutes. Rated voltage shall be applied to capacitors for 5 minutes using a steady source of power (such as a regulated power supply) with 1000 ohm resistor connected in series with the capacitor under test to limit the charging current. Leakage current shall then be measured. 7.1 At + 25°C, the leakage current shall not exceed the value listed in the Standard Ratings Table. 7.2 At + 85°C, the leakage current shall not exceed 10 times the value listed in the Standard Ratings Table. 7.3 At + 105°C, the leakage current , while measured at 0.8 times the rated voltage, shall not exceed 10 times the value listed in the Standard Ratings Table. 8. 4. + 85°C ±20% 6.1 Measurements shall be made by the bridge method at, or referred to, a frequency of 120Hz and a temperature of + 25°C. 7. 3. Capacitance Change With Temperature: The capacitance change with temperature shall not exceed the following percentage of the capacitance measured at + 25°C: at ESR 8.1 ESR (Equivalent Series Resistance) shall not exceed the values listed in the Ratings Table. Measurement shall be made by the bridge method at a frequency of 100kHz and a temperature of + 25°C. 9. Life Test: Capacitors shall withstand rated DC voltage applied at + 85°C for 1000 hours. 9.1 Following the life test, the dissipation factor shall not exceed 1.5 times the initial requirement; the capacitance change shall not exceed ±20%; the leakage current shall not exceed 0.1 CV (3uA). Document Number: 40052 Revision 04-Feb-03 Type 255D Vishay Sprague PERFORMANCE CHARACTERISTICS (Continued) 10. Solderability: Capacitors will meet the solderability requirements of (MIL-STD-202, method 208), ANSI/J-STD-002, Test B. 11. Resistance to Solder Heat: Capacitors will with stand reflow soldering @ + 240°C + 5°C for 10 seconds max. Capacitors should be allowed to remain at ambient conditions for a period of up to 24 hours prior to electrical measurements. 11.1 Following the resistance to solder heat test, capacitance, be within ± 20% of the initial value, the dissipation factor and the DC leakage current shall not exceed the initial value. 12. Terminal Strength: Per IEC-384-3, minimum of 3N shear force. 13. Flammability: Encapsulant materials meet UL94 VO with an oxygen index of 32%. 14. Capacitor Failure Mode: The predominant failure mode for solid tantalum capacitors is increased leakage current resulting in a shorted circuit. Capacitor failure may result from excess forward or reverse DC voltage, surge current, ripple current, thermal shock or excessive temperature. The increase in leakage is caused by a breakdown of the Ta2O5 dielecric. For additional information on leakage failure of solid tantalum chip capacitors, refer to Vishay Sprague Technical Paper, “Leakage Failure Mode in Solid Tantalum Chip Capacitors.” 15 Humidity Test: Capacitors shall withstand 500 hours at + 60°C, 90% to 95% relative humidity, with no voltage applied. 15.1 Following the humidity test, capacitance change shall not exceed -20% to + 40% of the initial value, dissipation factor shall not exceed 150% of the initial requirement; leakage current shall not exceed 0.1CV (9uA). GUIDE TO APPLICATION 1. A-C Ripple Current: The maximum allowable ripple current shall be determined from the formula: Irms = P RESR 2.2 The sum of the negative peak AC voltage plus the applied DC voltage shall not allow a voltage reversal exceeding 10% of the DC working voltage at + 25°C. 2.3 Temperature Derating: If these capacitors are to be operated at temperatures above + 25°C, the permissible rms ripple current or voltage shall be calculated using the derating factors as shown: where, P = Power Dissipation in Watts @ + 25°C as given in the table in Paragraph Number 5 (Power Dissipation). RESR=The capacitor Equivalent Series Resistance at the specified frequency. 2. A-C Ripple Voltage: The maximum allowable ripple voltage shall be determined from the formula: Vrms = 2.4 P RESR or, from the formula: Vrms = Irms x Z where, P = Power Dissipation in Watts @ + 25°C as given in the table in Paragraph Number 5 (Power Dissipation). TEMPERATURE DERATING FACTOR +25°C 1.0 + 85°C 0.9 + 105°C 0.4 Power Dissipation: Power dissipation will be affected by the heat sinking capability of the mounting surface. Non-sinusoidal ripple current may produce heating effects which differ from those shown. It is important that the equivalent Irms value be established when calculating permissible operating levels. (Power Dissipation calculated using +25°C temperature rise). CASE CODE MAXIMUM PERMISSIBLE POWER DISSIPATION @ + 25C (Watts) IN FREE AIR D 0.150 RESR=The capacitor Equivalent Series Resistance at the specified frequency. Z = The capacitor impedance at the specified frequency. 2.1 The sum of the peak AC voltage plus the DC voltage shall not exceed the DC voltage rating of the capacitor. Document Number: 40052 Revision 04-Feb-03 3. Reverse Voltage: These capacitors are capable of withstanding peak voltages in the reverse direction equal to 10% of the DC rating at + 25°C, 5% of the DC rating at + 85°C and 1% of the DC rating at +105°C. www.vishay.com 5 Type 255D Vishay Sprague GUIDE TO APPLICATION 4. 5. Recommended rated working voltage guidelines: APPLICATION VOLTAGE (V) RECOMMENDED CAPACITOR VOLTAGE RATING (V) 2.5 4.0 6.0 4.0 6.3 10.0 8. Printed Circuit Board Materials: The 255D is compatible with commonly used printed circuit board materials (alumina substrates, FR4, FR5, G10, PTFEfluorocarbon and porcelainized steel). Recommended Mounting Pad Geometries: Proper mounting pad geometries are essential for successful solder connections. These dimensions are highly process sensitive and should be designed to minimize component rework due to unacceptable solder joints. The dimensional configurations shown are the recommended pad geometries for both wave and reflow soldering techniques. These dimensions are intended to be a starting point for circuit board designers and may be fine tuned if necessary based upon the peculiarities of the soldering process and/or circuit board design. REFLOW SOLDER PADS* in inches [millimeters) 6. Attachment: 6.1 Solder Paste: The recommended thickness of the solder paste after application is .007" ± .001" [.178mm ± 0.025mm]. Care should be exercised in selecting the solder paste. The metal purity should be high as practical. The flux (in the paste) must be active enough to remove the oxides formed on the metallization prior to the exposure to soldering heat. In practice this can be aided by extending the solder preheat time at temperatures below the liquidous of the solder. 6.2 Soldering: Capacitors can be attached by conventional soldering techniques - vapor phase, infrared reflow, wave soldering and hot plate methods. The Soldering Profile chart shows maximum recommended mended time/temperature conditions for soldering. Attachment with a soldering iron is not recommended due to the difficulty of controlling temperature and time at temperature. If hand soldering is necessary, the soldering iron must never come in contact with the capacitor. Case Code D Temperature Deg. Centigrade 250 130°C Typical 100 50 50 0 0 0 50 100 150 Time (Seconds) www.vishay.com 6 200 250 .118 [3.0] .106 [2.70] .175 [4.45] When using ultrasonic cleaning, the board may resonate if the output power is too high. This vibration can cause cracking or a decrease in the adherenceof the termination. DO NOT EXCEED 9W/L @ 40kHz for 2 minutes. 150 100 Separation (C) 9.1 200 150 Pad Metallization (B) Cleaning (Flux Removal) After Soldering: The 255D is compatible with all commonly used solvents such as TES, TMS, Prelete, Chlorethane, Terpene and aqueous cleaning media. However, CFC/ODS products are not used in the production of these devices and are not recommended. Solvents containing methylene chloride or other epoxy solvents should be avoided since these will attack the epoxy encapsulation material. 250 200 Width (A) 9. 300 240°C Typical E A REFLOW SOLDERING PROFILE 300 D C B Document Number: 40052 Revision 04-Feb-03 Type 255D Vishay Sprague TAPE AND REEL PACKAGING in inches [millimeters] .157 ± .004 [4.0 ± .10] K Max. .059 + .004 - 0.0 [1.5 + .10 - 0.0] .069 ± .004 [1.75 ± .10] .079 ± .002 [2.0 ± .050] .024 [.600] Max. A0 F W K0 B1 Max. P Top Cover Tape D1 Min. Direction of Feed TAPE SIZE B1 (Max.) 12mm 0.323 [8.2] D1 (Min.) F K (Max.) P W A0B0K0 0.059 [1.5] 0.217 ± 0 .002 [5.5 ± .05] 0.177 [4.5] 0.315 ± 0 .004 [8.0 ± 1.0] 0.472 + 0.012 [12.0+.30] Notes: A0B0K0 are determined by component size. The clearance between the component and the cavity must be within .002" [.05mm] minimum to .020" [.50mm] maximum for 8mm tape and .002" [.05mm] minimum to .026" [.65mm] maximum for 12mm tape. . Standard orientation is with the cathode (-) nearest to the sprocket holes per EIA-481-1 and IEC 286-3. Top Cover Tape Thickness Carrier Tape and Reel Specifications: All case codes are available on plastic embossed tape per EIA-481-1. Tape reeling per IEC 286-3 is also available. Standard reel diameter is 7" [178mm]. 13” [330mm] reels are available. The most efficient packaging quantities are full reel increments on a given reel diameter. The quantities shown allow for the sealed empty pockets required to be in conformance with EIA-481-1. Reel size must be specified in the Vishay Sprague® part number. Embossment Cathode (-) Units Per Reel Anode (+) Direction of Feed Document Number: 40052 Revision 04-Feb-03 Case Code Tape Width Component Pitch 7" [178] Reel 13" [330] Reel D 12mm 4mm 500 2500 www.vishay.com 7