Applied voltage for designing POSCAP OS-CON Line-up 25.0 V Considerations when using in industrial equipment Applied voltage
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- Randolf Day
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1
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3 OS-CONPOSCAP
4 POSCAP OS-CON Do not use the capacitor in the following environments.
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7 INDEX
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10 Important OS-CON OS-CON OS-CON OS-CON OS-CON OS-CON 1 2
11 1 OS-CON 1, ,000 (Hrs.) 1, ,000 (Hrs.) 2 OS-CON 3 OS-CON OS-CON OS-CON OS-CON 4 OS-CON OS-CONOS-CON OS-CON
12 OS-CON OS-CON OS-CON OS-CON OS-CON OS-CON OS-CON OS-CON 5 6 7
13 OS-CON OS-CON OS-CON
14 F12 E12 F8 E7 C6 B6 A5 F12 E12 E7 C6 B6 F12 E12 F8 E7 C6 F8 E7 C6 B6 A5 E7 C6 C55 C5 F8 E7 C6 B6 F13 E13 E12 E9 E7 C9 C6 C55 B9 F13 E12 F8 E7 C6 F13 E12 F8 E7 C6 F12 C10 C6 B6 F13 E7 C55 F12 E12 E7 C6 B6 New New C6 E12 New New
15 Size Size Size Size Size Size Size Size Size Size Size Size Size Size Size Size Size Size Size Size Size Size Size Size New New New New
16 New Example Series name Size ESR value unit:m)
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20 Mounting parts Direction of unreeling
21 R1.0 Direction of unreeling W1 W Direction of unreeling
22 Example Example
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25 1. Basic structure of OS-CON OS-CON has a basic construction similar to an aluminum electrolytic capacitor. A distinctive difference lies in electrolyte. Aluminum electrolytic capacitor OS-CON 1-1. Basic construction Sealing rubber Anode terminal Cathode aluminum foil Separator sheet Anode aluminum foil Aluminum case Cathode terminal Separator sheet impregnated with electrolytic solution. Separator sheet impregnated with conductive polymer. Dielectric oxidization leather film (aluminum oxide) Enlarged section diagram of the element Element Aluminum case Sealing rubber Electrolyte impregnating separator sheet (Electrolyte serves as the actual cathode.) Radial lead type Cathode terminal Anode terminal Liquid electrolyte Solid electrolyte Surface mount type Anode terminal Cathode terminal Plastic spacer Characteristics between OS-CON and aluminum electrolytic capacitor due to a difference in electrolyte Conductivity Reliability, lifespan Anode aluminum foil Separator sheet Aluminum electrolytic capacitor 3(mS/cm) Difficult to lower ESR due to low conductivity ESR augments, in particular, in low temperature conditions Liquid electrolyte is evaporable at high temperature Static capacitance is on the decline at high temperature Limited lifespan resulting from dry-up Major fluctuations in temperature characteristics Cathode aluminum foil OS-CON 3,000(mS/cm) The highest electronic conductivity, realizing super low ESR. ESR is stable in low temperature conditions Little evaporation due to solid electrolyte Little decrease in static capacitance Long lifespan even at high temperature Very minor fluctuations in temperature characteristics Temperature coefficient (for lifespan) 2 times by 10 reduction 10 times by 20 reduction 105/2,000h/8,000h 105/2,000h/20,000h 2. OS-CON Manufacturing Method
26 1. OS-CON Electrical characteristics 1-1. Frequency characteristics Fig.A Impedance frequency characteristics (OS-CON vs other types) A : OS-CON 16V/56μF (φ8x6.9l:347 ) B : AI-E (Low impedance) 16V/47μF (φ6.3x7l:218 ) C : Ta-cap 16V/47μF (φ6.3x11l:311 ) D : AI-E (Low impedance) 16V/1,000μF (φ16x25l:5,024 ) 1K 10K 100K 1M 10M 20M Frequency (Hz) B C D A (at 25 C) Fig.B Impedance & ESR frequency characteristics (several OS-CON models) 1K 10K 100K 1M 10M 20M FrequencyHz OS-CON is an electrolytic capacitor that has excellent frequency characteristics. It improves ESR greatly, and provides the excellent frequency characteristics because OS-CON use a high conductive polymer as electrolyte. Fig.A: The OS-CONs frequency characteristic shows a nearly ideal curve. When compared at 100kHz, OS-CON 56μF, and low impedance aluminum electrolytic capacitor 1,000μF nearly have the same feature. Fig.B: The resonance point of the OS-CON is at 100kHz to 10MHz. The ESR is an extremely small value approximately 5mΩ at 100kHz of 560μF. Impedance (Ω) ESR (Ω) OS-CON A35SVPD8R2M B16SVPA82MAA C4SEPC560MX D2SEPC2700M (at 25 C) Impedance ESR 1-2. Characteristics at high temperature and low temperature Fig.A ESR temperature characteristics (OS-CON vs other types) Temperature characteristics Equivalent series resistance at 100kHz Al 10μF Fig.B Capacitance temperature characteristics (OS-CON vs other types) Temperature characteristics Capacitance change at 120kHz 10μF Ta Al ESR (Ω) Ta OS Capacitance change (%) CR(X5P) CR(X5U) 0.01 CR(X5U) CR(X5P) Temperature () Temperature () OS-CON s Characteristics at high temperature and low temperature is that it features little change in temperature for the ESR. What ESR changes a little against temperature means that noise clearing ability changes a little against temperature as well. The OS-CON is suitable for outdoor apparatus. OS=OS-CON AI=AL-E. Cap Ta =TantalumCap. CR(X5P) =Cera Cap.(X5P Type) CR(X5U) =Cera Cap.(X5U Type) Purple Blue Green Red Pink
27 1-3. Bias characteristics (a) Capacitance Capacitance change (%) OS.1 =OS-CON(10SVP10M) Purple OS.2 =OS-CON(25SVPD10M) Light Purple CR(X5P) =Cera Cap. Red (X5P Type ; 10V/10μF) CR(X5U) =Cera Cap. Pink (X5U Type ; 50V/10μF) When voltage is applied to ceramic capacitors, they show a bias characteristics where static capacitance is reduced. Our OS-CON product, however, will show no reduction in capacitance for applied voltage within its rating. (b) Impedance, ESR Bias characteristics of OS-CON & ceramic capacitors Multi-layer ceramic capacitor (25V/4.7μF) OS-CON (25SVPD10M) 0V bias 0V bias 100 OS.1 Bias voltage characteristics CR(X5P) Capacitance change at 120Hz 10μF Bias voltage (V) OS.2 CR(X5U) 100 ESR, Impedance(Ω) ESR, Impedance(Ω) ,000 10,000 Frequency(kHz) 100 Multi-layer ceramic capacitor (25V/4.7μF) 20V bias ,000 10,000 Frequency(kHz) 100 OS-CON (25SVPD10M) 20V bias ESR, Impedance(Ω) ESR, Impedance(Ω) Frequency(kHz) 1,000 10, ESR & impedance of ceramic capacitors change largely between 300kHz to 1MHz. As for OS-CON, neither ESR nor impedance changes. Frequency(kHz) 1,000 10,000
28 1-4. Allowable Ripple Current Ripple Current (Arms) V/33μF Allowable Ripple Current (100kHz45 C) V/47μF V/100μF V/220μF OS-CON (SVP series) AI-E. Cap. (Low Impedance) Ta.Cap. (Low ESR) Samples of SVP series are approximate models. Light Purple When selecting smoothing capacitors for power supply, the allowable ripple current of the capacitor is one of criterion. The allowable value of ripple current is decided by the generated heat of the capacitor, this heating is due to the ESR. Since a large ESR capacitor generates larger heat value, it can not make the flow of ripple current greater. Compared to other electrolytic capacitors, ESR of OS-CON is so small that it can allow far more ripple currents. Blue Green 1-5. ESL Characteristics OS-CON is a capacitor of high performance with low ESR and large capacitance. Recently in circuit technologies, the constituent of ESL is important in the domain of the high frequency with that of electronic equipment. (a) Eqivalent series circuit of capacitor ESL (b)approximate ESL values of SEPC series (unitnh) Size Code C6 C9 E9 E12 E13 F13 at 10 MHz at 40 MHz Measuring position: root of lead terminal Measuring method: Based on JEITA RC-2003 All values on left figure are not guaranteed but reference. Please contact SANYO for details of measurement.
29 1. Temperature acceleration test (Endurance) Capacitance change 155 Estimation of life time OS-CON 105 2,000h 95 6,324h 85 20,000h 75 63,245h Capacitance change at 120Hz 10V/22μF ,000 Time (h) Guarantee temperature of OS-CON is 105, except for SEQP, SVQP and SVPD series. Time is an estimate, not guaranteed Aluminum electrolytic capacitor 105 2,000h 95 4,000h 85 8,000h 75 16,000h The decrease in capacitance of OS-CON depends on temperature. The left figure shows the speed of capacitance decrease at each temperature. This graph indicates that temperature coefficient of OS-CON lifetime is 10 times by 20 reduction. Compare with this, aluminum capacitor lifetime is 2 times by 10 reduction. Even if OS-CON and an aluminum electrolytic capacitor are guaranteed on 2,000 hours at 105, The life span results in differences as temperature drops. OS-CON has a longer life span compared with an aluminum electrolytic capacitor. 2. Self-Healing Mechanism The dielectric substance of the OS-CON is an oxide film that has non-conductivity formed on the surface of an anode aluminum foil. Since the oxide film is solid and thin film, leakage current may temporary increase if microcrack generates by external impact (mechanical, heat, electricity etc.). (figure (b)) At this time, Joule heat is generated by the leakage current flows as figure (c), and the electrolyte causes partially insulation because of the heat. (figure (d)) The leakage current of the crack part is suppressed due to this function. This is called a self-healing.
30 3. Reliability presumption of life for the OS-CON The capacitance of OS-CON is getting smaller as time goes by on Endurance. This means wear-failure of OS-CON is open mode, which is a main failure factor. The life time is different by each operating temperature and self-heating by ripple current. The following formula outline could make it possible to estimate the presumptive lifetime of OS-CON at ambient temperature Tx (). The result of the following page estimation is not guaranteed but presumptive values based on actual measurement. The estimated life-span is limited up to 15 years Calculation formula of estimated life expectancy Lx=Lo10 ToTx 20 Lx : Life expectance (h) in actual use (temperature Tx) Lo : Guaranteed (h) at maximum temperature in use To : Maximum operating temperature () Tx : Temperature in actual use (ambient temperature of OS-CON) () Please contact us about the presumptive lifetime of OS-CON used at the ambient temperature of 125 (SVQP,SVPD,SEQP series), when the heat-proof characteristics of sealing rubber have to be factored in. The estimated life expectancy of conductive polymer electrolyte type can be calculated without consideration of self-heating under application of the ripple current SVPS series: Self-heating temperature by allowance ripple current () The self-heating temperature under application of the rated ripple current series size Self-heating SVP, SVPA, SVPC, SVPS SVP, SVPA, SVPC, SVPS SVPB, SVPE, SVPF, SEP, SEPC, SEPF SVQP, SEQP, SVPD Except for A5, B6 A5,B6 All All approx. 20 approx. 10 approx. 20 approx. 2
31 4. Conductive polymer type (16SVP39M) 4-1. Endurance (105 C, 16V applied) Characteristics on Endurance Capacitance change% tanδat 120Hz ESRmΩ at 100kHz Leakage current A at 16V30s ,000 10, ,000 10, ,000 10, ,000 10,000 Little change in characteristics can be seen after 10,000 hours because of adoption of conductive polymer that excels in thermal stability Damp heat (60 C90% RH, without load) Characteristics on damp heat Capacitance change% tanδat 120Hz ESRmΩ at 100kHz Leakage current A at 16V30s ,000 10, ,000 10, ,000 10, ,000 10,000 Little change in characteristics can be seen after 10,000h hours in a high temperature and damp heat environment because of the excellent thermal stability of conductive polymer.
32 003 SVPF Update Update
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34 003 PE
35 C a b
36 003 SVPS
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38 003 SVPD 47 35
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40 003 SVPC
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42 003 PB 56 10
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44 003 SVPA 47 20
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46 003 QP 22 20
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48 003 SVP 82 16
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50 223 SEPF Update Update
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52 003 SEPC Update Update
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54 003 SEQP 15 32
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56 003 SEP 820 6
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