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| 型号： | DC-2R5E224U-E |
| 厂商： | Elna America |
| 文件页数： | 116/145页 |
| 文件大小： | 0K |
| 描述： | CAP SUPER 220MF 2.5V COIN SMD |
| 产品目录绘图： | DC Series Front DC Series Side |
| 标准包装： | 200 |
| 系列： | DC |
| 电容： | 220mF |
| 电压 - 额定： | 2.5V |
| 容差： | -20%，+80% |
| ESR（等效串联电阻）： | 100 欧姆 |
| 寿命@温度： | 70°C 时为 1000 小时 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 币形，细型端子 - 同侧 |
| 引线间隔： | 0.079"（2.00mm） |
| 包装： | 散装 |
| 尺寸/尺寸： | 0.268" 直径（6.80mm） |
| 高度 - 座高（最大）： | 0.102"（2.60mm） |
| 工作温度： | -25°C ~ 70°C |
| 产品目录页面： | 1912 (CN2011-ZH PDF) |
| 其它名称： | 604-1006 |
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ALUMINUM ELECTROLYTIC
CAPACITORS
TECHNICAL NOTE
5 Electrode Foil Development Technology
5-1 Corrosion inhibition of cathode foil
; High reliability capacitors
Inactive treatment is implemented to ensure long life by
inhibiting natural corrosion of the cathode foil. Fig. 3-1
shows its effects with values of the polarization
resistance inversely proportional to the corrosion rate
using the AC impedance method (FRA). This indicates
100
10
1
; Reference
that the cathode foil used in the High reliability capacitors
has the polarization resistance higher than that of the
conventional capacitors owing to corrosion inhibition.
0
1000
Time (h)
Fig. . 3-3
2000
5-4 Long-time stability of electrolyte
( Ω )
5
10
4
10
3
10
The electrolyte used in the High reliability capacitor is sta-
ble with low initial resistivity and small secular
changes at a high temperature. Fig. 3-4 shows
change in resistivity at 105°C.
; High reliability capacitors
2
10
High reliability capacitors
Fig. 3-1
Reference
200
100
; Reference
5-2 Sealing material permeability of electrolyte
0
1000
2000
To ensure long life, a low permeable lactone solvent for
the sealing material is used as the main solvent of the
electrolyte of the High reliability capacitor. Fig. 3-2 shows
the test results on the permeability obtained by chang-
ing the weight of the capacitors produced with different
types of electrolytes at a high temperature.
; High reliability capacitors
; Amidic solvent
Time (h)
Fig. 3-4
5-5 Dielectric formation voltage and leakage current
characteristics of anode foil
To increase the operating life by controlling the gas
generation inside capacitor because of 1.5 to 2 times
the rated voltage, while that of the previous capacitor
is about 1.3 times the rated voltage.
100
10
1
; Lactonic product
100
10
1
0
1000
2000
Time (h)
0.1
1
1.5
2
2.5
Fig. . 3-2
5-3 Airtightness of sealing material
Since the electrolyte is stable for hours, the key element
for capacitor’s life is the sealing material. By optimizing
the crosslinking density of the sealing material polymer,
the sealing material of the High reliability capacitor attains
its long life with electrolyte permeability less than that of
Voltage ratio
Fig. 3-5
5-6 Lowered ESR of Electrode Foil
To reduce the ESR of electrolytic capacitor, we have
improved our chemical conversion technology for
anode foil to develop lower ESR electrode foil compared
to the conventional product as shown in Fig. 3-6
the conventional capacitors.
10
; High reliability capacitors
Fig. 3-3 shows the test results on the airtightness of
the sealing material obtained by changing the weight
of the capacitors at a high temperature, producing
capacitors with the conventional sealing material and
improved one both containing the electrolyte used in
the High reliability capacitor.
NOTE
Design, Speci?cations are subject to change without notice.
Ask factory for technical speci?cations before purchase and/or use.
0.5
0
; Reference
20 50 80 105
Fig. 3-6 ESR Index of Anode Foil
CAT.No.2008/2009E(2008.10.1)
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