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參數(shù)資料
| 型號(hào)： | SVFD1D226M |
| 廠商： | NEC Corp. |
| 英文描述： | Surface mount resin molded chip with Built-in fuse, Low blow-out current 2A |
| 中文描述： | 表面貼裝模壓內(nèi)置保險(xiǎn)絲芯片樹(shù)脂，低擊出電流2A |
| 文件頁(yè)數(shù)： | 12/16頁(yè) |
| 文件大?。?/td> | 142K |
| 代理商： | SVFD1D226M |
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12
SV/F SERIES
DATA SHEET EC0003EJ3V1DS00
2. Built-in-fuse characteristics
The briefing of the built-in-fuse characteristics is that:
(1) Fuse may not work under some environmental conditions.
(2) When the built fuse blows, slight smoking may occur.
(3) Fuse blowout data is as shown on page 10.
(4) The ESR (equivalent series resistance) is larger than the conventional tantalum capacitor by the built-in-
fuse resistance.
Taking notice the above, refer to the following in detail for reliable circuit design.
3. Series resistance
As shown in Figure 1, reliability is increased by inserting a series resistance of at least 3
/V into circuits
where current flow is momentary (switching circuits, charge/discharge circuits, etc).
If the capacitor is in a low-impedance circuit, the voltage applied to the capacitor should be less than 1/2 to
1/3 of the DC rated voltage.
4. Ripple voltage
The sum of DC voltage and peak ripple voltage should not exceed the rated DC rated voltage of the capacitor.
0.1
1
Frequency (kHz)
Figure 2 Permissible ripple voltage vs. frequency
10
0.1
1
10
R
100
100
35 V
25 V
20 V
16 V
10 V
Case : B2, @ 25
C
0.1
1
Frequency (kHz)
10
0.1
1
10
R
100
100
50 V
35 V
25 V
Case : C, D2,D
@ 25
C
10 V
Figure 2 is based on an ambient temperature of 25
C. For higher temperature, permissible ripple voltage shall
be derated as follows.
Permissible voltage at 50
C = 0.7
×
permissible voltage at 25
C
Permissible voltage at 85
C = 0.5
×
permissible voltage at 25
C
Permissible voltage at 125
C = 0.3
×
permissible voltage at 25
C
10
1
M
0.1
0.1
1
Series Resistance (
/V)
Figure 1 Effects of series resistance
10
100
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