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參數(shù)資料
| 型號(hào)： | MB3817 |
| 廠商： | Fujitsu Limited |
| 英文描述： | ECONOLINE: REC5-S_DRW(Z)/H4,H6 - Safety standards and approval: EN 60950 certified, rated for 250VAV (LVD test report)- Applied for Ul 1950 Component Recognised Certification- 5W DIP Package- 4kVDC & 6kVDC Isolation- Regulated Output- Continuous Short Circiut Protection Auto-Restarting |
| 中文描述： | 開關(guān)穩(wěn)壓器控制器 |
| 文件頁數(shù)： | 21/29頁 |
| 文件大?。?/td> | 240K |
| 代理商： | MB3817 |
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MB3817
I
EQUIVALENT SERIES RESISTOR AND STABILITY OF SMOOTHING CAPACITOR
The equivalent series resistance (ESR) of a smoothing capacitor in a DC/DC converter greatly affects the phase
characteristics of the loop depending on its value.
System stability is improved by ESR because it causes the phase to lead that of the ideal capacitor in high-
frequency regions. (See Figures 2 and 3) Conversely, if a low-ESR smoothing capacitor is used, system stability
deteriorates. Therefore, use of a low-ESR semiconductor electrolytic capacitors (ex. OS–CON) or tantalum
capacitors calls for careful attention.
V
IN
D
L
R
C
R
L
C
Tr
10
100
1 k
10 k
100 k
180
90
0
(1) : R
C
=
0
(2) : R
C
=
31 m
(2)
(1)
P
φ
Frequency f (Hz)
10
100
1 k
10 k
100 k
60
40
20
0
20
(1) : R
C
=
0
(2) : R
C
=
31 m
(1)
(2)
G
Frequency f (Hz)
Figure 1 Basic circuit of stepdown DC/DC converter
Figure 2 Gain-Frequency characteristic
Figure 3 Phase-Frequency characteristic
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB3821 | 2-ch DC/DC Converter IC With Synchronous Rectifier |
| MB3821PFV | 2-ch DC/DC Converter IC With Synchronous Rectifier |
| MB3825A | 6-ch DC/DC Converter IC With Synchronous Rectifier |
| MB3825 | 6-ch DC/DC Converter IC With Synchronous Rectifier |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB3817_03 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Switching Regulator Controller |
| MB3817PFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Switching Regulator Controller |
| MB3817PFV-G-BND(E1) | 制造商:Fujitsu 功能描述: |
| MB3821 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:2-ch DC/DC Converter IC With Synchronous Rectifier |
| MB3821PFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:2-ch DC/DC Converter IC With Synchronous Rectifier |
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