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參數(shù)資料
| 型號： | MB3785 |
| 廠商： | Fujitsu Limited |
| 英文描述： | Switching Regulator Controller (4 Channels plus High-Precision, High-Frequency Capabilities) |
| 中文描述： | 開關穩(wěn)壓器控制器（4通道加高精度，高頻率功能） |
| 文件頁數(shù)： | 24/29頁 |
| 文件大小： | 293K |
| 代理商： | MB3785 |
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MB3785A
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 17 and 19.) Conversely, if a low-ESR smoothing capacitor is used, system stability deterio-
rates. Therefore, use of a low-ESR semiconductor electrolytic capacitors (OS – CON) or tantalum capacitors calls
for careful attention.
Figure 17. Basic Circuit of Stepdown DC/DC Converter
Figure 18. Gain-Frequency Characteristic
Figure 19. Phase-Frequency Characteristic
Tr
L
C
V
IN
R
C
R
L
D
20
0
–20
–40
–60
10
100
1 k
10 k
100 k
G
Frequency f (Hz)
(2)
(1) : R
C
= 0
(2) : R
C
= 31 m
(1)
0
–90
–180
10
100
1 k
10 k
100 k
P
Frequency f (Hz)
(1) : R
C
= 0
(2) : R
C
= 31 m
(2)
(1)
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MB3785A | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Switching Regulator Controller (4 Channels plus High-Precision, High-Frequency Capabilities) |
| MB3785A_03 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Switching Regulator Controller (4 Channels plus High-Precision, High-Frequency Capabilities) |
| MB3785APFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Switching Regulator Controller (4 Channels plus High-Precision, High-Frequency Capabilities) |
| MB3785APFV-G-BND(E1) | 制造商:Fujitsu 功能描述: |
| MB3788 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:SWITCHING REGULATOR CONTROLLER |
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