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參數資料
| 型號： | MB3782P |
| 廠商： | FUJITSU LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 0.075 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁數： | 23/28頁 |
| 文件大小： | 248K |
| 代理商： | MB3782P |
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MB3782
I
APPLICATIONS
3. Concerning Equivalent Series Resistance and Stability of Smoothing Capacitors
In DC/DC converters, the equivalent series resistance value (ESR) of smoothing capacitors has a major influence
on loop phase characteristics.
The ESR is a means by which phase characteristics approximate phase relationships to ideal capacitors in high-
frequency bands (see Graph 1-1), thus improving system stability. At the same time, the use of smoothing
capacitors with low ESR reduces system stability, so that care must be taken when using semiconductor
electrolytic capacitors (OS capacitors) or tantalum capacitors with low ESR.
Tr
L
D
Rc
R
L
C
V
IN
Figure 1 Basic circuit for step-down voltage DC/DC converter
1
2
2
10
100
1 k
10 k
100 k
– 60
– 40
– 20
0
20
G
Frequency vs.Gain
P
Frequency f (Hz)
Frequency vs.phase
Frequency f (Hz)
10
100
1 k
10 k
100 k
0
– 90
– 180
2
1
1 : Rc = 0
: Rc = 31 m
2
1 : Rc = 0
: Rc = 31 m
Graph 1 Frequency vs. gain and phase
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相關代理商/技術參數 |
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| MB3782PF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Switching Regulator Controller |
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| MB3785 | 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 | 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) |
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