參數(shù)資料
型號(hào)： MB3789
廠商： Fujitsu Limited
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述： 抗輻射高效，5安培開關(guān)穩(wěn)壓器
文件頁(yè)數(shù)： 22/28頁(yè)
文件大?。?/td> 214K
代理商： MB3789
22
MB3789
I
EQUIVALENT SERIES RESISTANCE OF SMOOTHING CAPACITOR AND SYSTEM
STABILITY
The equivalent series resistance (ESR) value of a smoothing capacitor for the DC/DC converter largely affects
the loop phase characteristic.
Depending on the ESR value, the phase characteristic causes the ideal capacitor in a high-frequency domain
advance the loop phase (as shown in Figures 16 and 17) and thus the system is improved in stability. In contrast,
using a smoothing capacitor with low ESR lowers system stability. Use meticulous care when a semiconductor
electrolytic capacitor with low ESR (such as an OS capacitor) or a tantalum capacitor is used. (The next page
gives an example of reduction in phase margin when an OS capacitor is used.)
R
C
V
IN
D
RL
C
Tr
L
20
0
20
40
60
10
(1) : R
C
= 0
(2) : R
C
= 31 m
100
1 k
10 k
100 k
G
Frequency f (Hz)
(1)
(2)
0
90
180
10
100
1 k
10 k
100 k
(1) : R
C
= 0
(2) : R
C
= 31 m
P
Frequency f (Hz)
(1)
(2)
Figure 15 Basic circuit of step-down DC/DC converter
Figure 16 Gain vs. frequency
Figure 17 Phase vs. frequency
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MB3789PFV 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Switching Regulator Controller (Supporting External Synchronization)
MB3789PFV-G-BND(E1) 制造商:Fujitsu 功能描述:
MB-379 制造商:Maxxtro 功能描述:
MB3790 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Battery Backup IC
MB3790PF 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Battery Backup IC
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