參數(shù)資料
型號(hào)： HA17431FPA
廠商： Hitachi,Ltd.
英文描述： Regarding the change of names mentioned in the document, such as Hitachi Electric and Hitachi XX, to Renesas Technology Corp.
中文描述： 關(guān)于在諸如日立電器和日立二十，文件提及的瑞薩科技公司名稱變更
文件頁(yè)數(shù)： 20/26頁(yè)
文件大小： 236K
代理商： HA17431FPA
HA17431 Series
Rev.1, Sep. 2002, page 18 of 24
AC characteristic determination:
This refers to the determination of the gain frequency characteristic of
the shunt regulator as an error amplifier. Taking the configuration in figure 2, the error amplifier
characteristic is as shown in figure 3.
When R
5
= 0
f
OSC
Frequency f (Hz)
* f
OSC
: PWM switching frequency
When R
5
≠
0
G
1
f
1
f
AC
f
2
G
2
G
Figure 3 HA17431 Error Amplification Characteristic
In Figure 3, the following formulas are obtained:
Gain
G
1
= G
0
≈
50 dB to 60 dB (determined by shunt regulator)
G
2
=R
5
R
3
Corner frequencies
f
1
= 1/(2
π
C
1
G
0
R
3
)
f
2
= 1/(2
π
C
1
R
5
)
G
0
is the shunt regulator open-loop gain; this is given by the reciprocal of the reference voltage fluctuation
Vref/
V
KA
, and is approximately 50 dB.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HA17431FPA-E 制造商:Renesas Electronics 功能描述:Adjustable Bulk
HA17431FPAJ 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC
HA17431FPJ 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Shunt Regulator
HA17431G 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Adjustable Precision Shunt Regulators
HA17431GPATZ-E 制造商:Renesas Electronics 功能描述:Cut Tape 制造商:Renesas 功能描述:V-Ref Adjustable 100mA 3-Pin TO-92 T/R
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