參數(shù)資料
型號(hào)： L5980
廠商： 意法半導(dǎo)體
英文描述： 0.7A step-down switching regulator
中文描述： 0.7A的降壓開關(guān)穩(wěn)壓器
文件頁數(shù)： 20/37頁
文件大?。?/td> 959K
代理商： L5980
Application informations
L5980
20/37
Figure 11.
Open loop gain: module Bode diagram
The guidelines for positioning the poles and the zeroes and for calculating the component
values can be summarized as follow:
1.
Choose a value for R
1
, usually between 1k
and 5k
.
2.
Choose a gain (R
4
/R
1
) in order to have the required bandwidth (BW), that means:
Equation 18
where K is the feed forward constant and 1/K is equals to 9.
3.
Calculate C
4
by placing the zero at 50% of the output filter double pole frequency (f
LC
):
Equation 19
4.
Calculate C
5
by placing the second pole at four times the system bandwidth (BW):
Equation 20
5.
Set also the first pole at four times the system bandwidth and also the second zero at
the output filter double pole:
R
4
f
LC
---------
1
K
---
R
1
=
C
4
π
R
4
f
LC
---------------------------
=
C
5
C
2
R
4
C
4
4 BW
1
–
-------------------------------------------------------------
=
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L5980_08 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:0.7 A step-down switching regulator
L5980TR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 700mA Step-Down Switching Reg RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
L5980TR-CUT TAPE 制造商:ST 功能描述:L5980 Series 15 V 250 kHz 0.7 A Step Down Switching Regulator - VFQFPN-8
L5981 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1A STEP-DOWN SWITCH REG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
L5981_08 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1 A step-down switching regulator
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