參數(shù)資料
型號: 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): 18/37頁
文件大?。?/td> 959K
代理商: L5980
Application informations
L5980
18/37
Figure 9.
The Error amplifier, the PWM modulator and the LC output filter
.
The transfer function on the LC filter is given by:
Equation 13
where:
Equation 14
Equation 15
As seen in
Chapter 4.3
two different kind of network can compensate the loop. In the two
following paragraph the guidelines to select the Type II and Type III compensation network
are illustrated.
5.4.1
Type III compensation network
The methodology to stabilize the loop consists of placing two zeros to compensate the effect
of the LC double pole, so increasing phase margin; then to place one pole in the origin to
FB
COMP
V
REF
E/A
PWM
V
S
OUT
V
CC
C
OUT
ESR
L
G
PW0
G
LC
G
LC
s
( )
1
2
π
f
-------------------------
+
1
2
π
Q f
LC
----------------------------
2
π
f
LC
-------------------
2
+
+
------------------------------------------------------------------------
=
f
LC
2
π
L C
OUT
1
R
OUT
--------------
+
-----------------------------------------------------------------------
=
f
zESR
2
π
ESR C
OUT
-------------------------------------------
=
,
Q
R
L C
L
C
OUT
R
OUT
ESR
+
)
---------------------------------------------------------------------+
R
OUT
V
I
OUT
--------------
=
,
=
相關(guān)PDF資料
PDF描述
L5980TR 0.7A step-down switching regulator
L5985 2A step-down switching regulator
L5985TR 2A step-down switching regulator
L5991 PRIMARY CONTROLLER WITH STANDBY
L5991A PRIMARY CONTROLLER WITH STANDBY
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