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參數資料
| 型號： | L6711 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2 A SWITCHING CONTROLLER, 178 kHz SWITCHING FREQ-MAX, PQFP48 |
| 封裝： | 7 X 7 MM, 1 MM HEIGHT, TQFP-48 |
| 文件頁數： | 36/50頁 |
| 文件大?。?/td> | 679K |
| 代理商： | L6711 |
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L6711
System control loop compensation
41/50
17
System control loop compensation
The control loop is composed by the Current Sharing control loop and the Average Current
Mode control loop. Each loop gives, with a proper gain, the correction to the PWM in order
to minimize the error in its regulation: the Current Sharing control loop equalize the currents
in the inductors while the Average Current Mode control loop fixes the output voltage equal
to the reference programmed by VID. Figure 21 shows the block diagram of the system
control loop.
Figure 21.
Main control loop diagram
The average current mode control loop is reported in Figure 22. The current information IFB
sourced by the FB pin flows into RFB implementing the dependence of the output voltage
from the read current.
The system can be modeled with an equivalent single phase converter which only
difference is the equivalent inductor L/3 (where each phase has an L inductor).The ACM
control loop gain results (obtained opening the loop after the COMP pin):
Where:
●
RSENSE is the mosfet RdsON or the Inductor DCR depending on the sensing element
selected;
●
is the equivalent output resistance determined by droop;
●
ZP(s) is the impedance resulting by the parallel of the output capacitor (and its ESR)
and the applied load Ro;
●
ZF(s) is the compensation network impedance;
●
ZL(s) is the parallel of the three inductor impedance;
●
A(s) is the error amplifier gain;
C
O
M
P
V
ID
FB
R
F
B
4/5
ZF(s)
E
R
O
RA
M
PLIFIER
P
W
M
3
P
W
M
1
000000000000000000
C
U
R
E
N
T
SH
AR
IN
G
D
U
T
YC
Y
C
LE
C
O
R
E
C
TIO
N
C
o
R
o
L3
L1
P
W
M
2
L2
1/5
IINFO1
IINFO2
IINFO3
IFB
G
L OOP s
()
PWM Z
F s
() R
D ROOP
Z
P s
()
+
()
Z
P s
() Z
L s
()
+
()
Z
F s
()
As
()
--------------
1
As
()
------------
+
R
FB
+
-------------------------------------------------------------------------------------------------------------------
–
=
R
D ROOP
R
SEN SE
Rg
--------------------- RFB
=
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相關代理商/技術參數 |
參數描述 |
|---|---|
| L6711_06 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3 Phase controller with dynamic VID and selectable DACs |
| L6711TR | 功能描述:DC/DC 開關控制器 3 PHASE CONTROLLER RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| L6712 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
| L6712_05 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
| L6712A | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
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