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參數資料
| 型號： | L6712QTR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2 A SWITCHING CONTROLLER, QCC36 |
| 封裝： | 6 X 6 MM, 1 MM HEIGHT, VFQFPN-36 |
| 文件頁數： | 14/29頁 |
| 文件大小： | 624K |
| 代理商： | L6712QTR |
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L6712A L6712
Where
IREAD is the difference between one phase current and the ideal current (IMAX/2).
For RSENSE = 4m and IMAX = 40A the current sharing error is equal to 2.5%, neglecting errors due to Rg
and RSENSE mismatches.
3.12.2Average Current Mode (ACM) Control Loop (DROOP=FB)
The average current mode control loop is reported in Figure 18. The current information IDROOP sourced by
the DROOP pin flows into RFB implementing the dependence of the output voltage from the read current.
The ACM control loop gain results (obtained opening the loop after the COMP pin):
Where:
■
is the equivalent output resistance determined by the droop function;
■ 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 two inductor impedance;
■ A(s) is the error amplifier gain;
■
is the ACM PWM transfer function where
VOSC is the oscillator ramp amplitude
and has a typical value of 3V
■ RA_Gain is the Remote Amplifier Gain.
Removing the dependence from the Error Amplifier gain, so assuming this gain high enough, the control
loop gain results:
Considering now that in the application of interest it can be assumed that Ro>>RL; ESR<<Ro and
RDROOP<<Ro, it results:
G
LOOP s
()
PWM Z
F s
() R
DROOP
RA_Gain Z
P s
()
+
()
Z
P s
() Z
L s
()
+
()
Z
F s
()
As
()
---------------
1
As
()
------------
+
R
FB
+
------------------------------------------------------------------------------------------------------------------------
–
=
R
DROOP
Rsense
Rg
---------------------- R
FB
=
PWM
4
5
---
V
IN
V
OSC
-------------------
=
G
LOOP s
()
4
5
---
V
IN
V
OSC
-------------------
Z
F s
()
Z
P s
() Z
L s
()
+
------------------------------------
Rs
Rg
--------
RA_Gain Z
P s
()
R
FB
---------------------------------------------
+
–
=
G
LOOP s
()
4
5
---
V
IN
V
OSC
-------------------
Z
F s
()
R
FB
---------------
1s Co
R
DROOP
RA_Gain
-------------------------
ESR
+
+
s
2
Co
L
2
---
s
L
2Ro
---------------
Co ESR
Co
L
2Ro
---------------
+
+
1
+
+
------------------------------------------------------------------------------------------------------------------------------------------- RA_Gain
–
=
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相關代理商/技術參數 |
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| L6712大電流DCDC轉換器 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| L6713A | 功能描述:DC/DC 開關控制器 2/3 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 |
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| L6713ATR | 功能描述:DC/DC 開關控制器 2/3 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 |
| L6714 | 功能描述:功率驅動器IC 4 Phase Controller RoHS:否 制造商:Micrel 產品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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