參數(shù)資料
型號： L6712D
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 2 A SWITCHING CONTROLLER, PDSO28
封裝： SO-28
文件頁數(shù)： 14/29頁
文件大?。?/td> 624K
代理商： L6712D
21/29
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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L6712QTR 2 A SWITCHING CONTROLLER, QCC36
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6712DTR 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2-Ph Interleaved RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
L6712Q 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2-Ph Interleaved RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
L6712QTR 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2-Ph Interleaved RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
L6712大電流DCDC轉(zhuǎn)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(guān)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(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
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