參數(shù)資料
型號(hào)： L6722
廠商： STMICROELECTRONICS
元件分類(lèi)： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, QCC36
封裝： 6 X 6 MM, 1 MM PITCH, VFQFPN-36
文件頁(yè)數(shù)： 20/34頁(yè)
文件大?。?/td> 421K
代理商： L6722
Obsolete
Product(s)
- Obsolete
Product(s)
L6722
11 System control loop compensation
27/34
11
System control loop compensation
The control loop is composed by the Current Sharing control loop (See Figure 16) and the
Voltage 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 Voltage control loop fixes the output voltage equal to the reference.
Figure 16 shows the block diagram of the system control loop.
The system Control Loop is reported in Figure 17. The current information IDROOP sourced by
the DROOP pin flows into RFB implementing the dependence of the output voltage from the
read current (when DROOP is enabled).
Figure 16. Main control loop
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 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 three inductor impedance;
●
A(s) is the error amplifier gain;
L3
L2
L1
PWM3
PWM2
PWM1
4 / 5
Reference
ERROR AMPLIFIER
COMP
FB
ZF(s)
IDROOP
COUT
ROUT
1 / 5
CURRENT SHARING
DUTY CYCLE
CORRECTION
IINFO1
IINFO3
IINFO2
G
LOOP s
()
PWM
Z
F s
()
R
DROOP
Z
P s
()
+
()
Z
P s
() Z
L s
()
+
[]
Z
F s
()
As
()
---------------
1
As
()
------------
+
R
FB
+
-------------------------------------------------------------------------------------------------------------------------
–
=
R
DROOP
DCR
Rg
-------------
R
FB
=
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6722TR 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 3 Phase Controller 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(kāi)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
L6725 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Vltg Mode PWM Controller 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(kāi)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
L6725_07 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Voltage mode PWM controller with bootstrap anti-discharging system
L6725A 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Vltg Mode PWM Controller 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(kāi)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
L6725ATR 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Step-Down Controller 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(kāi)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
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