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参数资料
| 型号： | L6712DTR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 2 A SWITCHING CONTROLLER, PDSO28 |
| 封装： | SO-28 |
| 文件页数： | 14/29页 |
| 文件大小： | 624K |
| 代理商： | L6712DTR |
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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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|---|---|
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| L6712QTR | 2 A SWITCHING CONTROLLER, QCC36 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6712Q | 功能描述:开关变换器、稳压器与控制器 2-Ph Interleaved RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| L6712QTR | 功能描述:开关变换器、稳压器与控制器 2-Ph Interleaved RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| L6712大电流DCDC转换器 | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
| L6713A | 功能描述:DC/DC 开关控制器 2/3 Phase controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6713A_0805 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:2/3/4 phase controller with embedded drivers for Intel VR11.1 |
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