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参数资料
| 型号： | L6710 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 2 A SWITCHING CONTROLLER, PQFP44 |
| 封装： | 10 X 10 MM, 1 MM HEIGHT, TQFP-44 |
| 文件页数： | 14/34页 |
| 文件大小： | 1610K |
| 代理商： | L6710 |
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21/34
L6710
Figure 14. Current Sharing Control Loop.
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.
Average Current Mode (ACM) Control Loop
The average current mode control loop is reported in figure 15. The current information IFB sourced by
the FB 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
Removing the dependence from the Error Amplifier gain, so assuming this gain high enough, the control
loop gain results:
With further simplifications, it results:
L1
L2
+
PWM1
1/5
IINFO2
IINFO1
PWM2
COMP
VOUT
CURRENT
SHARING
DUTY CYCLE
CORRECTION
D02IN1393
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
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
--------
Z
P s
()
R
FB
---------------
+
–
=
G
LOOP s
()
4
5
---
V
IN
V
OSC
-------------------
Z
F s
()
R
FB
---------------
Ro
R
DROOP
+
Ro
R
L
2
-------
+
-------------------------------------
1s Co
R
DROOP //Ro
ESR
+
()
+
s
2
Co
L
2
---
s
L
2Ro
---------------
Co E SR
Co
R
L
2
-------
+
+
1
+
+
----------------------------------------------------------------------------------------------------------------------------------
–
=
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|---|---|
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6710TR | 功能描述:功率驱动器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| L6711 | 功能描述:DC/DC 开关控制器 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 |
| L6711_06 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3 Phase controller with dynamic VID and selectable DACs |
| L6711TR | 功能描述:DC/DC 开关控制器 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 |
| L6712 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
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