參數(shù)資料
型號： L6701TR
廠商： 意法半導體
英文描述： 3 Phase Controller for VR10, VR9 and K8 CPUs
中文描述： 3 VR10，VR9和K8處理器相控制器
文件頁數(shù)： 36/44頁
文件大小： 492K
代理商： L6701TR
15 System Control Loop Compensation
L6701
36/44
●
is the PWM transfer function where
V
OSC
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,
and with further simplifications, the control loop gain results:
The system Control Loop gain (See
Figure 18
) is designed in order to obtain a high DC gain to
minimize static error and to cross the 0dB axes with a constant -20dB/dec slope with the
desired crossover frequency
ω
T
. Neglecting the effect of Z
F
(s), the transfer function has one
zero and two poles; both the poles are fixed once the output filter is designed (LC filter
resonance
ω
LC
) and the zero (
ω
ESR
) is fixed by ESR and the Droop resistance.
Figure 18. Equivalent Control Loop Block Diagram (left) and Bode Diagram (right).
To obtain the desired shape an R
F
- C
F
series network is considered for the Z
F
(s)
implementation. A zero at
ω
F
= 1/R
F
C
F
is then introduced together with an integrator. This
integrator minimizes the static error while placing the zero
ω
F
in correspondence with the L-C
resonance assures a simple -20dB/dec shape of the gain.
In fact, considering the usual value for the output filter, the LC resonance results to be at
frequency lower than the above reported zero.
Compensation network can be simply designed placing
ω
F
=
ω
LC
and imposing the cross-over
frequency
ω
T
as desired obtaining (always considering that
ω
T
might be not higher than 1/10th
of the switching frequency F
SW
):
R
V
V
IN
3
R
DROOP
PWM
4
5
--
V
OSC
------------------
=
GLOOPs
( )
4
5
--
---------------------
( )
---------------
-------------------------------------------
+
RO
-------
+
1
ESR
+
(
)
+
s2
CO
L
3
----
s
RO
------------------
CO
ESR
CO
-------
+
+
1
+
+
------------------------------------------------------------------------------------------------------------------------------------------
–
=
Reference
FB
COMP
VSEN
FBR
FBG
64k
64k
64k
R
F
C
F
R
FB
DROOP
PWM
L / N
ESR
C
O
R
O
d V
OUT
V
OUT
V
OUT
Z
F
(s)
Z
FB
(s)
REMOTE BUFFER
I
D
dB
ω
Z
F
(s)
G
LOOP
(s)
K
ω
LC
=
ω
F
ω
ESR
ω
T
R
F
[dB]
R
F
----------------------------------
5
4
--
ω
T
ESR
+
(
)
-------------------------------------------------------
=
C
F
C
O
R
F
L
3
--
-------------------
=
相關PDF資料
PDF描述
L6711 3 PHASE CONTROLLER WITH DYNAMIC VID AND SELECTABLE DACs
L6711TR 3 PHASE CONTROLLER WITH DYNAMIC VID AND SELECTABLE DACs
L6714 4 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6Bit CPUs
L6714TR 4 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6Bit CPUs
L6726A Single phase PWM controller
相關代理商/技術參數(shù)
參數(shù)描述
L6706 制造商:STMicroelectronics 功能描述:DC DC Cntrlr Single-OUT Step Down 40-Pin VFQFPN EP Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:8-Bit VR11.1 Single CTRL w/int Driver
L6706TR 功能描述:DC/DC 開關控制器 VR11.1 SINGLE PHASE CNTRL W/INT DRI 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(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
L6709 功能描述:功率驅(qū)動器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 產(chǎn)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
L6709TR 功能描述:功率驅(qū)動器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 產(chǎn)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
L6710 功能描述:功率驅(qū)動器IC 6-Bit Dual Ph Contlr RoHS:否 制造商:Micrel 產(chǎn)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
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*