參數(shù)資料
型號(hào)： L6701
廠商： 意法半導(dǎo)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(yè)數(shù)： 21/44頁(yè)
文件大?。?/td> 492K
代理商： L6701
L6701
10 Output Voltage Positioning
21/44
10
Output Voltage Positioning
Output voltage positioning is performed by selecting the reference DAC and by programming
the Droop Function and Offset to the reference (See
Figure 7
). The current (I
DROOP
) sourced
from the FB pin, directly proportional to the read current, causes the output voltage to vary
according to the external R
FB
resistor so implementing the desired load-line resistance. The
current (I
OS
) sourced from the REF_IN pin causes the reference voltage to be offset according
to the resistance R
FB
connected.
The output voltage is then driven by the following relationship:
Both DROOP and OFFSET function can be disabled: see
Section 10.1
and
Section 10.3
for
details.
Figure 7.
Voltage Positioning
10.1 Load-Line (Droop Function - Optional)
This method "recovers" part of the drop due to the output capacitor ESR in the load transient,
introducing a dependence of the output voltage on the load current: a static error proportional to
the output current causes the output voltage to vary according to the sensed current.
Figure 8
shows the typical Current-Sense Circuit used to implement the Droop-Function in low-
cost application (saves component count). The current flowing across the three inductors is
read through the R
PH
- C
PH
filter across CS+ and CS- pins. R
D
programs a trans-conductance
gain and generates a current I
CS
proportional to the average of the currents of the three
phases. The current I
CS
is then mirrored and, multiplied by three, sourced by the FB pin
(I
DROOP
). R
FB
gives the final gain to program the desired load-line slope.
Considering the scheme reported on
Figure 8
, it is possible to observe that:
I
3
1
s R
+
Time constant matching between the inductor (L / DCR) and the current reading filter
(
) is required to implement a real equivalent output impedance of the system so
avoiding over and/or under shoot of the output voltage as a consequence of a load transient. It
results:
V
OUT
VID
R
OS
I
OS
R
FB
I
DROOP
–
+
=
I
D
VID
FB
COMP
VSEN
64k
FBR
FBG
6
64k
6
R
F
C
F
R
FB
(Remote Sense)
REF_IN
REF_OUT
I
O
R
OS
C
OS
I
CS
------------
PH
C
PH
3
----------+
R
D
-------------
=
R
PH
C
PH
3
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6701TR 功能描述:DC/DC 開(kāi)關(guān)控制器 3 Phase Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)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
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(kāi)關(guān)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(kāi)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
L6709 功能描述:功率驅(qū)動(dòng)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(shí)間: 下降時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
L6709TR 功能描述:功率驅(qū)動(dòng)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(shí)間: 下降時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
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