參數(shù)資料
型號(hào)： L6701TR
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)： 22/44頁(yè)
文件大小： 492K
代理商： L6701TR
10 Output Voltage Positioning
L6701
22/44
=>
The device forces I
DROOP
= I
CS
x3, proportional to the read current, into the feedback resistor
R
FB
implementing the load regulation dependence. The output characteristic vs. load current is
then given by (Offset disabled):
Where R
LL
is the resulting load-line resistance implemented by the system.
The whole power supply can be then represented by a "real" voltage generator with an
equivalent output resistance R
LL
and a voltage value of VID.
R
FB
resistor can be then designed according to the R
LL
specifications as follow:
where R
D
is typically designed to have I
CS
= 35
μ
A at the maximum output current (OCP).
Caution:
Droop function is optional, in case it is not desired, the Current Sense circuit can be modified so
that the device always read a null current (See
Figure 8
). To do this, it is enough to connect
CS+ directly to the output voltage leaving CS- unconnected. The reaction will keep CS+ and
CS- at the same voltage, always reading a null current and also assuring the FB disconnection
protection to be effective.
Figure 8.
Droop Function Current Reading Network
10.2 Fully-Differential Load-Line (Droop Function - Optional)
Fully-Differential current-reading for voltage-positioning allows the designer to save time in the
application fine-tuning since the BOM so obtained becomes layout-independent. The patent-
pending topology offered by L6701 allow implementing fully-differential current-sense still using
only two current-sense pins (CS+ and CS-).
Figure 9
shows the typical Current-Sense Circuit
used to implement the Fully-Differential Droop-Function. The current flowing across the three
inductors is read through an R
PH
- C
PH
filter for each phase as well as an R
D
is required for
each phase to program the trans-conductance-gain. As previously mentioned, a current I
CS
proportional to the average of the currents of the three phases is internally generated, mirrored
L
DCR
-------------
R
C
---------------------------
3
=
I
CS
I
3
------------
DCR
R
D
-------------
=
V
OUT
VID
R
FB
I
DROOP
–
VID
R
FB
DCR
R
D
-------------
I
OUT
–
VID
R
LL
I
OUT
–
=
=
=
R
FB
R
LL
R
DCR
-------------
=
L2
L1
L3
DCR1
DCR2
DCR3
C
PH
R
P
R
P
R
P
R
D
PHASE3
PHASE2
PHASE1
V
OUT
I
CS
CS+
CS-
FB
I
DROOP
x 3
R
F
C
F
R
FB
COMP
L2
L1
L3
DCR1
DCR2
DCR3
PHASE3
PHASE2
PHASE1
V
OUT
I
CS
CS+
CS-
FB
I
DROOP
x 3
R
F
C
F
R
FB
COMP
Droop Function Enabled
Droop Function Disabled
相關(guān)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
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L6710 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(lèi)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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