- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384586 > L6740LTR (意法半導(dǎo)體) Hybrid controller (4+1) for AMD SVID and PVID processors PDF資料下載
參數(shù)資料
| 型號： | L6740LTR |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Hybrid controller (4+1) for AMD SVID and PVID processors |
| 中文描述： | 混合控制器（4 1對AMD SVID和PVID）處理器 |
| 文件頁數(shù)： | 27/44頁 |
| 文件大?。?/td> | 657K |
| 代理商： | L6740LTR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁當(dāng)前第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁
L6740L
Output voltage positioning
27/44
6.6
NB section - Load-line and load-indicator (Optional)
This method introduces a dependence of the output voltage on the load current recovering
part of the drop due to the output capacitor ESR in the load transient. Introducing a depen-
dence of the output voltage on the load current, a static error, proportional to the output cur-
rent, causes the output voltage to vary according to the sensed current.
Figure 10
shows the Current Sense Circuit used to implement the Load-Line. The current
flowing across the Low-Side MOSFET is read through R
ISEN
. R
ISEN
programs a transcon-
ductance gain and generates a current I
ISEN
proportional to the current delivered by the NB
Section that is then sourced by the NB_FB pin (I
DROOP_NB
). R
FB_NB
gives the final gain to
program the desired load-line slope (
Figure 9
).
The output characteristic vs. load current is then given by (Offset disabled):
Where R
LL_NB
is the resulting Load-Line resistance implemented by the NB Section.
The whole power supply can be then represented by a “real” voltage generator with an
equivalent output resistance R
LL_NB
and a voltage value of VID.
R
FB_NB
resistor can be then designed according to the R
LL_NB
specifications as follow:
Caution:
Load-Line (DROOP) implementation is optional, in case it is not desired, the resulting cur-
rent information may be employed for other purposes, such as Load Indicator (LI). In this
case, simply connect a resistor R
LI_NB
to SGND: the resulting voltage drop across R
LI_NB
will be proportional to the delivered current according to the following relationship:
R
R
ISEN
Note:
Split between R
FB_COMP_NB
and R
FB_DROOP_NB
(
Figure 9
) is useful in custom designs
where the Droop effect is minimum (i.e. <50mV over 100A) to simplify the compensation
network design.
6.7
NB section - Offset (Optional)
The NB_OS pin allows programming a positive offset (V
OS_NB
) for the NB Section output
voltage by connecting a resistor R
OS_NB
to SGND. The pin is internally fixed at 1.240V so a
current is programmed by connecting the resistor R
OS_NB
between the pin and SGND: this
current is mirrored and then properly sunk from the NB_FB pin as shown in
Figure 9
. Output
voltage is then programmed as follow:
Offset resistor can be designed by considering the following relationship (R
FB_NB
may be
fixed by the Droop effect):
V
OUT_NB
VID
R
FB_NB
I
DROOP_NB
–
VID
R
FB_NB
R
R
ISEN
----------------
I
OUT
–
VID
R
LL_NB
I
OUT_NB
–
=
=
=
R
FB_NB
R
LL_NB
R
R
dsON
-----------------
=
V
NB_DROOP
R
LI_NB
----------------
I
OUT_NB
=
V
NB
VID
R
FB_NB
I
DROOP_NB
I
OS_NB
–
(
)
–
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6741 | High current MOSFET driver |
| L6741TR | High current MOSFET driver |
| L6743 | High current MOSFET driver |
| L6743Q | High current MOSFET driver |
| L6919E | 5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6741 | 功能描述:功率驅(qū)動器IC SnglPphase Dual MOSFET Driver 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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| L6741TR | 功能描述:功率驅(qū)動器IC SnglPphase Dual MOSFET Driver 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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| L6743 | 功能描述:功率驅(qū)動器IC SnglPphase Dual MOSFET Driver 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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| L6743_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:High current MOSFET driver |
| L6743B | 功能描述:功率驅(qū)動器IC Hi-current MOSFET Driver 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(fēng)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(fù)。