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參數(shù)資料
| 型號： | LT4351IMS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | MOSFETs |
| 英文描述： | MOSFET Diode-OR Controller |
| 中文描述： | 0.67 A BUF OR INV BASED MOSFET DRIVER, PDSO10 |
| 封裝： | PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 13/20頁 |
| 文件大?。?/td> | 270K |
| 代理商： | LT4351IMS |
LT4351
13
sn4351 4351fs
STATUS
The STATUS pin sinks current when the input (V
IN
) is
above output (OUT) by 15mV and GATE is above V
IN
by
0.7V. This will normally indicate that power is being
passed though the MOSFETs.
In the event of a nonfunctional MOSFET, the GATE voltage
will be driven high (to the GATE clamp voltage). If V
IN
is
greater than OUT by more than 0.21V, the FAULT pin will
sink current to signal the potential problem.
There is no direct measurement or confirmation of current
flowing in the MOSFETs. Current is shared between sources
based on their voltage and series resistance. If precision
load sharing is desired, the LTC4350 may be a more
suitable part.
Redundant Supplies
The LT4351 is an improved solution for ORing redundant
supplies because of its lower forward drop versus conven-
tional diodes. The lower forward drop significantly im-
proves overall efficiency, improves the voltage tolerance
at the load and provides for a more accurate transition
from supply to supply and more accurate load sharing
between supplies.
APPLICATIOU
W
U
U
ORing can be done either at the load or at the source.
Figure 9 shows some examples. ORing at the load is
usually the safest method since it protects against shorts
in interconnects.
The LT4351 tighter forward voltage tolerance makes it
easier to balance current between similar supplies using
the droop method. The droop method uses the supply
voltage and series resistance in the power path to provide
load sharing. In this case, size the MOSFET’s R
DS(ON)
low
to allow for regulation.
ORing Disparate Supplies
The LT4351 provides an easy solution for connecting
together different types of power sources. Again because
of the low forward drop, the efficiency of the system is
improved and the voltage transition between supplies is
more accurate. In addition, the undervoltage and overvolt-
age features of the LT4351 provide options for enabling
and disabling the supplies that are not available from a
common diode. Figure 10 shows some examples of con-
necting disparate supplies.
Figure 9. Redundant Backplane Supplies
Figure 10
LT4351
BOARD
LT4351
LOAD
SOURCE 1
BACKPLANE
SOURCE 2
LT4351
BOARD
LT4351
LOAD
4351 F09
SOURCE 1
BACKPLANE
SOURCE 2
LT4351
Isolated System Supply
from Wall Adapter
Isolated Battery Backup
Three Source ORing Provides Protection
Against Out of Range Supplies
WALL
ADAPTER
SYSTEM
SUPPLY
LOAD
LT4351
BATTERY
WALL
ADAPTER
LOAD
+
LT4351
BATTERY
LT4351
LT4351
WALL
ADAPTER
LOAD
4351 F10
+
SYSTEM
SUPPLY
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LT4351IMS#PBF | 功能描述:IC CTLR MOSFET DIODE-OR 10MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - O 圈控制器 系列:- 標準包裝:1,000 系列:- 應用:電池備份，工業(yè)/汽車，大電流開關 FET 型:- 輸出數(shù):5 內部開關:是 延遲時間 - 開啟:100ns 延遲時間 - 關閉:- 電源電壓:3 V ~ 5.5 V 電流 - 電源:250µA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:16-SOIC N 包裝:帶卷 (TR) |
| LT4351IMS#TR | 功能描述:IC CTRLR MOSFET DIODE-OR 10MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - O 圈控制器 系列:- 標準包裝:1,000 系列:- 應用:電池備份，工業(yè)/汽車，大電流開關 FET 型:- 輸出數(shù):5 內部開關:是 延遲時間 - 開啟:100ns 延遲時間 - 關閉:- 電源電壓:3 V ~ 5.5 V 電流 - 電源:250µA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:16-SOIC N 包裝:帶卷 (TR) |
| LT4351IMS#TRPBF | 功能描述:IC CTRLR MOSFET DIODE-OR 10MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - O 圈控制器 系列:- 標準包裝:1,000 系列:- 應用:電池備份，工業(yè)/汽車，大電流開關 FET 型:- 輸出數(shù):5 內部開關:是 延遲時間 - 開啟:100ns 延遲時間 - 關閉:- 電源電壓:3 V ~ 5.5 V 電流 - 電源:250µA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:16-SOIC N 包裝:帶卷 (TR) |
| LT4352 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Voltage Surge |
| LT4356 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Voltage Surge |
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