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LT1640L_1

更新时间： 2024-02-13 00:42:43
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
16页 189K
描述
Negative Voltage Hot Swap Controller

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中文翻译

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LT1640L_1 数据手册

 浏览型号LT1640L_1的Datasheet PDF文件第2页浏览型号LT1640L_1的Datasheet PDF文件第3页浏览型号LT1640L_1的Datasheet PDF文件第4页浏览型号LT1640L_1的Datasheet PDF文件第5页浏览型号LT1640L_1的Datasheet PDF文件第6页浏览型号LT1640L_1的Datasheet PDF文件第7页 
LT1640L/LT1640H  
Negative Voltage  
Hot Swap Controller  
U
DESCRIPTIO  
FEATURES  
The LT®1640L/LT1640H is an 8-pin, negative voltage Hot  
SwapTM controller that allows a board to be safely inserted  
and removed from a live backplane. Inrush current is  
limited to a programmable value by controlling the gate  
voltage of an external N-channel pass transistor. The pass  
transistor is turned off if the input voltage is less than the  
programmable undervoltage threshold or greater than the  
overvoltage threshold. A programmable electronic circuit  
breaker protects the system against shorts. The PWRGD  
(LT1640L) or PWRGD (LT1640H) signal can be used to  
directly enable a power module. The LT1640L is designed  
for modules with a low enable input and the LT1640H for  
modules with a high enable input.  
■
Allows Safe Board Insertion and Removal  
from a Live –48V Backplane  
■
Operates from –10V to –80V  
■
Programmable Inrush Current  
■
Programmable Electronic Circuit Breaker  
■
Programmable Overvoltage Protection  
■
Programmable Undervoltage Lockout  
■
Power Good Control Output  
U
APPLICATIO S  
■
Central Office Switching  
■
–48V Distributed Power Systems  
■
Negative Power Supply Control  
The LT1640L/LT1640H is available in 8-pin PDIP and SO  
packages.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Hot Swap is a trademark of Linear Technology Corporation.  
U
TYPICAL APPLICATIO  
(SHORT PIN)  
GND  
GND  
Input Inrush Current  
R4†  
8
562k  
V
DD  
1%  
3
2
INRUSH  
CURRENT  
1A/DIV  
UV  
OV  
R5†  
9.09k  
1%  
1
LT1640L  
PWRGD  
UV = 37V  
R6†  
10k  
1%  
V
SENSE  
5
GATE  
6
DRAIN  
7
EE  
GATE – VEE  
10V/DIV  
4
OV = 71V  
*
1N4148  
C1†  
150nF  
25V  
R3†  
18k  
5%  
R2  
10Ω  
5%  
C2†  
3.3nF  
100V  
R1†  
0.02Ω  
5%  
DRAIN  
50V/DIV  
3
4
–48V  
VEE  
50V/DIV  
2
1
2
Q1  
IRF530  
ON/OFF  
1
9
8
+
–
+
+
5V  
V
V
V
IN  
OUT  
SENSE  
CONTACT  
BOUNCE  
* DIODES INC. SMAT70A  
C3  
0.1µF  
100V  
+
C4  
+
C5  
† THESE COMPONENTS ARE APPLICATION  
SPECIFIC AND MUST BE SELECTED BASED  
UPON OPERATING CONDITIONS AND DESIRED  
PERFORMANCE. SEE APPLICATIONS  
INFORMATION.  
7
6
5
100µF  
TRIM  
–
100µF  
16V  
1640 F06b  
100V  
5ms/DIV  
SENSE  
4
–
V
IN  
OUT  
1640 TA01  
LUCENT  
JW050A1-E  
1640lhfb  
1
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