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LT1641

更新时间： 2024-09-24 22:51:47
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
12页 190K
描述
Positive High Voltage Hot Swap Controller

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中文翻译

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LT1641 数据手册

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Final Electrical Specifications  
LT1641  
Positive High Voltage  
Hot Swap Controller  
August 1999  
U
DESCRIPTIO  
FEATURES  
The LT®1641 is an 8-pin Hot SwapTM controller that allows  
a board to be safely inserted and removed from a live  
backplane. Using an external N-channel pass transistor,  
the board supply voltage can be ramped up at a program-  
mablerate.AhighsideswitchdrivercontrolsanN-channel  
gate for supply voltages ranging from 9V to 80V.  
■
Allows Safe Board Insertion and Removal from a  
Live Backplane  
■
Controls Supply Voltage from 9V to 80V  
■
Programmable Analog Foldback Current Limiting  
■
High Side Drive for an External N-Channel  
■
Automatic Retry or Latched Operation Mode  
■
User Programmable Supply Voltage Power-Up Rate  
The chip features a programmable analog foldback cur-  
rent limit circuit. If the chip remains in current limit for  
more than a programmable time, the N-channel pass  
transistor latches off and is optionally set to automatically  
restart after a time-out delay.  
■
Undervoltage Lockout  
Overvoltage Protection  
■
U
APPLICATIO S  
■
Hot Board Insertion  
The PWRGD output indicates when the output voltage,  
sensed by the FB pin, is within tolerance. The ON pin  
provides programmable undervoltage lockout.  
■
Electronic Circuit Breaker  
■
Industrial High Side Switch/Circuit Breaker  
24V/48V Industrial/Alarm Systems  
■
The LT1641 is available in the 8-lead SO package.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Hot Swap is a trademark of Linear Technology Corporation.  
U
TYPICAL APPLICATIO  
24V Input Voltage Application  
R
Q1  
IRF530  
S
0.01Ω  
V
IN  
V
OUT  
24V  
D1  
CMPZ  
5248B  
C
L
R1  
49.9k  
1%  
R5  
R3  
59k  
1%  
10Ω  
5%  
C1  
10nF  
R6,  
1k, 5%  
R7  
24k  
5%  
8
7
6
V
SENSE GATE  
CC  
1
2
ON  
FB  
R4  
3.57k  
1%  
LT1641  
R2  
3.4k  
1%  
3
PWRGD  
PWRGD  
TIMER  
5
GND  
4
C2  
0.68µF  
1641 TA01  
GND  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-  
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.  
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