参数资料
型号: LT1640LCS8#TR
厂商: Linear Technology
文件页数: 1/16页
文件大小: 192K
描述: IC CTRLR HOTSWAP NEG VOLT 8SOIC
标准包装: 2,500
类型: 热交换控制器
应用: 通用
内部开关:
电源电压: -10 V ~ -80 V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 带卷 (TR)
1
LT1640L/LT1640H
1640lhfb
Negative Voltage
Hot Swap Controller
s
Allows Safe Board Insertion and Removal
from a Live 48V Backplane
s
Operates from 10V to 80V
s
Programmable Inrush Current
s
Programmable Electronic Circuit Breaker
s
Programmable Overvoltage Protection
s
Programmable Undervoltage Lockout
s
Power Good Control Output
The LT
?/DIV>
1640L/LT1640H is an 8-pin, negative voltage Hot
Swap
TM
 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.
The LT1640L/LT1640H is available in 8-pin PDIP and SO
packages.
s
Central Office Switching
s
48V Distributed Power Systems
s
Negative Power Supply Control
Hot Swap is a trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Input Inrush Current
1640 F06b
V
EE
V
DD
LT1640L
SENSE
C1
 
150nF
25V
C2
 
3.3nF
100V
C3
0.1礔
100V
C4
100礔
100V
Q1
IRF530
R2
10&
5%
R3
 
18k
5%
1N4148
R4
 
562k
1%
R5
 
9.09k
1%
R6
 
10k
1%
R1
 
0.02&
5%
4
OV
GND
GND
(SHORT PIN)
3
2
48V
OV = 71V
*
* DIODES INC. SMAT70A
 
 THESE COMPONENTS ARE APPLICATION
SPECIFIC AND MUST BE SELECTED BASED
UPON OPERATING CONDITIONS AND DESIRED
PERFORMANCE. SEE APPLICATIONS
INFORMATION.
UV = 37V
UV
5
6
8
7
1
GATE
DRAIN
PWRGD
1640 TA01
V
OUT
+
SENSE
+
TRIM
SENSE

V
OUT

V
IN

ON/OFF
LUCENT
JW050A1-E
V
IN
+
2
9
5V
8
7
6
5
1
4
+
C5
100礔
16V
+
4
3
2
1
APPLICATIO S
FEATURES
TYPICAL APPLICATIO
DESCRIPTIO
INRUSH
CURRENT
1A/DIV
GATE  V
EE
10V/DIV
DRAIN
50V/DIV
V
EE
50V/DIV
5ms/DIV
CONTACT
BOUNCE
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