參數(shù)資料
型號(hào): LT1640LIN8
廠商: LINEAR TECHNOLOGY CORP
元件分類: 電源管理
英文描述: Negative Voltage Hot Swap Controller
中文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP8
封裝: 0.300 INCH, PLASTIC, DIP-8
文件頁(yè)數(shù): 1/12頁(yè)
文件大?。?/td> 292K
代理商: LT1640LIN8
1
LT1640L/LT1640H
Negative Voltage
Hot Swap Controller
FEATURES
I
Allows Safe Board Insertion and Removal
from a Live –48V Backplane
I
Operates from –10V to –80V
I
Programmable Inrush Current
I
Programmable Electronic Circuit Breaker
I
Programmable Overvoltage Protection
I
Programmable Undervoltage Lockout
I
Power Good Control Output
The LT
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
(LTC1640L) or PWRGD (LTC1640H) 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.
DESCRIPTIO
N
U
I
Central Office Switching
I
–48V Distributed Power Systems
I
Negative Power Supply Control
APPLICATIO
S
U
Hot Swap is a trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
N
U
Input Inrush Current
CONTACT
BOUNCE
1640 F07b
V
EE
V
DD
LT1640L
SENSE
C1
33nF
24V
C3
0.1
μ
F
100V
C4
100
μ
F
100V
Q1
IRF530
R2
10
5%
R3
10k
5%
C2
3.3nF
100V
R4
562k
1%
R5
9.09k
1%
R6
10k
1%
R1
0.02
5%
4
OV
GND
3
2
–48V
OV = 71V
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
8
5V
7
6
5
1
4
+
C5
100
μ
F
16V
+
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