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SC4150 Datasheet(数据表) 1 Page - Semtech Corporation

部件型号  SC4150
说明  Negative Voltage Hot Swap Controller
下载  12 Pages
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制造商  SEMTECH [Semtech Corporation]
网页  http://www.semtech.com
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SC4150 Datasheet(HTML) 1 Page - Semtech Corporation

 
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www.semtech.com
SC4150
Negative Voltage
Hot Swap Controller
POWER MANAGEMENT
Revision: April 14, 2004
Programmable slew of the inrush current when
used for hot insertion in the negative 24V and 48V
backplane
Closed loop operation limits the maximum current
even in short circuit condition
Built in timer prevents false shutdown, when the
closed loop operation limits the current.
Sensing the drain voltage allows for immediate
shutdown in short circuit condition, where current
spikes and noise is ignored.
Power good signal
Input UVLO and OVLO sensing
SO-8 package
Central office switching
-48V Distributed power systems
Power supply hotswap & inrush control
Description
Features
Applications
Typical Application Circuit
The SC4150 is a negative voltage hotswap controller that
allows the insertion of line cards into a live backplane.
The inrush current is programmable and closed loop op-
eration limits the maximum current even under short cir-
cuit conditions. A built in timing circuit prevents false shut-
down. The signal from the drain voltage is fed to the
timer, providing safety for the MOSFET when in linear
mode. The SC4150 latches off under abnormal condi-
tion and attempts to restart after a time out period.
The device comes in two options, PWRGD (SC4150H)
and PWRGD (SC4150L). These signals can be directly
used to enable power modules.
Figure 1
Q1
C3
0.33
C5
150
GND
-- 48V
R5
10
R1
562k
R3
10.2k
R4
0.01
R6
18k
R2
9.31k
C4
3.3nF
DRAIN
7
UV
3
VEE
4
GATE
6
PWRGD
1
SENSE
5
VCC
8
OV
2
U1
SC4150
GND(remote)
C2
0.001
C1
0.1
Vee
PWRGD/PWRGD
/PWRGD
VEE




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