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PDF SC4150 Data sheet ( Hoja de datos )
| Número de pieza | SC4150 | |
| Descripción | Negative Voltage Hot Swap Controller | |
| Fabricantes | Semtech | |
| Logotipo |  |
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POWER MANAGEMENT
Description
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.
Typical Application Circuit
SC4150
Negative Voltage
Hot Swap Controller
Features
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
Applications
Central office switching
-48V Distributed power systems
Power supply hotswap & inrush control
GND
PWRGD/PWRGD
GND(remote)
R1
562k
R2
9.31k
R3
10.2k
-- 48V
U1
SC4150
1 PWRGD /PWRGD
VCC 8
2 OV
DRAIN
7
3 UV
GATE
6
4 VEE
SENSE
5
C1
0.1
VVeEeE
R6 C4
18k 3.3nF
C2
0.001
R4
0.01
C3
0.33
R5
10
Q1
C5
150
Figure 1
Revision: April 14, 2004
1
www.semtech.com
1 page  
POWER MANAGEMENT
Block Diagram
Active High PWRGD
Vcc
12.5V Reg
UV _
+
_
OV
+
60mV
_
+
Active Low PWRGD
Vee SENSE
Vcc
12.5V Reg
UV _
+
_
OV
+
60mV
_
+
Vee SENSE
2004 Semtech Corp.
SC4150
1.223V
50uA
PWRGD
_ +7V
+
Delay
Timer
_+
1.75V
GATE
DRAIN
1.223V
50uA
PWRGD
_ +7V
+
Delay
Timer
GATE
5
DRAIN
_+
1.75V
www.semtech.com
5 Page 
POWER MANAGEMENT
Evaluation Board - Bill of Materials
Ref Qty
Designator
Value
1 1 C1
2 1 C2 (opt.)
3 1 C3
4 1 C4
5 1 C5
6 1 C6 (opt.)
7 1 Q1
8 1 R1
9 1 R2
10 1 R3
11 1 R4
12 1 R5
13 1 R6
14 1 R7
15 1 U1
0.1/100V
0.01
0.33
0.0033/100V
150/80V
0.1/100V
IRF1310
562k
9.31k
10.2k
0.01
10
18k
5.1k
SC4150
SC4150
Description
Ceramic cap
Ceramic cap
Ceramic cap
Ceramic cap
Aluminum cap
Ceramic cap
MOSFET
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Semtech IC
Footprint
1210
0805
1206S
0805
CAP-AL-H
1210
D2PAK
0805
0805
0805
2010CS
0805
0805
1206S
SO-8
2004 Semtech Corp.
11
www.semtech.com
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet SC4150.PDF ] | |
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