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SC4150HISTRT Datasheet

  • SC4150HISTRT

  • Negative Voltage Hot Swap Controller

  • 352.97KB

  • 12頁

  • SEMTECH   SEMTECH

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Negative Voltage
Hot Swap Controller
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.
SC4150
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
Typical Application Circuit
GND
C1
0.1
8
PWRGD/PWRGD
1
U1
SC4150
PWRGD /PWRGD
VCC
GND(remote)
R1
562k
2
OV
DRAIN
7
VEE
Vee
R6
18k
3
UV
GATE
6
C4
3.3nF
C5
150
R2
9.31k
4
VEE
SENSE
5
R5
10
R3
10.2k
-- 48V
C2
0.001
R4
0.01
C3
0.33
Q1
Figure 1
Revision: April 14, 2004
1
www.semtech.com

SC4150HISTRT 產(chǎn)品屬性

  • 0現(xiàn)貨

  • 停產(chǎn)

  • -

  • 卷帶（TR）

  • 停產(chǎn)

  • 熱插拔控制器

  • 1

  • 無

  • -48V

  • 自動重試，故障超時

  • OVP，壓擺率，UVLO

  • 10V ~ 80V

  • -

  • -40°C ~ 125°C

  • 4 mA

  • 表面貼裝型

  • 8-SOIC（0.154"，3.90mm 寬）

  • 8-SO

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