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參數資料
| 型號： | SMH4802 |
| 廠商： | Summit Microelectronics, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Programmable -48V Hot-Swap Controller with Forced Shut Down |
| 中文描述： | 可編程的- 48V熱插拔控制器強制關機 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 573K |
| 代理商： | SMH4802 |
Characteristics subject to change without notice
2062 2.3 6/19/03
SMH4802
SUMMIT
MICROELECTRONICS, Inc.
SUMMIT MICROELECTRONICS, Inc., 2003
1717 Fox Drive
San Jose, CA 95131
Phone 408-436-9890
FAX 408-436-9897
www.summitmicro.com
Preliminary Information
See Last Page
Programmable -48V Hot-Swap Controller with Forced Shut Down
FEATURES & APPLICATIONS
SIMPLIFIED APPLICATION DRAWING
Soft Start Power Supply
Live Insertion into a -48V backplane
Programmable Control of a DC/DC Converter
I
2
C Power On/Off Control
Highly Programmable Circuit Breaker
Active In-rush Current Limiting
Over-current Filter Circuit Breaker Immunity
to Voltage Steps and Current Spikes
Programmable Forced Shutdown Timer
Internal Shunt Regulator Allows a Wide Supply
Range
14-pin SOIC and 16-pin SSOP packages
APPLICATIONS
-48V Power Distribution
Telecom Line Cards
Central Office Switching
High Availability Servers
Hot Board Insertion
The SMH4802 is designed to control in-rush current
during hot swapping of plug-in cards operating in a
distributed power environment. The device drives an
external power MOSFET switch that connects the supply
to the load and protects against over-current conditions
that might disrupt the host supply. It also provides under-
voltage and over-voltage monitoring of the host power
supply. When the source and drain voltages of the
external MOSFETs are within specification it will provide
a Power Good logic output that can be used to enable a
DC/DC converter. Additional features of the device
include: temperature sense or master enable input, a 5V
reference output for expanding monitor functions, and
duty-cycle or latched over-current protection modes. An
internal Shunt regulator allows a wide supply range. The
SMH4802 -48V Hot-Swap Controller also features a
simple software I
2
C Power On/Off Interface for remote
power control applications.
Programming of configuration, control and calibration val-
ues by the user can be simplified with the SMX3200
interface adapter and a windows based GUI supplied by
Summit.
INTRODUCTION
Figure 1. The drawing illustrates the SMH4802 in a typical line-card application. It should be noted this is just an
example, and the specific component values are purposely not shown. Pin numbers reflect SOIC package.
V
DD
UV
OV
PG#
5VREF
11
2062 SAD
–48V Ret
–48V B
SDA
SCL
DC/DC
SMH4802
FS#
DRAIN
SENSE
1
14
5
4
10
12
9
8
–48V A
I
2
C
Header
R
D
EN/TS
3
V+
V–
Out–
Out+
On/
Off
VSS
CBSENSE
VGATE
2
6
7
R
S
V
SS
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相關代理商/技術參數 |
參數描述 |
|---|---|
| SMH4802_09 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Programmable -48V Hot-Swap Controller with Forced Shut Down |
| SMH4803 | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Distributed Power Hot-Swap Controller |
| SMH4803A | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Distributed Power Hot Swap Controller |
| SMH4803AEK | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Distributed Power Hot-Swap Controller |
| SMH4803AEKP | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Distributed Power Hot-Swap Controller |
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