參數資料
型號： MCP18480
廠商： Microchip Technology Inc.
元件分類： 基準電壓源/電流源
英文描述： -48V Hot Swap Controller
中文描述： - 48V熱插拔控制器
文件頁數： 1/64頁
文件大?。?/td> 871K
代理商： MCP18480
2003 Microchip Technology Inc.
DS20091B-page 1
M
MCP18480
Features
Allows safe board removal and insertion from a
live backplane
Accurate (<1.5%) internal voltage reference for
fault detection and precision timing
Programmable foldback current limiting
Programmable circuit breaker current limiting
Auto restart option for all faults
Adjustable Undervoltage lockout thresholds
Adjustable Overvoltage protection threshold
Adjustable Power Good delay
Configurable Power Good output polarity
Low-side drive of an external N-channel FET
CMOS Technology
High-Voltage Operation
Temperature range: Industrial (I): -40°C to +85°C
Packaging
20-lead SSOP
Package Type
Description
The MCP18480 is a Hot Swap controller that allows
boards to be safely removed or inserted from an active
backplane using -48V.
When PCBs are inserted into a live backplane, high-
peak or transient currents from the source are gener-
ated due to the charging of the bypass capacitors on
the supply. The high transient currents can destroy
connectors and capacitors. The high inrush current can
pull the input voltage BUS down and reset the system.
The MCP18480 solves this problem by controlling the
slew rate of the backplane voltage to the board so that
these transients are eliminated. This allows boards to
be removed and inserted without causing damage to
connector pins and input bulk capacitors, in addition to
preventing false resets to the other boards on the
backplane.
The MCP18480 can be used in applications in several
areas including:
Telecom Line Cards
Network Switches
Network Routers and Servers
Base Station Line Cards
Power-Over-LAN
Power-Over-MDI
IP Phone Switches/Routers
Mid-Span, Power-Over-MDI
Two forms of current limit are provided in the
MCP18480. These are:
Foldback
Circuit breaker
The foldback current-limiting circuit uses an external
sense resistor and a voltage that is proportional to the
external MOSFET’s drain voltage. These are used to
keep the MOSFET in its Safe Operating Area (SOA).
If the device remains in current limit for a programmed
time period, the external N-channel FET is turned off.
The option exists to configure the device to automati-
cally restart after a programmed time delay. A program-
mable catastrophic current limit threshold shuts down
the switch (circuit breaker) if excessive current is
sensed due to a short-circuit condition.
2
3
4
5
6
7
8
9
10
1
19
18
16
15
14
13
12
11
17
20
ENABLE
PWRGOOD
RESTART
UV
D
V
REFIN
OVO
DRAIN
TH
V
FB
GATE
SENSE
CL
I
SET
TIMER
R
DISCH
V
NEG
OV
TH
UV
TH
UV
HYS
V
REFOUT
V
POS
M
SSOP
-48V Hot Swap Controller
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相關代理商/技術參數
參數描述
MCP18480-I/SS 功能描述:熱插拔功率分布 48V Hot Swap RoHS:否 制造商:Texas Instruments 產品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MCP18480T-I/SS 功能描述:熱插拔功率分布 48V Hot Swap RoHS:否 制造商:Texas Instruments 產品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MCP-18H 制造商:Taiyo Electric Ind. 功能描述:
MCP-18-I9-LL 制造商:YAMAICHI 制造商全稱:Yamaichi Electronics Co., Ltd. 功能描述:MatchCon
MCP-18-TI9-LL 制造商:YAMAICHI 制造商全稱:Yamaichi Electronics Co., Ltd. 功能描述:MatchCon
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