參數(shù)資料
型號: MIC2580
廠商: Micrel Semiconductor,Inc.
元件分類: 基準(zhǔn)電壓源/電流源
英文描述: Hot-Swap PCI Power Controller(熱交換PCI功率控制器)
中文描述: 熱插拔PCI電源控制器(熱交換的PCI功率控制器)
文件頁數(shù): 1/24頁
文件大?。?/td> 288K
代理商: MIC2580
July 2000
1
MIC2580
MIC2580
Micrel
MIC2580
Hot-Swap PCI Power Controller
Preliminary Information
General Description
The MIC2580 is a hot-swap controller that provides for safe
and orderly insertion and removal of PCI based adapter cards
from a PCI hot-plug compliant system backplane or
CompactPCI system.
The MIC2580 incorporates a circuit breaker function that
protects all four supplies (+12V, +5V, +3.3V, and –12V) upon
an overcurrent fault condition. Current foldback limiting pre-
vents large transient currents caused by plugging adapter
cards into live backplanes, such as in a CompactPCI system.
A programmable slew-rate control limits high inrush currents
to all loads that occur when power is applied to large capaci-
tive loads.
Voltage supervisory functions for all four power supplies are
provided by “power good” (/PWRGD) and “overcurrent fault”
(/FAULT) diagnostic outputs. Power good and overcurrent
fault include deglitch filters to prevent nuisance tripping.
Power good is active when all four supplies are within
tolerance. Fault (/FAULT) goes active upon overcurrent or
overtemperature conditions. The on-off control input (/ON) is
used to cycle power to the adapter card.
Typical Application
12VOUT
5VSENSE
5VGATE
5VOUT
3VGATE
3VOUT
VPCHG
/POR
CRST
12VIN
/FAULT
CSTART
GND
/LPCIRST
5VIN
3VIN
/PCIRST
/ON
CSLEW
/EPWRGD
/PWRGD
M12VIN
MIC2580
3VSENSE
IRF7413
IRF7413
+3.3V
+5V
+12V
M12VOUT
+12V
+5V
+3.3V
GND
12V
12V
10m
10m
V
= +1V
±
20%
(PPCH
D
/HEALTHY
/BD_SEL
/PCI_RST
VIO
12V/1A
GND
+3.3V/8A
+5V/8A
+12V/1A
/ENUM
D
/ON
/PCIRST
/PGD
A
P
Overcurrent
Fault
V
IO
D0
D1
D2
D0
D1
D2
Dn
Dn
V
IO
PCI
Controller
/LPCIRST
1.2k
CompactPCI Adapter with Early Power
Features
PCI hot-plug and CompactPCI
hot-swap support
+12V, +5V, +3.3V, and
12V power supply control
Circuit breaker function to protect system
Programmable slew rate control for all supplies
Foldback current-limiting
+5V and +3.3V programmable current-limit thresholds
Undervoltage and overcurrent diagnostic outputs
Deglitch filters on diagnostic fault outputs
Integrated +12V and
12V MOSFET switches
Integrated high-side drivers for 3.3V and 5V external
switches
Precharge supply for CompatPCI
I/O termination
Applications
PCI hot-plug systems
CompactPCI
hot-swap systems
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
Compact PCI is a trademark of the
PCI Industrial Computer Manufacturer
s Group.
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PDF描述
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