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LTC1644

更新时间： 2024-11-05 22:57:35
品牌 Logo 应用领域
凌特 - Linear 控制器PC
页数 文件大小 规格书
24页 445K
描述
CompactPCI Bus Hot Swap Controller

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中文翻译

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LTC1644 数据手册

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LTC1644  
CompactPCI Bus  
Hot Swap Controller  
U
FEATURES  
DESCRIPTIO  
■
Allows Safe Board Insertion and Removal from a  
TheLTC®1644isaHotSwapTM controllerthatallowsaboard  
to be safely inserted and removed from a CompactPCI bus  
slot. External N-channel transistors control the 3.3V/5V  
supplies, while on-chip switches control the  
–12V and 12V supplies. The 3.3V and 5V supplies can be  
rampedupataprogrammablerate.Electroniccircuitbreak-  
ers protect all four supplies against overcurrent faults. The  
PWRGDoutputindicateswhenallofthesupplyvoltagesare  
within tolerance. The OFF/ON pin is used to cycle the board  
power or reset the circuit breaker. The PRECHARGE output  
can be used to bias the bus I/O pins during card insertion  
and extraction. PCI_RST# is combined on-chip with  
HEALTHY# in order to generate LOCAL_PCI_RST#.  
Live, CompactPCITM Bus  
■
Controls –12V, 3.3V, 5V and 12V Supplies  
■
Adjustable Foldback Current Limit with Circuit  
Breaker  
■
Dual-Level Circuit Breakers Protect 5V and 3.3V  
Supplies from Overcurrent and Short-Circuit Faults  
■
LOCAL_PCI_RST# Logic On-Chip  
■
PRECHARGE Output Biases I/O Pins During Card  
Insertion and Extraction  
Adjustable Supply Voltage Power-Up Rate  
■
U
APPLICATIO S  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Hot Swap is a trademark of Linear Technology Corporation.  
CompactPCI is a trademark of the PCI Industrial Computer Manufacturers Group.  
■
Hot Board Insertion into CompactPCI Bus  
U
TYPICAL APPLICATIO  
C9  
C8  
0.1µF  
PER 10  
POWER  
PINS  
0.1µF  
PER 10  
POWER  
PINS  
PCB EDGE  
BACKPLANE BACKPLANE  
CONNECTOR CONNECTOR  
R2  
Q2  
0.007Ω  
IRF7413  
5V  
*
IN  
5V  
OUT  
5V AT 5.7A  
5V  
+
+
C
C
R22 2.74Ω  
R1  
LOAD(5VOUT)  
Q1  
LONG 5V  
3.3V  
0.005Ω  
3V  
*
IRF7413  
IN  
3V  
OUT  
3.3V AT 8A  
R21 1.74Ω  
LOAD(3VOUT)  
Z3  
Z4  
LONG 3.3V  
C1  
R3  
10Ω  
R4  
10Ω  
R5  
1k  
0.047µF  
C6  
0.01µF  
C7  
0.01µF  
17  
16  
15  
18  
13  
14  
3
3V  
IN  
3V  
GATE 3V  
5V  
IN  
5V  
SENSE  
5V  
OUT  
SENSE  
OUT  
20  
12V  
OUT  
12V AT 500mA  
12V  
OUT  
Z1  
Z2  
+
C
C
LOAD(12VOUT)  
1
2
12V  
12V  
IN  
19  
4
V
EEOUT  
–12V AT 100mA  
V
EEOUT  
–12V  
V
EEIN  
LOAD(VEEOUT)  
R19  
1k  
+
5V  
IN  
LTC1644  
5
6
R20 1.2k  
20-PIN SSOP  
OFF/ON  
FAULT  
BD_SEL#  
EARLY V(I/O)  
TIMER  
C2  
0.1µF  
R17  
2k  
R18  
2k  
7
9
R6  
2k  
HEALTHY#  
PCI_RST#  
PWRGD  
10  
RESETIN  
RESETOUT  
R8 1k  
3V  
OUT  
GND  
8
PRECHARGE  
12  
DRIVE  
11  
R15  
1Ω  
R16  
1Ω  
R9  
24Ω  
R10  
18Ω 5%  
C4  
C5  
0.01µF  
C3 4.7nF  
R12  
0.01µF  
3V  
GROUND  
IN  
Q3  
R7  
12Ω  
R11  
51k  
RESET#  
PCI  
1V  
±10%  
MMBT2222A  
51k  
R13 10Ω  
R14 10Ω  
I/O DATA LINE 1  
I/O #1  
I/O PIN 1  
BRIDGE  
CHIP  
I/O DATA LINE 128  
I/O #128  
I/O PIN 128  
1644 F01  
Z1, Z2: SMAJ12CA Z3, Z4: 1PMT5.0AT3 *5V AND 3V MAY BE USED AS SOURCES OF EARLY POWER  
IN IN  
Figure 1  
1644f  
1
1234567...24

中文翻译

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