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LTC4222_12

更新时间： 2024-11-12 11:45:11
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
32页 334K
描述
Dual Hot Swap Controller

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LTC4222_12 数据手册

 浏览型号LTC4222_12的Datasheet PDF文件第2页浏览型号LTC4222_12的Datasheet PDF文件第3页浏览型号LTC4222_12的Datasheet PDF文件第4页浏览型号LTC4222_12的Datasheet PDF文件第5页浏览型号LTC4222_12的Datasheet PDF文件第6页浏览型号LTC4222_12的Datasheet PDF文件第7页 
LTC4222  
Dual Hot Swap Controller  
2
with I C Compatible  
Monitoring  
FEATURES  
DESCRIPTION  
The LTC®4222 Hot Swap™ controller allows two power  
paths to be safely inserted and removed from a live back-  
plane. Using external N-channel pass transistors, board  
supply voltages and inrush currents are ramped up at an  
adjustable rate. An I C interface and onboard ADC allows  
for monitoring of current, voltage and fault status for  
each channel.  
n
Allows Safe Insertion Into a Live Backplane  
n
10-Bit ADC Monitors Currents and Voltages  
2
n
I C/SMBus Interface  
n
Wide Operating Voltage Range: 2.9V to 29V  
2
n
dI/dt Controlled Soft-Start  
n
High Side Drive for External N-Channel MOSFETs  
n
No External Gate Capacitors Required  
n
Input Overvoltage/Undervoltage Protection  
The device features adjustable, analog, foldback current  
limit circuits and a soft-start circuit that sets the dI/dt of  
the inrush currents. An I C interface may configure the  
part to latch off or automatically restart after the LTC4222  
detects a fault on either channel.  
n
Optional Latchoff or Auto-Retry After Faults  
n
Alert Host After Faults  
2
n
Inrush Current Limit with Foldback  
n
Available in 32-Pin (5mm × 5mm) QFN  
and 36-Pin SSOP Packages  
The controller has additional features to interrupt the host  
when a fault has occurred, notify when output power is  
good, detect insertion of a load card and power-up either  
APPLICATIONS  
n
Live Board Insertion  
2
automatically upon insertion or wait for an I C command  
n
Electronic Circuit Breakers  
to turn on.  
n
Computers, Servers  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot  
Swap is a trademark of Linear Technology Corporation. All other trademarks are the property of  
their respective owners. Protected by U.S. Patents including 7330065.  
n
Platform Management  
TYPICAL APPLICATION  
Advanced Mezzanine Card Application  
6mΩ  
Si7336ADP  
12V  
7.4A  
12V  
34k  
10.2k  
3.57k  
10Ω  
–
0.1µF  
Start-Up Waveform with Sequencing  
10k  
1.02k  
UV1  
OV1  
ON  
SDA  
SCL  
V
SENSE1 GATE1 SOURCE1  
DD1  
3.4k  
FB1  
GPIO1  
EN1  
V
IN1/2  
10V/DIV  
12PGOOD  
ON  
SDA  
SCL  
ADIN1  
ALERT  
ALERT  
TIMER  
V
OUT2  
10V/DIV  
CONFIG  
ADR0  
ADR1  
ADR2  
1µF  
LTC4222  
NC  
SS  
V
OUT1  
68nF  
10V/DIV  
ADIN2  
INTV  
CC  
0.1µF  
EN2  
GPIO  
PGOOD  
10V/DIV  
GND  
OV2  
UV2  
GPIO2  
FB2  
AUXPGOOD  
3.4k  
–
V
DD2  
SENSE2 GATE2 SOURCE2  
4222 TA01b  
1.02k  
50ms/DIV  
3.57k  
4.99k  
10Ω  
10nF  
10k  
0.1µF  
3.3V  
6.55k  
3.3V  
150mA  
Si1046R  
300mΩ  
BACKPLANE PLUG-IN  
CARD  
4222 TA01a  
4222fb  
1
1234567...32

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