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LTC4253B

更新时间： 2024-11-29 14:57:31
品牌 Logo 应用领域
亚德诺 - ADI 控制器
页数 文件大小 规格书
32页 368K
描述
具排序器的 -48V 热插拔控制器

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中文翻译

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LTC4253B 数据手册

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LTC4253B  
–48V Hot Swap Controller  
with Sequencer  
FeaTures  
DescripTion  
The LTC®4253B negative voltage Hot Swap™ controller  
allows a board to be safely inserted and removed from a  
livebackplane.Outputcurrentiscontrolledbythreestages  
of current-limiting: a timed circuit breaker, active current  
limiting and a fast feedforward path that limits peak cur-  
rent under worst-case catastrophic fault conditions. The  
LTC4253B latches off after a circuit fault.  
n
Allows Safe Board Insertion and Removal from a  
Live –48V Backplane  
n
Floating Topology Permits Very High Voltage  
Operation  
n
Adjustable Analog Current Limit with Breaker Timer  
Ideal for Two Battery Feeds  
n
Fast Response Time Limits Peak Fault Current  
n
Three Sequenced Power Good Outputs  
Adjustable undervoltage and overvoltage detectors dis-  
connect the load whenever the input supply exceeds the  
desired operating range. The LTC4253B’s supply input is  
shunt-regulated, allowing safe operation with very high  
supplyvoltages.Amultifunctiontimerdelaysinitialstart-up  
andcontrolsthecircuitbreaker’sresponsetime.Thecircuit  
breaker’s response time can be accelerated by sensing  
excessive MOSFET drain voltage, keeping the MOSFET  
within its safe operating area (SOA). An adjustable soft-  
start circuit controls MOSFET inrush current at start-up.  
n
Improved Ruggedness Shunt Regulator  
n
Adjustable Soft-Start Current Limit  
n
Adjustable Timer with Drain Voltage Accelerated  
Response  
Latchoff After Fault  
Available in a 16-Pin SSOP Package  
n
n
applicaTions  
n
–48V Distributed Power Systems  
n
Negative Power Supply Control  
Threepowergoodoutputsaresequencedbyanadjustable  
timer and two ENABLE inputs to enable external power  
modules at start-up or disable them if the circuit breaker  
trips. The LTC4253B improves the ruggedness of the  
LTC4253 shunt regulator.  
n
Central Office Switching  
n
High Availability Servers  
n
Disk Arrays  
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.  
Typical applicaTion  
–48V/2.5A Hot Swap Controller  
–48V RTN  
Start-Up Behavior  
2.5k  
15k(1/4W)/6  
+
V
1µF  
IN  
LOAD1  
100µF  
5.6k  
–48V RTN  
LOAD2  
EN  
5.6k  
5.6k  
GATE  
10V  
402k  
1%  
EN3  
EN2  
LTC4253B  
RESET  
V
10nF  
LOAD3  
EN  
IN  
EN  
††  
D
IN  
DDZ13B*  
SS  
1V  
†
†
†
UV  
PWRGD1  
PWRGD2  
PWRGD3  
4253b TA01  
SENSE  
50mV  
OV  
SS  
32.4k  
1%  
68nF  
DRAIN  
0.1µF  
SQTIMER  
1M  
*DIODES, INC.  
IRF530S  
V
GATE  
OUT  
†
B3100*  
B3100*  
MOC207  
0.33µF  
50V  
–48V A  
–48V B  
††  
TIMER  
V
SENSE  
RECOMMENDED FOR HARSH ENVIRONMENTS.  
10Ω  
EE  
4253b TA01b  
1ms/DIV  
0.02Ω  
18nF  
4253bf  
1
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中文翻译

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LTC4253BCGN#PBF Linear

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LTC4253IGN#TR Linear

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 		LTC4253/LTC4253A - -48V Hot Swap Controller with Sequencer; Package: SSOP; Pins: 16; Tempe
LTC4253IGN#TRPBF Linear

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 		LTC4253/LTC4253A - -48V Hot Swap Controller with Sequencer; Package: SSOP; Pins: 16; Tempe
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LTC4255CG#PBF Linear

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