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LTC4228

更新时间： 2024-09-24 14:57:31
品牌 Logo 应用领域
亚德诺 - ADI 控制器二极管
页数 文件大小 规格书
24页 378K
描述
双通道理想二极管和热插拔控制器

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中文翻译

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LTC4228 数据手册

 浏览型号LTC4228的Datasheet PDF文件第2页浏览型号LTC4228的Datasheet PDF文件第3页浏览型号LTC4228的Datasheet PDF文件第4页浏览型号LTC4228的Datasheet PDF文件第5页浏览型号LTC4228的Datasheet PDF文件第6页浏览型号LTC4228的Datasheet PDF文件第7页 
LTC4228-1/LTC4228-2  
Dual Ideal Diode and  
Hot Swap Controller  
FeaTures  
DescripTion  
The LTC®4228 offers ideal diode and Hot Swap™ functions  
for two power rails by controlling two external N-channel  
MOSFETs in each rail. MOSFETs acting as ideal diodes re-  
place two high power Schottky diodes and the associated  
heat sinks, saving power and board area. Hot Swap control  
MOSFETs allow boards to be safely inserted and removed  
fromalivebackplanebylimitinginrushcurrent.Thesupply  
output is also protected against short-circuit faults with a  
fast acting current limit and internal timed circuit breaker.  
n
Power Path and Inrush Current Control for  
Redundant Supplies  
n
Low Loss Replacement for Power Schottky Diodes  
n
Protects Output Voltage from Input Brownouts  
n
Allows Safe Hot Swapping from a Live Backplane  
n
2.9V to 18V Operating Range  
n
Controls N-Channel MOSFETs  
n
Limits Peak Fault Current in ≤1µs  
n
Adjustable Current Limit with Circuit Breaker  
n
Adjustable Current Limit Fault Delay  
The LTC4228 regulates the forward voltage drop across  
theexternalMOSFETsandsenseresistortoensuresmooth  
current transfer from one supply to the other without  
oscillation. The ideal diodes turn on quickly to reduce  
the load voltage droop during supply switch-over. If the  
input supply fails or is shorted, a fast turn-off minimizes  
reverse-current transients.  
n
Smooth Switchover without Oscillation  
n
0.5µs Ideal Diode Turn-On and Turn-Off Time  
n
Status, Fault and Power Good Outputs  
n
LTC4228-1: Latch Off After Fault  
n
LTC4228-2: Automatic Retry After Fault  
n
28-Lead 4mm × 5mm QFN and SSOP Packages  
TheLTC4228allowsindependenton/offcontrol,andreports  
fault and power good status for the supply. The LTC4228  
improvesontheLTC4225byrecoveringmorequicklyfrom  
input brownouts to preserve the output voltage.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. All other  
trademarks are the property of their respective owners.  
applicaTions  
n
Redundant Power Supplies  
n
MicroTCA Systems and Servers  
n
Telecom Networks  
n
Power Prioritizer  
Typical applicaTion  
µTCA Application  
PLUG-IN  
CARD 1  
Smooth Supply Switchover  
Si7336ADP  
Si7336ADP  
0.004Ω  
12V  
7.6A  
12V  
0.1µF  
+
–
CPO1  
IN1 DGATE1 SENSE1 SENSE1 HGATE1 OUT1  
IN1  
1V/DIV  
STATUS1  
FAULT1  
PWRGD1  
EN1  
137k  
IN2  
1V/DIV  
ON1  
47nF  
47nF  
20k  
TMR1  
I
IN1  
2A/DIV  
INTV  
GND  
CC  
LTC4228  
0.1µF  
PLUG-IN  
CARD 2  
TMR2  
EN2  
PWRGD2  
FAULT2  
20k  
I
IN2  
2A/DIV  
ON2  
STATUS2  
137k  
+
–
CPO2  
IN2 DGATE2 SENSE2 SENSE2 HGATE2 OUT2  
422512 TA01b  
200ms/DIV  
0.1µF  
12V  
7.6A  
12V  
Si7336ADP  
Si7336ADP  
0.004Ω  
BACKPLANE  
422812 TA01a  
422812f  
1
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中文翻译

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