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LTC4238

更新时间： 2022-05-14 22:22:07
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
32页 1451K
描述
High Voltage High Current Hot Swap Controller

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LTC4238 数据手册

 浏览型号LTC4238的Datasheet PDF文件第2页浏览型号LTC4238的Datasheet PDF文件第3页浏览型号LTC4238的Datasheet PDF文件第4页浏览型号LTC4238的Datasheet PDF文件第5页浏览型号LTC4238的Datasheet PDF文件第6页浏览型号LTC4238的Datasheet PDF文件第7页 
LTC4238  
High Voltage High Current  
Hot Swap Controller  
FEATURES  
DESCRIPTION  
The LTC®4238 is a high voltage high current Hot Swap  
controller that allows a board to be safely inserted and  
removed from a live backplane. Dual 12V gate drive is  
well suited for high power applications to either share  
safe operating area across parallel MOSFETs or support  
a 2-stage start-up that first charges the load capacitance  
followed by enabling a low on-resistance path to the load.  
n
Allows Safe Board Insertion into Live Backplane  
n
Wide Operating Voltage Range: 6.5V to 80V  
n
Drives Two Gates for High Power Applications  
n
Configurable Parallel, Staged Start or  
Single MOSFET Modes  
n
Adjustable Precision Current Limit: 6mV to 20mV  
n
Current Foldback Limits MOSFET Power  
n
SOA Timer Optimizes MOSFET Capability  
The device features active current limiting (ACL) with two  
foldback options as V increases. The constant power  
profile limits the power dissipation to be no higher than  
a fixed value, while the high power profile allows the part  
to ride through large input steps during operation.  
n
Monitors V and V for MOSFET Health  
GS  
DS  
DS  
n
n
n
12V Gate Drive for Lower MOSFET R  
DS(ON)  
Parallelable Controllers for Very High Current Levels  
Available in 24-Lead Narrow SSOP and 24-Pin  
4mm × 5mm QFN Packages  
The LTC4238 notifies when output power is good. In  
addition, it has protection features that respond to input  
undervoltage, overvoltage; and generate a fault when  
there is an overcurrent or FET bad condition.  
APPLICATIONS  
n
Live Board Insertion in 12V, 24V and 48V Systems  
n
Industrial High Side Switch/Circuit Breaker  
All registered trademarks and trademarks are the property of their respective owners. Protected  
by U.S. patents, including 9634480, 9634481, 9671465B2, 10003190B2. More patents pending.  
n
Computers, Servers  
Vehicle Electrical Systems  
n
TYPICAL APPLICATION  
48V, 63A Hot Swap Controller in Low Stress Staged Start Mode  
4mΩ  
ꢀꢁꢂRꢁꢃꢄꢅ ꢆꢇꢁ  
ꢀ
ꢀꢁꢂ  
ꢀꢁꢂ  
ꢁꢂꢃ  
ꢀꢁꢂ  
ꢀꢁꢂꢃꢄꢄ ꢅꢆꢇ  
0.2mΩ  
ꢀꢁꢂꢃꢄꢅ0ꢆ  
ꢇꢈ  
ꢀꢁꢂꢃꢄꢄ ꢅꢆꢇ  
Start-Up Behavior  
ꢀ
ꢁ
10Ω  
10Ω  
10Ω  
ꢀ
ꢁꢁ  
ꢂ0ꢀꢃꢁꢄꢀ  
ꢀꢁꢂꢃꢄꢀꢃ ꢅꢁꢆꢂꢀꢇꢈ  
ꢀꢁ.ꢂꢃ  
ꢄ
ꢄ
ꢄ
ꢄ
ꢀ
ꢀꢁꢂꢀꢁꢃ ꢀꢁꢂꢀꢁꢃ ꢀꢁꢂꢀꢁꢃ ꢀꢁꢂꢀꢁꢃ  
ꢀꢁꢂꢃꢄ ꢀꢁꢂꢃꢄ  
ꢀꢁꢂRꢃꢄ  
ꢁꢁ  
∆V  
GATE2  
10V/DIV  
ꢀ0ꢁꢂ ꢃꢄꢅꢆꢇꢈꢉꢄ  
ꢀꢁ  
ꢀꢁ0ꢂ  
∆V  
ꢀꢁꢂꢃꢄꢅ ꢀꢁꢂRꢁ  
GATE1  
ꢀꢁꢂꢃ  
ꢀ
ꢀꢁꢂ  
ꢁꢂꢃꢄ  
ꢀꢁ  
10V/DIV  
ꢀꢁꢂꢃꢄꢅꢆ  
ꢀ.0ꢁꢂ  
ꢀꢁ  
ꢀ
ꢀꢁ  
ꢁꢂꢃ  
ꢀ.ꢁꢂꢃ  
ꢄ0ꢀꢅꢆꢇꢀ  
ꢀꢁꢂꢂ  
ꢀꢁꢂꢃ ꢄꢅ0ꢆꢇ  
ꢀꢁꢂꢃ  
ꢄꢄ  
ꢀꢁꢂꢃꢄꢅꢆ ꢀꢁꢂꢃ ꢀꢁꢂꢃꢄꢅꢆ  
ꢀꢁRꢂꢃꢀ  
ꢀꢁꢂ ꢀꢁR  
ꢀꢁꢂꢃ ꢄꢅ0ꢆꢇ  
ꢀ.ꢁꢁꢂ  
ꢀ0ꢁꢂꢃꢄꢅꢆ  
ꢀꢁꢂ  
0.ꢀꢁꢂ  
ꢀ.ꢁꢂꢃ  
ꢀꢁ0ꢂꢃ  
ꢀꢀ.ꢁꢂ  
ꢀꢁꢂ  
ꢀꢁꢂꢃꢄꢅꢁꢆꢇ ꢀꢁꢂꢃꢄꢅꢆ  
ꢀꢁꢂRꢃ  
Rev. 0  
1
Document Feedback  
For more information www.analog.com  
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