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LTC4231 PDF预览

LTC4231

更新时间： 2023-12-20 18:44:29
品牌 Logo 应用领域
亚德诺 - ADI 控制器
页数 文件大小 规格书
22页 1318K
描述
微功率热插拔控制器

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中文翻译

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LTC4231 数据手册

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LTC4231  
Micropower Hot Swap  
Controller  
FEATURES  
DESCRIPTION  
The LTC®4231 is a micropower Hot Swap controller that  
allows safe circuit board insertion and removal from a live  
power supply. An internal high side switch driver controls  
the gate of an external N-channel MOSFET. Back-to-back  
MOSFETs can be used for reverse supply protection down  
to –40V.  
n
Enables Safe Board Insertion and Removal from a  
Power Supply  
n
4µA Supply Current  
n
0.3µA Shutdown Current  
n
Wide Operating Voltage Range: 2.7V to 36V  
n
Reverse Supply Protection to –40V  
n
Adjustable Analog Current Limit with Circuit Breaker  
The LTC4231 provides a debounce delay and allows the  
GATE to be ramped up at an adjustable rate. After start-  
up, the LTC4231's quiescent current drops to 4µA during  
normal operation with output active. UVL, UVH, OV and  
GNDSW monitor overvoltage and undervoltage periodi-  
cally, keeping total quiescent current low. Pulling SHDN  
low shuts down the LTC4231 and quiescent current drops  
to 0.3µA.  
n
Automatic Retry or Latchoff on Current Fault  
Overvoltage and Undervoltage Monitoring  
n
n
Controls Single or Back-to-Back N-Channel MOSFETs  
n
12-Lead MSOP and 3mm × 3mm QFN Packages  
n
AEC-Q100 Qualified for Automotive Applications  
APPLICATIONS  
During an overcurrent fault, the LTC4231 actively limits  
current while running an adjustable timer. The LTC4231-1  
remains off after a current fault while the LTC4231-2 auto  
matically reapplies power after a cool-down period.  
All registered trademarks and trademarks are the property of their respective owners.  
n
Battery Powered Equipment  
n
Solar Powered Systems  
-
n
Portable Instruments  
n
Automotive Battery Protection  
n
Energy Harvesting  
TYPICAL APPLICATION  
Battery Hot Swap with Reverse Protection  
Power-Up Waveforms  
V
24V  
2A  
SMAJ24CA  
22.5mΩ  
OUT  
Si7164DP  
Si5410DU  
ꢎꢌꢊꢂꢁꢎꢂ  
Bꢌꢍꢊꢎꢃ  
ꢉꢊ  
ꢄꢅꢆꢇꢈꢉꢆ  
220µF  
SENSE  
GATE  
ꢀꢁꢂꢃ  
ꢄꢅꢆꢇꢈꢉꢆ  
1020k  
20k  
IN  
SOURCE  
UVL  
STATUS  
24V  
ꢋꢌꢍRꢎꢃ  
ꢄꢅꢆꢇꢈꢉꢆ  
1.65k  
4.22k  
32.4k  
LTC4231  
UVH  
ꢉ
ꢏꢌꢁꢈ  
ꢐꢁꢇꢈꢉꢆ  
OV  
SHDN  
ꢔꢄꢕꢑ ꢂꢁꢅꢑꢖ  
ꢑꢅꢒꢓꢇꢈꢉꢆ  
GNDSW  
TIMER  
GND  
180nF  
4231 TA01a  
Rev. B  
1
Document Feedback  
For more information www.analog.com  
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