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LTC4380

更新时间： 2024-11-12 02:52:11
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
22页 1378K
描述
100V UV/OV and Reverse Protection Controller with Bidirectional Circuit Breaker

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LTC4380 数据手册

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LTC4368  
100V UV/OV and Reverse Protection  
Controller with Bidirectional Circuit Breaker  
FEATURES  
DESCRIPTION  
The LTC®4368 protects applications from power supply  
voltages that may be too high, too low, or even negative  
and from overcurrent faults in both forward and reverse  
directions. The LTC4368 controls the gate voltage of a pair  
of external N-channel MOSFETs to ensure that the load  
is connected to the input supply only when there are no  
voltage or current faults.  
n
Wide Operating Voltage Range: 2.5V to 60V  
n
Overvoltage Protection to 100V  
n
Reverse Supply Protection to –40V  
n
Bidirectional Electronic Circuit Breaker:  
n
+50mV Forward Sense Threshold  
n
–50mV Reverse (LTC4368-1)  
n
–3mV Reverse (LTC4368-2)  
n
Adjustable 1.5% Undervoltage and Overvoltage  
Two comparator inputs allow configuration of the over-  
voltage (OV) and undervoltage (UV) set points using an  
external resistive divider. A current sense resistor sets the  
forward and reverse circuit breaker current thresholds.  
After a forward current fault, the LTC4368 will either latch-  
off power, or retry after a user adjustable delay. After a  
reverse current fault, the LTC4368 waits for the output to  
fall 100mV below the input to reconnect power to the load.  
Thresholds  
n
Low Operating Current: 80µA  
n
Low Shutdown Current: 5µA  
n
Controls Back-to-Back N-Channel MOSFETs  
n
Blocks 50Hz and 60Hz AC Power  
Hot Swappable Supply Input  
n
n
Pin-Selectable Overcurrent Auto-Retry Timer or Latchoff  
n
10-Pin MSOP and 3mm × 3mm DFN Packages  
The LTC4368 has a 32ms turn-on delay that debounces  
live supply input connections and blocks 50Hz and 60Hz  
AC power. UV/OV faults also trigger the 32ms recovery  
delay before the external MOSFETs are turned back on.  
All registered trademarks and trademarks are the property of their respective owners.  
n
AEC-Q100 Qualified for Automotive Applications  
APPLICATIONS  
n
Reverse Battery Protection  
n
Portable Instrumentation  
n
Automotive and Industrial Surge Protection  
Energy Storage Systems  
n
TYPICAL APPLICATION  
Load Protected from Reverse and Overvoltage at VIN  
24V Application with 10A Circuit Breaker  
+50mV  
V
OUT  
–40V TO 100V  
0.005Ω  
–3mV  
7V TO 36V  
ꢀꢁ ꢂ ꢃꢄꢁ  
ꢅꢁ ꢂ ꢆꢁ  
SiR870  
SiR870  
V
I
IN  
OUT  
ꢀꢁꢂꢃ  
ꢄꢂꢃꢅꢆꢇꢃ  
24V  
–0.6A TO 10A  
+
INRUSH  
CONTROL  
ꢀ
ꢀꢁ  
100µF  
22k  
ꢀꢁꢂꢃꢄ ꢅꢃꢆꢄꢇꢅ  
3.3nF  
SENSE  
V
OUT  
GATE  
V
ꢀꢁꢂ  
IN  
ꢀ
ꢀ
ꢀꢁꢂ  
ꢀꢁꢂ  
464k  
1500k  
121k  
FAULT  
SHDN  
UV  
ꢀꢁꢂꢃ  
ꢄꢂꢃꢅꢆꢇꢃ  
LTC4368-2  
GND  
ꢀ
ꢀꢁ  
1200ms COOLDOWN  
AFTER FORWARD  
OC FAULT  
OV = 36V  
UV = 7V  
OV  
RETRY  
ꢀꢁꢂꢃ ꢄꢅꢆꢇꢈ  
ꢀꢁꢁꢂꢃꢄꢅꢆꢇ  
29.4k  
0.22µF  
4368 TA01a  
Rev. B  
1
Document Feedback  
For more information www.analog.com  
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