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LT6109IMS-2#TRPBF

更新时间： 2024-11-11 19:21:31
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凌特 - Linear /
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LT6109IMS-2#TRPBF 数据手册

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LT6109-1/LT6109-2  
High Side Current Sense  
Amplifier with Reference  
and Comparators  
FEATURES  
DESCRIPTION  
The LT®6109 is a complete high side current sense device  
that incorporates a precision current sense amplifier, an  
integrated voltage reference and two comparators. Two  
versions of the LT6109 are available. The LT6109-1 has  
the comparators connected in opposing polarity and the  
LT6109-2hasthecomparatorsconnectedinthesamepolar-  
ity.Inaddition,thecurrentsenseamplifierandcomparator  
inputs and outputs are directly accessible. The amplifier  
gainandcomparatortrippointsareconfiguredbyexternal  
resistors. The open-drain comparator outputs allows for  
easy interface to other system components.  
n
Current Sense Amplifier  
– Fast Step Response: 500ns  
– Low Offset Voltage: 125µV Maximum  
– Low Gain Error: 0.2% Maximum  
n
Internal 400mV Precision Reference  
n
Internal Latching Comparators with Reset  
– Fast Response Time: 500ns  
– Total Threshold Error: 1.25% Maximum  
– Two Comparator Polarity Options  
n
Wide Supply Range: 2.7V to 60V  
n
Supply Current: 550µA  
Low Shutdown Current: 5µA Maximum  
Specified for –40°C to 125°C Temperature Range  
Available in 10-Lead MSOP Package  
n
The overall propagation delay of the LT6109 is typically  
only 1.4µs, allowing for quick reaction to overcurrent  
and undercurrent conditions. The 1MHz bandwidth al-  
lows the LT6109 to be used for error detection in critical  
applications such as motor control. The high threshold  
accuracy of the comparators, combined with the ability to  
latch both comparators, ensures the LT6109 can capture  
high speed events.  
n
n
APPLICATIONS  
n
Overcurrent, Undercurrent and Fault Detection  
n
Current Shunt Measurement  
n
Battery Monitoring  
Motor Control  
Automotive Monitoring and Control  
Remote Sensing  
Industrial Control  
The LT6109 is fully specified for operation from –40°C to  
125°C,makingitsuitableforindustrialandautomotiveap-  
plications.TheLT6109isavailableinasmall10-leadMSOP.  
L, LT, LTC, LTM, TimerBlox, Linear Technology and the Linear logo are registered trademarks  
of Linear Technology Corporation. All other trademarks are the property of their respective  
owners.  
n
n
n
n
TYPICAL APPLICATION  
Circuit Fault Protection with Latching Load Disconnect and Early Warning Indication  
Response to Overcurrent Event  
0.1Ω  
IRF9640  
12V  
TO LOAD  
V
LOAD  
0.1µF  
6.2V*  
10V/DIV  
0V  
100Ω  
1k  
3.3V  
SENSEHI SENSELO  
+
V
V
OUTA  
OUT  
I
10k 1.62k 100k  
LOAD  
LT6109-2  
6.04k  
2.37k  
200mA/DIV  
0mA  
RESET  
EN/RST  
INC2  
V
OUTC1  
5V/DIV  
1k  
100mA WARNING  
250mA DISCONNECT  
100mA WARNING  
OUTC2  
OUTC1  
0V  
0V  
250mA DISCONNECT  
V
OUTC2  
5V/DIV  
2N2700  
INC1  
–
V
1.6k  
610912 TA01a  
610912 TA01b  
5µs/DIV  
*CMH25234B  
610912fa  
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