參數(shù)資料
型號: LT6109HMS-1#TRPBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 模擬信號調(diào)理
英文描述: SPECIALTY ANALOG CIRCUIT, PDSO10
封裝: LEAD FREE, PLASTIC, MSOP-10
文件頁數(shù): 2/28頁
文件大?。?/td> 370K
代理商: LT6109HMS-1#TRPBF
LT6109-1/LT6109-2
10
610912f
BLOCK DIAGRAMS
Figure 2. LT6109-2 Block Diagram (Comparators with the Same Polarity)
APPLICATIONS INFORMATION
The LT6109 high side current sense amplifier provides
accurate monitoring of currents through an external sense
resistor. The sensed voltage is amplified by an external
resistor-set gain and level shifted from the positive power
supply to a ground-referred output.
TheLT6109comparatorshaveathresholdsetwithabuilt-in
400mV precision reference and have 10mV of hysteresis.
The open-drain outputs can be easily used to level shift
to digital supplies.
Amplifier Theory of Operation
An internal sense amplifier loop forces SENSEHI to have
the same potential as SENSELO. Connecting an external
resistor, RIN, between SENSEHI and V+ forces a potential,
VSENSE, across RIN that is the voltage appearing across
RSENSE. A corresponding current, IOUTA, equal to VSENSE/
RIN, will flow through RIN. The high impedance inputs of
the sense amplifier do not load this current, so it will flow
through an internal MOSFET to the output pin, OUTA.
100
OUTA
+
+
9
10
1
8
INC2
7
INC1
V+
V
610912 F02
6
V+
V
V+
3k
V+
3k
SENSEHI
LT6109-2
SENSELO
200nA
RESET
OVERCURRENT FLAG
2
EN/RST
3
OUTC2
4
OUTC1
34V
6V
ENABLE AND
RESET TIMING
+
V
V+
5
400mV
REFERENCE
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