where IOVER and IUNDER
參數(shù)資料
型號: LT6109IMS-1#PBF
廠商: Linear Technology
文件頁數(shù): 9/28頁
文件大小: 0K
描述: IC AMP CURRENT SENSE 10MSOP
標準包裝: 50
類型: 放大器,比較器,參考
應用: 電流感測,電源管理
安裝類型: 表面貼裝
封裝/外殼: 10-TFSOP,10-MSOP(0.118",3.00mm 寬)
供應商設備封裝: 10-MSOP
包裝: 管件
LT6109-1/LT6109-2
17
610912fa
where IOVER and IUNDER are the over and under currents
through the sense resistor which cause the comparators
to trip. IMAX is the maximum current through the sense
resistor.
Depending on the desired maximum amplifier output volt-
age (VMAX) the three output resistors, R1, R2 and R3, can
be configured in two ways. If:
VMAX >
400mV
IOVER
+
400mV –IUNDER R1
( )
IUNDER
IMAX
then use the configuration shown in Figure 3. The desired
trip points and full-scale analog output voltage for the
circuit in Figure 3 can then be achieved using the follow-
ing equations:
APPLICATIONS INFORMATION
R1
=
400mV
IOVER
R2
=
400mV – IUNDER R1
( )
IUNDER
R3
=
VMAX –IMAX R1+ R2
(
)
IMAX
If:
VMAX <
400mV
IOVER
+
400mV –IUNDER R1
( )
IUNDER
IMAX
then use the configuration shown in Figure 11.
Figure 11. Typical Configuration with Alternative ROUT Configuration
OUTA
IOUTA
+
+
V+
C1
SENSEHI
INC2
INC1
R1
610912 F11
V
V+
V
LT6109-1
SENSELO
EN/RST
OUTC2
VRESET
RC
VPULLUP
LOAD
VSUPPLY
VSENSE
RSENSE
UNDERCURRENT
FLAG
OVERCURRENT
FLAG
RIN
+
OUTC1
4
3
2
1
5
+
V
V+
ISENSE =
VSENSE
RSENSE
RC
R2
6
7
8
9
10
R3
CL
VOUT
400mV
REFERENCE
CLC
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