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Typical Applications (continued)
9.2.1.3 Application Curve
9.2.2 TLV3201 and OPA320 Configured as a Fast-Response Output Current Monitor
Figure 32
shows a single-supply current monitor configured as a difference amplifier with a gain of 50. The
OPA320
was chosen for this circuit because of its gain bandwidth (20 MHz), which allows higher speed triggering
and monitoring of the current across the shunt resistor followed by the fast response of the TLV3201.
+
R5
V3 5
50 kW
R4
1 kW
VF2
C1
R
SHUNT
500 pF
100
W
R2
1 kW
IG1
Figure 32. TLV3201 and OPA320 Configured as a Fast-Response Output Current Monitor
Copyright © 2012–2016, Texas Instruments Incorporated
4
3
2
1
0
-1
0
Figure 31. AC-Coupled Comparator Results
+
C3
V2 5
100 pF
R7
U2
1 kW
OPA320
R6
1 kW
C2
100 pF
R1
50 kW
Product Folder Links:
SBOS561B – MARCH 2012 – REVISED DECEMBER 2016
V
IN
V
CM
V
OUT
100m
200m
Time (s)
VF1
VT 2.6
Copyright © 2016, Texas Instruments Incorporated
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TLV3201 TLV3202
TLV3201, TLV3202
V
OUT
U4
TLV3201
+
V1 5
17
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