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OrderableDevice 数据表(PDF) 28 Page - Texas Instruments

部件名 OrderableDevice
功能描述  TLV9051 / TLV9052 / TLV9054 5-MHz, 15-V/關s High Slew-Rate, RRIO Op Amp
PDF  76 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

OrderableDevice 数据表(HTML) 28 Page - Texas Instruments

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0
1
2
3
4
5
0
0.2
0.4
0.6
0.8
1
I
LOAD (A)
C219
F
G
R
Gain
1
R
_
_
_
_
OUT MAX
OUT MIN
IN MAX
IN MIN
V
V
Gain
V
V
_
_
SHUNT MAX
SHUNT
LOAD MAX
V
100mV
R
100m
I
1A
:
OUT
LOAD
SHUNT
V
I
R
Gain
u
u
28
TLV9051, TLV9052, TLV9054
SBOS942F – AUGUST 2018 – REVISED JUNE 2019
www.ti.com
Product Folder Links: TLV9051 TLV9052 TLV9054
Submit Documentation Feedback
Copyright © 2018–2019, Texas Instruments Incorporated
Typical Low-Side Current Sense Application (continued)
9.2.2 Detailed Design Procedure
The transfer function of the circuit in Figure 41 is given in Equation 1.
(1)
The load current (ILOAD) produces a voltage drop across the shunt resistor (RSHUNT). The load current is set from
0 A to 1 A. To keep the shunt voltage below 100 mV at maximum load current, the largest shunt resistor is
defined using Equation 2.
(2)
Using Equation 2, RSHUNT equals 100 mΩ. The voltage drop produced by ILOAD and RSHUNT is amplified by the
TLV905x device to produce an output voltage of approximately 0 V to 4.95 V. Equation 3 calculates the gain
required for the TLV905x device to produce the required output voltage.
(3)
Using Equation 3, the required gain equals 49.5 V/V, which is set with the RF and RG resistors. Equation 4 sizes
the RF and RG, resistors to set the gain of the TLV905x device to 49.5 V/V.
(4)
Selecting RF to equal 165 kΩ and RG to equal 3.4 kΩ provides a combination that equals approximately 49.5
V/V. Figure 42 shows the measured transfer function of the circuit shown in Figure 41.
9.2.3 Application Curve
Figure 42. Low-Side, Current-Sense Transfer Function



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