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INA790B Datasheet(PDF) 28 Page - Texas Instruments

Part # INA790B
Description  INA790x –4V to 110V, Bidirectional, Ultra-Precise, Current Sense Amplifier With Enhanced PWM Rejection and 75A EZShunt™ Technology
PDF  39 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

INA790B Datasheet(HTML) 28 Page - Texas Instruments

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7.2.1.3 Application Curve
Time (Sec)
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
-3
1.3
-1.5
1.4
0
1.5
1.5
1.6
3
1.7
4.5
1.8
6
1.9
7.5
2
9
2.1
10.5
2.2
12
2.3
13.5
2.4
15
2.5
16.5
2.6
18
2.7
19.5
2.8
21
2.9
22.5
3
24
3.1
25.5
3.2
27
3.3
VCM
VOUT
Figure 7-9. Solenoid Drive Current Sense Input and Output Signals
7.2.2 Speaker Enhancements and Diagnostics Using Current Sense Amplifier
CLASS-D audio amplifiers in conjunction with the INA790x provide accurate speaker load current. Speaker
load current is used to determine speaker diagnostics, and can further be expanded to measure key speaker
parameters, such as speaker coil resistance and speaker real-time ambient temperature.
INA790
FB
V
S
OUT
GND
IN+
IN–
–
REF
2.7V to 5.5V
VDD
V
S
2
Figure 7-10. Current Sensing in a CLASS-D Subsystem
7.2.2.1 Design Requirements
Table 7-6. Design Parameters
DESIGN PARAMETER
EXAMPLE VALUE
Common-mode voltage
60V
Power-supply voltage
3.3V
Peak current
±15A
Frequency sweep
20Hz to 20kHz
INA790A, INA790B
SBOSAA6B – MAY 2024 – REVISED JULY 2025
www.ti.com
28
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Copyright © 2025 Texas Instruments Incorporated
Product Folder Links: INA790A INA790B



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