INA381A2IDSGR datasheet(27/44 Pages) TI2

Part #	INA381A2IDSGR

Description	INA381 26-V, High-Speed, Current Sense Amplifier With Integrated Comparator

PDF	44 Pages

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Manufacturer	TI2 [Texas Instruments]

Direct Link	https://www.ti.com

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27 / 44 page

VOUT

RESET

ALERT

IN+

IN±

VS+

GND

CMPIN

CMPREF

10 NŸ

RPULL-UP

G = 200

2.5 NŸ

5 V

INA381

Boost

Converter

12 V

90 V

Gate

Driver

10 NŸ

5 V

Enable, Disable

5 m

INA381

www.ti.com

SBOS848B – DECEMBER 2017 – REVISED OCTOBER 2019

Product Folder Links: INA381

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8.2.2 Solenoid Low-Side Current Sensing

Figure 52. Solenoid Low-Side Current-Sensing

8.2.2.1 Design Requirements

Table 8 lists the parameters of an application design using the INA381 and ALERT functionality to create a low-

side current-sense amplifier with less than a 20-µs system shutdown.

Table 8. Design Parameters

DESIGN PARAMETERS

EXAMPLE VALUE

Power-supply voltage

5 V

Low-side current sensing

VCM = 0 V

Mode of operation

Unidirectional

Maximum current sense threshold

4.0 A

ALERT response time

< 20 µs

ALERT pin mode

Transparent

RSENSE resistor

5 mΩ

Gain option

200 V/V

INA381A2IDSGR Datasheet(PDF) 27 Page - Texas Instruments

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