G

0.6-V

Reference

Comparator

OUT

CMPIN

CMP

OUT

RESET

V

IN-

V

IN+

INA200 (G = 20)

INA201 (G = 50)

INA202 (G = 100)

GND

2

3

4

6

5

7

8

1

Shunt

Option 3

Shunt

Option 1

R

3

R

4

Supply

To V

IN-

To V

IN+

To V

IN-

To V

IN+

R

1

R

2

From

Shunt Option

1, 2, or 3

RESET

4.5 V to 5.5 V

Q

1

2N3904

Shunt

Option 2

Load

To V

IN-

To V

IN+

V

S

Copyright © 2017, Texas Instruments Incorporated

16

INA200, INA201, INA202

SBOS374E – NOVEMBER 2006 – REVISED SEPTEMBER 2017

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Product Folder Links: INA200 INA201 INA202

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Copyright © 2006–2017, Texas Instruments Incorporated

(1)

Q1 cascodes the comparator output to drive a high-side FET (the 2N3904) shown is good up to 60 V. The shunt can

be located in any one of the three locations shown. The latching capability must be used in shutdown applications to

prevent oscillation at the trip point.

Figure 29. High-Side Switch Overcurrent Shutdown