C1

POWER

SWITCH

INDUCTIVE

LOAD

24V

+IN

-IN

+

-

Preamplifier

Output Buffer

Gain = K2

A1

A2

Gain = 10

OFFSET

Internal

Resistor

100 k:

OUT

Level

shift

1

5

3

4

7

8

C1

POWER

SWITCH

INDUCTIVE

LOAD

24V

+IN

-IN

+

-

Preamplifier

Output Buffer

Gain = K2

A1

A2

Gain = 10

OFFSET

Internal

Resistor

100 k:

OUT

Level

shift

1

5

3

4

7

8

LMP8602, LMP8602Q, LMP8603, LMP8603Q

SNOSB36D – JULY 2009 – REVISED MARCH 2013

www.ti.com

Figure 51. Low Side Current Sensing Application with Large Common Mode Transients

HIGH SIDE CURRENT SENSING APPLICATION WITH NEGATIVE COMMON MODE TRANSIENTS

Figure 52 illustrates the application of the LMP8602/LMP8603 in a high side sensing application. This application

is similar to the low side sensing discussed above, except in this application the common mode voltage on the

shunt drops below ground when the driver is switched off. Because the common mode voltage range of the

LMP8602/LMP8603 extends below the negative rail, the LMP8602/LMP8603 is also very well suited for this

application.

Figure 52. High Side Current Sensing Application with Negative Common Mode Transients

22

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