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

LMP8601, LMP8601-Q1

www.ti.com

SNOSAR2E – SEPTEMBER 2008 – REVISED MARCH 2013

HIGH SIDE CURRENT SENSING APPLICATION

Figure 42 illustrates the application of the LMP8601/LMP8601Q 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 LMP8601/LMP8601Q extends below the negative rail, the LMP8601/LMP8601Q is also very well

suited for this application.

K2 = 2

Figure 42. High Side Current Sensing Application

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