Single/Dual/Quad, High-Side Current-Sense

Amplifiers with Internal Gain

8

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monitor. This is useful for implementing either smart

battery packs or fuel gauges.

Current Source Circuit

Figure 3 shows a block diagram using the MAX4376

with a switching regulator to make a current source.

0 TO +28V

+3V TO +28V

RGD

RS-

RS+

OUT

GND

TO LOAD BATTERY

CURRENT

MIRROR

A1

MAX4376

OR 10

OUT

Figure 1. Functional Diagram

+3V TO +28V

BATTERY

MAX4377

SYSTEM

AND

CHARGER

OUT2

RS1+

RS1-

OUT1

RS2-

RS2+

Figure 2. Bidirectional Current Monitor

FULL-SCALE LOAD

CURRENT-SENSE

Ω)

GAIN (+V/V)

FULL-SCALE OUTPUT VOLTAGE

0.1

1000

20

2.0

50

5.0

100

10.0

1

100

20

2.0

50

5.0

100

10.0

5

20

20

2.0

50

5.0

100

10.0

10

10

20

2.0

50

5.0

100

10.0

Table 1. Recommended Component Values