MAX4377FASA datasheet(8/9 Pages) MAXIM

Part #	MAX4377FASA

Description	Single/Dual/Quad High-Side Current-Sense Amplifiers with Internal Gain

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Manufacturer	MAXIM [Maxim Integrated Products]

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

Amplifiers with Internal Gain

8

_______________________________________________________________________________________

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.

RSENSE

VSOURCE

0 TO +28V

+3V TO +28V

RGD

VOUT

IRG1

IRGD

ILOAD

RG1

RG2

RS-

RS+

OUT

GND

TO LOAD BATTERY

VCC

CURRENT

MIRROR

A1

MAX4376

AV = 2, 5,

OR 10

OUT

Figure 1. Functional Diagram

RSENSE

+3V TO +28V

VCC

BATTERY

MAX4377

SYSTEM

AND

CHARGER

OUT2

RS1+

RS1-

OUT1

RS2-

RS2+

Figure 2. Bidirectional Current Monitor

FULL-SCALE LOAD

CURRENT, ILOAD (A)

CURRENT-SENSE

RESISTOR, RSENSE (m

Ω)

GAIN (+V/V)

FULL-SCALE OUTPUT VOLTAGE

(FULL-SCALE VSENSE = 100mV),

VOUT (V)

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

2.0

50

5.0

100

10.0

10

20

2.0

50

5.0

100

10.0

Table 1. Recommended Component Values

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MAX4377FASA Datasheet(PDF) 8 Page - Maxim Integrated Products

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