MP8100 – PRECISION HIGH-SIDE CURRENT-SENSE AMPLIFIER

INITIAL RELEASE – SPECIFICATIONS SUBJECT TO CHANGE

MP8100 Rev. 0.91

www.MonolithicPower.com

4

4/14/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

TM

OPERATION

The MP8100 is a current-sense amplifier with a

wide operating input voltage range of 2.5V to

18V.

BIAS +

ENABLE

SHDN

NC

RG1

BUFFER

MP8100_F01_BD

ERROR

AMPLIFIER

OUT2

RG2

OUT1

VCC

GND

8

7

6

5

1

2

3

4

--

+

--

+

Figure 1—Functional Block Diagram

APPLICATION INFORMATION

COMPONENT SELECTION

Table 1—Suggested Component Values

Full-Scale Load

Current Sense

Resistor (mΩ)

Gain Setting Resistor

(kΩ)

Gain

0.1

500

2

20

10

1

50

2

20

10

5

10

2

20

10

10

5

2

20

10

Gain

R

I

R

R

R

I

V

S

L

1

G

1

OUT

S

L

OUT

×

×

=

×

×

=