Power Management

The bidirectional capability of the MAX4081 makes it an

excellent candidate for use in smart battery packs. In

the application diagram (Figure 5), the MAX4081 moni-

tors the charging current into the battery as well as the

discharge current out of the battery. The microcon-

troller stores this information, allowing the system to

query the battery's status as needed to make system

power-management decisions.

76V, High-Side, Current-Sense Amplifiers with

Voltage Output

______________________________________________________________________________________

13

MAX4080

SYSTEM

LOAD

GND

RS-

RS+

OUT

Typical Operating Circuit

Chip Information

TRANSISTOR COUNT: 185

PROCESS: Bipolar

Selector Guide

MAX4081

GND

RS-

RS+

OUT

REF1A

REF1B

SYSTEM

POWER

MANAGEMENT

AND

CHARGER

CIRCUITRY

µC

1.8V

SERIAL

INTERFACE

BATTERY

Figure 5. MAX4081 Used In Smart-Battery Application

PART

GAIN (V/V)

MAX4080FAUA

5

Unidirectional

MAX4080FASA

5

Unidirectional

MAX4080TAUA

20

Unidirectional

MAX4080TASA

20

Unidirectional

MAX4080SAUA

60

Unidirectional

MAX4080SASA

60

Unidirectional

MAX4081FAUA

5

Bidirectional

MAX4081FASA

5

Bidirectional

MAX4081TAUA

20

Bidirectional

MAX4081TASA

20

Bidirectional

MAX4081SAUA

60

Bidirectional

MAX4081SASA

60

Bidirectional