參數(shù)資料
型號(hào)： MAX471
廠商： Maxim Integrated Products, Inc.
英文描述： Precision, High-Side Current-Sense Amplifiers
中文描述： 高精度、高邊電流檢測(cè)放大器
文件頁(yè)數(shù)： 1/12頁(yè)
文件大?。?/td> 120K
代理商： MAX471
_______________General Desc ription
The MAX471/MAX472 are complete, bidirectional, high-
side current-sense amplifiers for portable PCs, tele-
phones, and other systems where battery/DC
power-line monitoring is critical. High-side power-line
monitoring is especially useful in battery-powered sys-
tems, since it does not interfere with the ground paths
of the battery chargers or monitors often found in
“smart” batteries.
The MAX471 has an internal 35m
current-sense resis-
tor and measures battery currents up to ±3A. For appli-
cations requiring higher current or increased flexibility,
the MAX472 functions with external sense and gain-set-
ting resistors. Both devices have a current output that
can be converted to a ground-referred voltage with a
single resistor, allowing a wide range of battery volt-
ages and currents.
An open-collector SIGN output indicates current-flow
direction, so the user can monitor whether a battery is
being charged or discharged. Both devices operate
from 3V to 36V, draw less than 100μA over tempera-
ture, and include a 18μA max shutdown mode.
________________________Applic ations
Portable PCs:
Notebooks/Subnotebooks/Palmtops
Smart Battery Packs
Cellular Phones
Portable Phones
Portable Test/Measurement Systems
Battery-Operated Systems
Energy Management Systems
____________________________Features
o
Complete High-Side Current Sensing
o
Precision Internal Sense Resistor (MAX471)
o
2% Accuracy Over Temperature
o
Monitors Both Charge and Discharge
o
3A Sense Capability with Internal Sense Resistor
(MAX471)
o
Higher Current-Sense Capability with External
Sense Resistor (MAX472)
o
100μA Max Supply Current
o
18μA Max Shutdown Mode
o
3V to 36V Supply Operation
o
8-Pin DIP/SO Packages
______________Ordering Information
PART
MAX471
CPA
MAX471CSA
MAX471EPA
-40°C to +85°C
MAX471ESA
-40°C to +85°C
MAX472
CPA
0°C to +70°C
MAX472CSA
0°C to +70°C
MAX472EPA
-40°C to +85°C
MAX472ESA
-40°C to +85°C
M
Prec ision, High-S ide
Current-S ense Amplifiers
________________________________________________________________ Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
1
1
2
3
4
8
7
6
5
OUT
RS-
RS-
SIGN
GND
RS+
RS+
SHDN
MAX471
DIP/SO
TOP VIEW
_________________Pin Configurations
MAX471
RS+
RS+
RS-
RS-
SIGN
OUT
GND
SHDN
3V
TO
36V
100k
I
LOAD
2000
2k
I
LOAD
TO
LOAD or CHARGER
LOGIC
SUPPLY
DISCHARGE/CHARGE
V
OUT
(1V/A)
__________Typic al Operating Circ uit
19-0335; Rev 2; 12/96
0°C to +70°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
MAX472 Pin Configuration continued on last page.
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