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MAX4172

更新时间： 2024-11-27 14:57:35
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亚德诺 - ADI 放大器
页数 文件大小 规格书
9页 1575K
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低成本、高精度、高边电流检测放大器

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MAX4172 数据手册

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MAX4172  
Low-Cost, Precision, High-Side  
Current-Sense Amplifier  
General Description  
Benefits and Features  
● Ideal for High-Side Monitoring  
The MAX4172 is a low-cost, precision, high-side current-  
sense amplifier for portable PCs, telephones, and other  
systems where battery/DC power-line monitoring is critical.  
High-side power-line monitoring is especially useful in  
battery-powered systems, since it does not interfere with  
the battery charger’s ground path. Wide bandwidth and  
ground-sensing capability make the device suitable for  
closed-loop battery-charger and general-purpose current-  
source applications. The 0 to 32V input common-mode  
range is independent of the supply voltage, which ensures  
that current-sense feedback remains viable, even when  
connected to a battery in deep discharge.  
• 3V to 32V Supply Operation  
• ±0.5% Typical Full-Scale Accuracy Over Temperature  
• High Accuracy +2V to +32V Common-Mode  
Range, Functional Down to 0V, Independent of  
Supply Voltage  
• 800kHz Bandwidth [V  
• 200kHz Bandwidth [V  
= 100mV (1C)]  
= 6.25mV (C/16)]  
SENSE  
SENSE  
● Minimizes Board Space Requirements  
• μMAX and SO Packages  
To provide a high level of flexibility, the MAX4172 functions  
with an external sense resistor to set the range of load  
current to be monitored. It has a current output that can  
be converted to a ground-referred voltage with a single  
resistor, accommodating a wide range of battery voltages  
and currents.  
Ordering Information  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +105°C  
PIN-PACKAGE  
8 SO  
MAX4172ESA+  
MAX4172EUA+  
MAX4172GUA+  
8 μMAX  
8 µMAX  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
An open-collector power-good output (PG) indicates  
when the supply voltage reaches an adequate level  
to guarantee proper operation of the current-sense  
amplifier. The MAX4172 operates with a 3.0V to 32V  
supply voltage, and is available in a space-saving, 8-pin  
Typical Operating Circuit  
®
μMAX or SO package.  
UNREGULATED  
DC SUPPLY  
3V TO 32V  
R
50mΩ  
SENSE  
Applications  
0 TO 32V  
LOW-COST  
SWITCHING  
REGULATOR  
2A  
● Portable PCs: Notebooks/Subnotebooks/Palmtops  
● Battery-Powered/Portable Equipment  
● Closed-Loop Battery Chargers/Current Sources  
● Smart-Battery Packs  
● Portable/Cellular Phones  
● Portable Test/Measurement Systems  
● Energy Management Systems  
V
ANALOG OR  
LOGIC SUPPLY  
SENSE  
100kΩ  
RS+  
V+  
RS-  
PG  
POWER GOOD  
LOAD/  
BATTERY  
MAX4172  
I
V
=
Pin Configuration  
OUT  
OUT  
/ 100Ω  
SENSE  
GND  
FEEDBACK LOOP  
= 500mV/A  
TOP VIEW  
+
V
OUT  
8
7
6
5
1
2
3
4
V+  
RS+  
RS-  
R
1kΩ  
OUT  
PG  
MAX4172  
µMAX/SO  
OUT  
GND  
N.C.  
N.C.  
LOW-COST BATTERY CHARGER/CURRENT SOURCE  
μMAX is a registered trademark of Maxim Integrated Products, Inc.  
19-1184; Rev 5; 12/20  
1234567...9

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