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MAX4172ESA_12

更新时间： 2024-11-27 01:19:23
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
9页 537K
描述
Low-Cost, Precision, High-Side Current-Sense Amplifier

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MAX4172ESA_12 数据手册

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MAX4172  
Low-Cost, Precision, High-Side  
Current-Sense Amplifier  
_______________General Description  
____________________________Features  
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 criti-  
cal. 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 MAX4172 suitable  
for closed-loop battery-charger and general-purpose cur-  
rent-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.  
o Low-Cost, High-Side Current-Sense Amplifier  
o ±±.ꢀ5 ꢁypical Full-Scale Accuracy ꢂver  
ꢁemperature  
o 3V to 32V Supply ꢂperation  
o High Accuracy +2V to +32V Common-Mode  
Range, Functional Down to ±V, Independent of  
Supply Voltage  
o 8±±kHz Bandwidth [V  
= 1±±mV (1C)]  
= 6.2ꢀmV (C/16)]  
SENSE  
SENSE  
2±±kHz Bandwidth [V  
o Available in Space-Saving µMAX and Sꢂ  
To provide a high level of flexibility, the MAX4172 func-  
tions 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 sin-  
gle resistor, accommodating a wide range of battery volt-  
ages and currents.  
Packages  
______________Ordering Information  
An open-collector power-good output (PG) indicates  
when the supply voltage reaches an adequate level to  
guarantee proper operation of the current-sense amplifi-  
er. The MAX4172 operates with a 3.0V to 32V supply  
voltage, and is available in a space-saving, 8-pin µMAX®  
or SO package.  
PARꢁ  
ꢁEMP. RANGE  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
8 SO  
MAX4172ESA+  
MAX4172EUA+  
8 µMAX  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
________________________Applications  
Portable PCs: Notebooks/Subnotebooks/Palmtops  
Battery-Powered/Portable Equipment  
Closed-Loop Battery Chargers/Current Sources  
Smart-Battery Packs  
__________Typical Operating Circuit  
UNREGULATED  
DC SUPPLY  
3V TO 32V  
R
SENSE  
50mΩ  
0 TO 32V  
LOW-COST  
SWITCHING  
REGULATOR  
2A  
Portable/Cellular Phones  
Portable Test/Measurement Systems  
Energy Management Systems  
V
ANALOG OR  
LOGIC SUPPLY  
SENSE  
100kΩ  
RS+  
V+  
RS-  
PG  
__________________Pin Configuration  
POWER GOOD  
LOAD/  
BATTERY  
MAX4172  
TOP VIEW  
+
I
V
=
OUT  
OUT  
8
7
6
5
1
2
3
4
V+  
RS+  
RS-  
/ 100Ω  
SENSE  
GND  
PG  
MAX4172  
FEEDBACK LOOP  
= 500mV/A  
V
OUT  
OUT  
GND  
N.C.  
N.C.  
R
OUT  
1kΩ  
µMAX/Sꢂ  
LOW-COST BATTERY CHARGER/CURRENT SOURCE  
µMAX is a registered trademark of Maxim Integrated Products, Inc.  
For pricing, delivery, and ordering information, please contact Maxim Direct  
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.  
19-1184; Rev 2; 10/12  
1234567...9

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