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MAX4172EUA+

更新时间： 2024-11-25 13:10:31
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美信 - MAXIM 放大器
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19-1184; Rev 0; 12/96  
Lo w -Co s t , P re c is io n , Hig h -S id e  
Cu rre n t -S e n s e Am p lifie r  
MAX4172  
_______________Ge n e ra l De s c rip t io n  
____________________________Fe a t u re s  
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  
a nd g round -s e ns ing c a p a b ility ma ke the MAX4172  
suitable for closed-loop battery-charger and general-  
purpose current-source applications. The 0V to 32V input  
common-mode range is independent of the supply volt-  
age, which ensures that current-sense feedback remains  
viable, even when connected to a battery in deep dis-  
charge.  
♦ Low-Cost, High-Side Current-Sense Amplifier  
♦ ±0.5% Typical Full-Scale Accuracy Over  
Temperature  
♦ 3V to 32V Supply Operation  
♦ 0V to 32V Input Range—Independent of  
Supply Voltage  
♦ 800kHz Bandwidth [V  
= 100mV (1C)]  
SENSE  
200kHz Bandwidth [V  
= 6.25mV (C/16)]  
SENSE  
♦ Available in Space-Saving µMAX and SO  
Packages  
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.  
______________Ord e rin g In fo rm a t io n  
PART  
TEMP. RANGE  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
8 SO  
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.  
MAX4172ESA  
MAX4172EUA  
8 µMAX*  
*Contact factory for availability.  
________________________Ap p lic a t io n s  
Portable PCs: Notebooks/Subnotebooks/Palmtops  
Battery-Powered/Portable Equipment  
Closed-Loop Battery Chargers/Current Sources  
Smart-Battery Packs  
__________Typ ic a l Op e ra t in g Circ u it  
UNREGULATED  
DC SUPPLY  
3V TO 32V  
R
50mΩ  
SENSE  
0V TO 32V  
LOW-COST  
SWITCHING  
REGULATOR  
2A  
V
SENSE  
ANALOG OR  
LOGIC SUPPLY  
Portable/Cellular Phones  
Portable Test/Measurement Systems  
Energy Management Systems  
100k  
RS+  
V+  
RS-  
PG  
__________________P in Co n fig u ra t io n  
POWER GOOD  
LOAD/  
BATTERY  
MAX4172  
I
V
=
SENSE  
TOP VIEW  
OUT  
OUT  
/ 100Ω  
GND  
8
7
6
5
1
2
3
4
V+  
RS+  
RS-  
FEEDBACK LOOP  
= 500mV/A  
V
OUT  
PG  
MAX4172  
R
OUT  
OUT  
GND  
1k  
N.C.  
N.C.  
µMAX/SO  
LOW-COST BATTERY CHARGER/CURRENT SOURCE  
________________________________________________________________ Maxim Integrated Products  
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800  
12345678

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MAX4172EUA+ 替代型号

型号 品牌 替代类型 描述 数据表
MAX4172EUA MAXIM

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