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PDF MP8110 Data sheet ( Hoja de datos )
| Número de pieza | MP8110 | |
| Descripción | Precision High-Side Current-Sense Amplifier | |
| Fabricantes | MPS | |
| Logotipo |  |
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The Future of Analog IC Technology
DESCRIPTION
The MP8110 is a low-cost, precision, high-side
current-sense amplifier. This device operates
from a single 2.5V to 40V supply and typically
consumes 12µA. It is ideal for today’s notebook
computers, cell phones and other systems
where battery/DC current monitoring is critical.
High-side current monitoring is especially useful
in battery-powered systems since it does not
interfere with the ground path of the battery
charger. The input common-mode range of
1.4V to 40V is independent of the supply
voltage and ensures that the current-sense
feedback remains viable even when connected
to a 2-cell battery pack in deep discharge.
This device is available in 8-pin SOIC and
MSOP packages.
MP8110
Precision High-Side
Current-Sense Amplifier
FEATURES
• Low-Cost, Compact Current-Sense Solution
• 12µA Typical Supply Current
• 2.5V to 40V Operating Supply Voltage
• 1.4V to 40V Input Common Mode Range
• 3µA Typical Shutdown Current
• 400µV Input Offset Voltage
• High Current Sensing Capability
• Integrated Buffer Amplifier
• Available in 8-Pin SOIC and MSOP packages,
APPLICATIONS
• Portable PCs
• PDA’s
• Smart Battery Packs
• Cell Phones
• Portable Test/Measurement Systems
• Battery-Operated Systems
• Energy Management Systems
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
C5
0.1uF
+ 10uF
SHUTDOWN
ON OFF
RG1
RG2
VCC
MP8110
SHDN
OUT2
GND
OUT1
ILOAD
CGS
100pF
COUT
Opt.
MP8110 Rev. 0.9
9/21/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
1
1 page  
MP8110 – PRECISION HIGH-SIDE CURRENT-SENSE AMPLIFIER
SHDN
ILOAD
NC
RG1
RG1
IRG1
RS VRS
RG2
RG2
BIAS +
ENABLE
--
BUFFER
+
--
+ SENSE
AMPLIFIER
To Load
Figure 1—Functional Block Diagram
APPLICATION INFORMATION
COMPONENT SELECTION
Table 1—Suggested Component Values (refer to Typical Circuit on page 1)
Full-Scale Load
Current, ISENSE (A)
0.1
Current Sense
Resistor (mΩ)
500
Gain Setting Resistor
(kΩ) (RG1 = RG2)
2
RGS
(kΩ)
20
Gain
10
1 50
5 10
2 20 10
2 20 10
10 5
2 20 10
The value of VOUT1 can be obtained with the equation:
VOUT1 =
ILOAD
× RS × RGS
R G1
= ILOAD × RS
× Gain
Where RG1 is the sense resistor and ILOAD is the load current.
OUT2
VCC
GND
OUT1 VOUT1
IRGS
RGS
MP8110 Rev. 0.9
9/21/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
5
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MP8110.PDF ] | |
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