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Power Management
3.0
Power Management
3.1
Power Measurement Support
The development kit has power measurement for each IO circuit and device validation.
Power measurement resistors are provided to measure the power on many of the
subsystems.
Table 8.
Power Measurement Resistors
Feature
Tolerance
Value
Watt
Package Size (inch)
Note:
Intel recommends that larger (~10 m ) resistors be stuffed for greater accuracy.
Power on a particular subsystem is calculated using the following formula:
2
Equation 1. P = V
/R
R = value of the sense resistor (typically 0.01
V = the voltage difference measured across the sense resistor.
Use a high precision digital multi-meter tool such as the Agilent 34401A digital multi-
meter.
Refer to
Table 9
34401A) versus a precision, digital multi-meter (Fluke 79).
January 2012
Document Number: 324213-002
Table 8
lists the measurement resistors.
Resistor-1
1%
10 m
0.5W
0805
for a comparison of a high-precision, digital multi-meter (Agilent
®
Intel
Atom™ Processor E660 with Intel
Resistor-2
1%
5%
10 m
2 m
0.75W
2W
1206
2512
)
®
Platform Controller Hub EG20T Development Kit
Resistor-3
User Manual
31
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