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Sensor Based Thermal Specification Design Guidance
58
Thermal/Mechanical Specifications and Design Guidelines
7.6
Thermal Solution Characterization
is early engineering data on the RCBF7-1156 (DHA-A) thermal solution as a
reference for the development of thermal solutions and the fan speed control
algorithm.
Notes:
1.
The ambient temperature is measured at the inlet to the processor thermal solution
2.
This column can be expressed as a function of T
AMBIENT
by the following equation:
Ψ
CA
= 0.29 + (45.1 - T
AMBIENT
) x 0.0181
3.
This column can be expressed as a function of T
AMBIENT
by the following equation:
Ψ
CA
= 0.29 + (45.1 - T
AMBIENT
) x 0.0105
4.
This table is provided as a reference please consult the product specification for current values.
5.
Based on the testing performed a curve was fit to the data in the form
Psi_ca = a x RPM
3
+b x RPM
2
+c x RPM + d, where:
a = -1.53 E-11, b = 1.41 E-07, c = -0.00048, d = 0.925782
6.
Full Speed of 3150 RPM the DHA-A thermal solution delivers a
Ψ
CA
= 0.335 °C /W based on preliminary
testing.
7.
Minimum speed is limited to 1000 RPM to ensure cooling of other system components
§
Table 7-1.
Thermal Solution Performance above T
CONTROL
T
AMBIENT
1
Ψ
CA
at
DTS = T
CONTROL
2
RPM for
Ψ
CA
at
DTS = T
CONTROL
Ψ
CA
at
DTS = -1
3
RPM for
Ψ
CA
at
DTS = -1
45.1
0.290
N/A
0.290
N/A
44.0
0.310
N/A
0.301
N/A
43.0
0.328
N/A
0.312
N/A
42.0
0.346
2950
0.322
N/A
41.0
0.364
2600
0.333
N/A
40.0
0.383
2300
0.343
3150
39.0
0.401
2100
0.354
2750
38.0
0.419
1900
0.364
2600
37.0
0.437
1750
0.375
2400
36.0
0.455
1650
0.385
2250
35.0
0.473
1500
0.396
2150
34.0
0.491
1400
0.406
2050
33.0
0.510
1350
0.417
1900
32.0
0.528
1200
0.427
1850
31.0
0.546
1150
0.438
1750
30.0
0.564
1050
0.448
1650
29.0
0.582
1000
0.459
1600
28.0
0.600
1000
0.469
1550
27.0
0.618
1000
0.480
1450
26.0
0.637
1000
0.491
1400
25.0
0.655
1000
0.501
1350
24.0
0.673
1000
0.512
1300
23.0
0.691
1000
0.522
1250
22.0
0.709
1000
0.533
1200
21.0
0.727
1000
0.543
1150
20.0
0.746
1000
0.554
1100
Содержание i5-700
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