Thermal Stress Test
There are three types of stress tests in general to evaluate the reliability or output stability in power supplies, which are thermal stress tests, voltage stress tests, and current stress tests. In order to unravel its mystery, this article will introduce about thermal stress testing. Additionally, other than specific customer demands, FSP conducts tests on our products based on the testing conditions and results of the thermal stress tests and the key component items listed below:
Device | Type | Category | Derating Thermal |
Capacitor | – | – | 90% |
MOSFET | – | Main Switch | 85% |
Small Signal | |||
Diode | – | – | |
IC | – | – | |
Photo Coupler | – | – | |
Inductor | Transformer | – | 85% |
Choke | – | 90% |
The reliability and output stability are always important in choosing a power supply. However, most manufacturers are unable to provide reliable data as proof that their products have an advantage over others in reliability and output stability, creating a gray area for many unorthodox manufacturers to have control over the choice of components for their power supplies. Most consumers would not always run computer equipment with the power supply on full load, nor use it beyond the ambient temperature exceeding 40 or even 50 degrees (heat-resistance setting of high-end products). Therefore, unorthodox manufacturers usually use low quality parts, or use them beyond the rated conditions of 100%. We mentioned that most consumers wouldn’t use power supplies under a full load, and the products usually wouldn’t break down within the year, which allowed the unorthodox manufacturers room to maneuver. When issues arise after a period of time or the warranty has expired, the consumers also just take it as bad luck without pursuing further.
In addition to the testing standards of key components, our testing conditions are also stringent. The components and parts of our products are required to be tested at the maximum heat-resistant conditions and under different loads as the conditions for passing safety specification certifications. Below are the internal testing conditions of our 80 Plus Gold 650W product:
² AC Input: 90Vac/115Vac/230Vac/264Vac
² Frequency: 47Hz/60Hz/50Hz/63Hz
² Ambient Temperature: 40℃
Loading | +5V | +12V | -12V | +3.3V | +5Vsb |
---|---|---|---|---|---|
FL1 | 20A | 42.85A | 0.3A | 6.05A | 2.5A |
FL2 | 10.8A | 43.9A | 0.3A | 20A | 0A |
FL3 | 0.1A | 54.16A | 0A | 0A | 0A |
SB Mode | * | * | * | * | 2.5A |
After all, the input and output conditions are set, it is internally specified by the company to use the fan reported with the least cooling capabilities for testing. If the worst one could satisfy company standards, then the best one would definitely excel in test results. The fan setting of this same 650W gold product is as follows:
Fan Type | Input Voltage | Load | Fan Voltage(Vdc) |
---|---|---|---|
FAN, MIDDLE,0.3A,12V,120*25,27dB,
55-68cfm,1800rpm,SLEEVE,2PIN, 150mm,CONNECT,D12SM-12,YATE LOON/NICE FULL |
90Vac/47HZ | FL1 | 11.44 |
FL2 | 11.44 | ||
FL3 | 11.44 | ||
115Vac/60Hz | FL1 | 11.44 | |
FL2 | 11.44 | ||
FL3 | 11.44 | ||
230Vac/50Hz | FL1 | 11.44 | |
FL2 | 11.44 | ||
FL3 | 11.44 | ||
264Vac/63Hz | FL1 | 11.44 | |
FL2 | 11.44 | ||
FL3 | 11.44 |
The following tables are all test results under the conditions set by the FSP Group. All testing items conform to internal standards. We also specify that all new models from R&D must go through this stage for the product to proceed to test production. Only if the test production is without issues, may the product go into mass production.
(UNIT:℃)
Location | SPEC | FL1 | Result | |||||||
90V | Derating (%) | 115V | Derating (%) | 230V | Derating (%) | 264V | Derating (%) | |||
QS203 | 175 | 77.99 | 44.6 | 77.41 | 44.2 | 77.3 | 44.2 | 77.26 | 44.1 | Pass |
QS201 | 175 | 87.51 | 50 | 86.5 | 49.4 | 86.24 | 49.3 | 85.97 | 49.1 | Pass |
QS103 | 175 | 63.66 | 36.4 | 62.68 | 35.8 | 62.23 | 35.6 | 62.21 | 35.5 | Pass |
CS106 | 105 | 64.21 | 61.2 | 63.85 | 60.8 | 63.56 | 60.5 | 63.53 | 60.5 | Pass |
FL1 | 130 | 77.59 | 59.7 | 60.32 | 46.4 | 49.28 | 37.9 | 48.38 | 37.2 | Pass |
FL3 | 130 | 92.86 | 71.4 | 70.85 | 54.5 | 56.33 | 43.3 | 54.95 | 42.3 | Pass |
BD1 | 150 | 93.11 | 62.1 | 80.44 | 53.6 | 62.55 | 41.7 | 60.59 | 40.4 | Pass |
C6 | 105 | 51.19 | 48.8 | 48.73 | 46.4 | 46.11 | 43.9 | 45.47 | 43.3 | Pass |
L1 | 130 | 107.93 | 83 | 89.45 | 68.8 | 67.99 | 52.3 | 61.32 | 47.2 | Pass |
Q201 | 150 | 79.39 | 52.9 | 71.7 | 47.8 | 65.54 | 43.7 | 65.39 | 43.6 | Pass |
Q202 | 150 | 72.11 | 48.1 | 65.43 | 43.6 | 60.07 | 40 | 59.98 | 40 | Pass |
D6 | 175 | 73.18 | 41.8 | 65.5 | 37.4 | 57.97 | 33.1 | 57.41 | 32.8 | Pass |
Q1 | 150 | 85.02 | 56.7 | 70.03 | 46.7 | 57.85 | 38.6 | 57.26 | 38.2 | Pass |
L201 | 130 | 75.28 | 57.9 | 71.72 | 55.2 | 68.93 | 53 | 68.48 | 52.7 | Pass |
T3 | 130 | 44.16 | 34 | 43.56 | 33.5 | 43.15 | 33.2 | 43.35 | 33.3 | Pass |
T201 | 130 | 80.97 | 62.3 | 80.1 | 61.6 | 79.7 | 61.3 | 78.98 | 60.8 | Pass |
T101 | 130 | 72.37 | 55.7 | 71.41 | 54.9 | 70.92 | 54.6 | 70.37 | 54.1 | Pass |
LS801 | 130 | 62.76 | 48.3 | 62.34 | 48 | 62.26 | 47.9 | 62.45 | 48 | Pass |
LS802 | 130 | 52.46 | 40.4 | 52.18 | 40.1 | 52.05 | 40 | 52.26 | 40.2 | Pass |
CS202 | 105 | 66.64 | 63.5 | 66.27 | 63.1 | 66.49 | 63.3 | 66.57 | 63.4 | Pass |
CS805 | 105 | 53.19 | 50.7 | 52.8 | 50.3 | 52.81 | 50.3 | 53.06 | 50.5 | Pass |
CS213 | 105 | 47.14 | 44.9 | 46.77 | 44.5 | 46.85 | 44.6 | 47.09 | 44.8 | Pass |
QS805 | 175 | 62.19 | 35.5 | 61.81 | 35.3 | 61.73 | 35.3 | 62.09 | 35.5 | Pass |
QS806 | 175 | 52.54 | 30 | 52.19 | 29.8 | 52.18 | 29.8 | 52.37 | 29.9 | Pass |
QS803 | 175 | 64.34 | 36.8 | 64.01 | 36.6 | 63.89 | 36.5 | 64.2 | 36.7 | Pass |
QS804 | 175 | 61.74 | 35.3 | 61.19 | 35 | 61.32 | 35 | 61.45 | 35.1 | Pass |
IC101 | 125 | 67.15 | 53.7 | 66.45 | 53.2 | 66.18 | 52.9 | 66.3 | 53 | Pass |
IC801 | 150 | 53.59 | 35.7 | 53.25 | 35.5 | 53.23 | 35.5 | 53.42 | 35.6 | Pass |
D2 | 150 | 60.55 | 40.4 | 55.08 | 36.7 | 49.38 | 32.9 | 48.58 | 32.4 | Pass |
LS101 | 130 | 50.76 | 39 | 50.2 | 38.6 | 50.01 | 38.5 | 50.04 | 38.5 | Pass |
LS201 | 130 | 65.48 | 50.4 | 65.1 | 50.1 | 65.05 | 50 | 65.24 | 50.2 | Pass |
R36 | 150 | 84.77 | 56.5 | 69.52 | 46.3 | 53.97 | 36 | 52.35 | 34.9 | Pass |
L2 | 130 | 77.61 | 59.7 | 67.27 | 51.7 | 57.03 | 43.9 | 55.85 | 43 | Pass |
CT201 | 130 | 50.93 | 39.2 | 48.85 | 37.6 | 47.2 | 36.3 | 47.28 | 36.4 | Pass |
AMB | — | 40 | — | 40 | — | 40 | — | 40 | — | — |
Location | SPEC | FL2 | Result | |||||||
90V | Derating (%) | 115V | Derating (%) | 230V | Derating (%) | 264V | Derating (%) | |||
QS203 | 175 | 79.41 | 45.4 | 79.03 | 45.2 | 78.73 | 45 | 78.86 | 45.1 | Pass |
QS201 | 175 | 88.37 | 50.5 | 87.54 | 50 | 87.17 | 49.8 | 87.22 | 49.8 | Pass |
QS103 | 175 | 59.64 | 34.1 | 58.84 | 33.6 | 58.37 | 33.4 | 58.38 | 33.4 | Pass |
CS106 | 105 | 61.44 | 58.5 | 61.02 | 58.1 | 60.86 | 58 | 60.86 | 58 | Pass |
FL1 | 130 | 76.77 | 59.1 | 59.75 | 46 | 48.71 | 37.5 | 48.16 | 37 | Pass |
FL3 | 130 | 92.52 | 71.2 | 70.34 | 54.1 | 56.15 | 43.2 | 54.83 | 42.2 | Pass |
BD1 | 150 | 93.03 | 62 | 80.51 | 53.7 | 62.52 | 41.7 | 60.7 | 40.5 | Pass |
C6 | 105 | 50.95 | 48.5 | 48.62 | 46.3 | 46.06 | 43.9 | 46.07 | 43.9 | Pass |
L1 | 130 | 107.97 | 83.1 | 89.5 | 68.8 | 68.01 | 52.3 | 64.82 | 49.9 | Pass |
Q201 | 150 | 80.11 | 53.4 | 72.34 | 48.2 | 66.01 | 44 | 65.77 | 43.8 | Pass |
Q202 | 150 | 72.65 | 48.4 | 65.95 | 44 | 60.47 | 40.3 | 60.33 | 40.2 | Pass |
D6 | 175 | 73.35 | 41.9 | 65.6 | 37.5 | 58.09 | 33.2 | 57.5 | 32.9 | Pass |
Q1 | 150 | 85.31 | 56.9 | 70.33 | 46.9 | 58.03 | 38.7 | 57.39 | 38.3 | Pass |
L201 | 130 | 75.88 | 58.4 | 72.32 | 55.6 | 69.61 | 53.5 | 69.67 | 53.6 | Pass |
T3 | 130 | 44.05 | 33.9 | 43.5 | 33.5 | 43.19 | 33.2 | 43.24 | 33.3 | Pass |
T201 | 130 | 82.14 | 63.2 | 81.25 | 62.5 | 80.84 | 62.2 | 80.87 | 62.2 | Pass |
T101 | 130 | 63.03 | 48.5 | 62.14 | 47.8 | 61.41 | 47.2 | 61.6 | 47.4 | Pass |
LS801 | 130 | 56.12 | 43.2 | 55.85 | 43 | 55.62 | 42.8 | 55.73 | 42.9 | Pass |
LS802 | 130 | 66.42 | 51.1 | 66.13 | 50.9 | 66.04 | 50.8 | 66.06 | 50.8 | Pass |
CS202 | 105 | 68.07 | 64.8 | 67.94 | 64.7 | 67.92 | 64.7 | 68.03 | 64.8 | Pass |
CS805 | 105 | 59.86 | 57 | 59.65 | 56.8 | 59.55 | 56.7 | 59.63 | 56.8 | Pass |
CS213 | 105 | 47.51 | 45.2 | 47.39 | 45.1 | 47.35 | 45.1 | 47.49 | 45.2 | Pass |
QS805 | 175 | 68.06 | 38.9 | 67.84 | 38.8 | 67.7 | 38.7 | 67.8 | 38.7 | Pass |
QS806 | 175 | 62.14 | 35.5 | 61.9 | 35.4 | 61.79 | 35.3 | 61.95 | 35.4 | Pass |
QS803 | 175 | 63.75 | 36.4 | 63.59 | 36.3 | 63.46 | 36.3 | 63.56 | 36.3 | Pass |
QS804 | 175 | 58.38 | 33.4 | 58.09 | 33.2 | 58 | 33.1 | 58.12 | 33.2 | Pass |
IC101 | 125 | 60.24 | 48.2 | 59.55 | 47.6 | 59.21 | 47.4 | 59.34 | 47.5 | Pass |
ICS801 | 150 | 54.02 | 36 | 53.79 | 35.9 | 53.78 | 35.9 | 53.91 | 35.9 | Pass |
D2 | 150 | 60.45 | 40.3 | 55 | 36.7 | 49.32 | 32.9 | 48.88 | 32.6 | Pass |
LS101 | 130 | 49.03 | 37.7 | 48.69 | 37.5 | 48.44 | 37.3 | 48.52 | 37.3 | Pass |
LS201 | 130 | 67.69 | 52.1 | 67.44 | 51.9 | 67.3 | 51.8 | 67.29 | 51.8 | Pass |
R36 | 150 | 84.79 | 56.5 | 69.72 | 46.5 | 53.95 | 36 | 52.71 | 35.1 | Pass |
L2 | 130 | 77.65 | 59.7 | 67.32 | 51.8 | 56.93 | 43.8 | 56 | 43.1 | Pass |
CT201 | 130 | 51 | 39.2 | 48.91 | 37.6 | 47.2 | 36.3 | 47.22 | 36.3 | Pass |
AMB | — | 40 | — | 40 | — | 40 | — | 40 | — | — |
Location | SPEC | FL3 | Result | |||||||
90V | Derating (%) | 115V | Derating (%) | 230V | Derating (%) | 264V | Derating (%) | |||
QS203 | 175 | 77.13 | 44.1 | 76.79 | 43.9 | 76.67 | 43.8 | 76.84 | 43.9 | Pass |
QS201 | 175 | 85.24 | 48.7 | 84.51 | 48.3 | 84.19 | 48.1 | 84.33 | 48.2 | Pass |
QS103 | 175 | 56.88 | 32.5 | 56.26 | 32.1 | 55.73 | 31.8 | 55.88 | 31.9 | Pass |
CS106 | 105 | 57.92 | 55.2 | 57.54 | 54.8 | 57.4 | 54.7 | 57.51 | 54.8 | Pass |
FL1 | 130 | 71.32 | 54.9 | 57.97 | 44.6 | 47.19 | 36.3 | 46.85 | 36 | Pass |
FL3 | 130 | 86.15 | 66.3 | 68.78 | 52.9 | 54.61 | 42 | 53.84 | 41.4 | Pass |
BD1 | 150 | 91.41 | 60.9 | 79.81 | 53.2 | 61.92 | 41.3 | 60.31 | 40.2 | Pass |
C6 | 105 | 50.78 | 48.4 | 48.52 | 46.2 | 45.97 | 43.8 | 46.05 | 43.9 | Pass |
L1 | 130 | 106.33 | 81.8 | 88.71 | 68.2 | 67.78 | 52.1 | 64.74 | 49.8 | Pass |
Q201 | 150 | 78.58 | 52.4 | 71.33 | 47.6 | 65.26 | 43.5 | 65.13 | 43.4 | Pass |
Q202 | 150 | 71.55 | 47.7 | 65.25 | 43.5 | 60.02 | 40 | 59.86 | 39.9 | Pass |
D6 | 175 | 72.37 | 41.4 | 65.17 | 37.2 | 57.73 | 33 | 57.28 | 32.7 | Pass |
Q1 | 150 | 83.64 | 55.8 | 69.57 | 46.4 | 57.58 | 38.4 | 57.16 | 38.1 | Pass |
L201 | 130 | 74.85 | 57.6 | 71.52 | 55 | 68.74 | 52.9 | 68.95 | 53 | Pass |
T3 | 130 | 43.84 | 33.7 | 43.35 | 33.3 | 42.97 | 33.1 | 43.21 | 33.2 | Pass |
T201 | 130 | 80.35 | 61.8 | 79.64 | 61.3 | 79.06 | 60.8 | 79.56 | 61.2 | Pass |
T101 | 130 | 60.38 | 46.4 | 59.55 | 45.8 | 58.94 | 45.3 | 59.15 | 45.5 | Pass |
LS801 | 130 | 48.3 | 37.2 | 48.02 | 36.9 | 47.91 | 36.9 | 48.01 | 36.9 | Pass |
LS802 | 130 | 47.17 | 36.3 | 47.01 | 36.2 | 46.88 | 36.1 | 47.06 | 36.2 | Pass |
CS202 | 105 | 66.52 | 63.4 | 66.32 | 63.2 | 66.19 | 63 | 66.49 | 63.3 | Pass |
CS805 | 105 | 48.42 | 46.1 | 48.37 | 46.1 | 48.17 | 45.9 | 48.4 | 46.1 | Pass |
CS213 | 105 | 46.76 | 44.5 | 46.7 | 44.5 | 46.52 | 44.3 | 46.74 | 44.5 | Pass |
QS805 | 175 | 49.46 | 28.3 | 49.31 | 28.2 | 49.19 | 28.1 | 49.35 | 28.2 | Pass |
QS806 | 175 | 46.58 | 26.6 | 46.47 | 26.6 | 46.27 | 26.4 | 46.49 | 26.6 | Pass |
QS803 | 175 | 49.06 | 28 | 48.92 | 28 | 48.74 | 27.9 | 48.93 | 28 | Pass |
QS804 | 175 | 48.23 | 27.6 | 48.08 | 27.5 | 47.8 | 27.3 | 48 | 27.4 | Pass |
IC101 | 125 | 54.92 | 43.9 | 54.4 | 43.5 | 54.03 | 43.2 | 54.25 | 43.4 | Pass |
IC801 | 150 | 49.17 | 32.8 | 49.02 | 32.7 | 48.86 | 32.6 | 49.01 | 32.7 | Pass |
D2 | 150 | 59.86 | 39.9 | 54.85 | 36.6 | 49.13 | 32.8 | 48.82 | 32.5 | Pass |
LS101 | 130 | 46.19 | 35.5 | 45.81 | 35.2 | 45.56 | 35 | 45.74 | 35.2 | Pass |
LS201 | 130 | 66.39 | 51.1 | 66.16 | 50.9 | 66 | 50.8 | 66.18 | 50.9 | Pass |
R36 | 150 | 83.47 | 55.6 | 69.2 | 46.1 | 53.74 | 35.8 | 52.59 | 35.1 | Pass |
L2 | 130 | 76.59 | 58.9 | 66.89 | 51.5 | 56.69 | 43.6 | 55.82 | 42.9 | Pass |
CT201 | 130 | 50.53 | 38.9 | 48.6 | 37.4 | 46.93 | 36.1 | 47 | 36.2 | Pass |
AMB | — | 40 | — | 40 | — | 40 | — | 40 | — | — |
Location | SPEC | SB mode | Result | |||
90V | Derating (%) | 264V | Derating (%) | |||
QS203 | 175 | 41.14 | 23.5 | 41.08 | 23.5 | Pass |
QS201 | 175 | 42.77 | 24.4 | 42.72 | 24.4 | Pass |
QS103 | 175 | 48.31 | 27.6 | 48.29 | 27.6 | Pass |
CS106 | 105 | 50.28 | 47.9 | 50.32 | 47.9 | Pass |
FL1 | 130 | 42.83 | 32.9 | 42.8 | 32.9 | Pass |
FL3 | 130 | 43.44 | 33.4 | 43.45 | 33.4 | Pass |
BD1 | 150 | 42.6 | 28.4 | 42.55 | 28.4 | Pass |
C6 | 105 | 41.03 | 39.1 | 41.05 | 39.1 | Pass |
L1 | 130 | 40.42 | 31.1 | 40.44 | 31.1 | Pass |
Q201 | 150 | 40.46 | 27 | 40.46 | 27 | Pass |
Q202 | 150 | 40.41 | 26.9 | 40.43 | 27 | Pass |
D6 | 175 | 40.67 | 23.2 | 40.68 | 23.2 | Pass |
Q1 | 150 | 40.46 | 27 | 40.48 | 27 | Pass |
L201 | 130 | 40.66 | 31.3 | 40.69 | 31.3 | Pass |
T3 | 130 | 40.37 | 31.1 | 40.3 | 31 | Pass |
T201 | 130 | 41.47 | 31.9 | 41.49 | 31.9 | Pass |
T101 | 130 | 60.12 | 46.2 | 60.14 | 46.3 | Pass |
LS801 | 130 | 42.22 | 32.5 | 42.24 | 32.5 | Pass |
LS802 | 130 | 41.3 | 31.8 | 41.29 | 31.8 | Pass |
CS202 | 105 | 41.64 | 39.7 | 41.64 | 39.7 | Pass |
CS805 | 105 | 41.46 | 39.5 | 41.48 | 39.5 | Pass |
CS213 | 105 | 40.96 | 39 | 40.99 | 39 | Pass |
QS805 | 175 | 41.85 | 23.9 | 41.85 | 23.9 | Pass |
QS806 | 175 | 41.53 | 23.7 | 41.56 | 23.7 | Pass |
QS803 | 175 | 41.96 | 24 | 41.98 | 24 | Pass |
QS804 | 175 | 42.35 | 24.2 | 42.36 | 24.2 | Pass |
IC101 | 125 | 58.77 | 47 | 58.83 | 47.1 | Pass |
IC801 | 150 | 41.54 | 27.7 | 41.55 | 27.7 | Pass |
D2 | 150 | 42.43 | 28.3 | 42.45 | 28.3 | Pass |
LS101 | 130 | 47.09 | 36.2 | 47.1 | 36.2 | Pass |
LS201 | 130 | 41.58 | 32 | 41.58 | 32 | Pass |
R36 | 150 | 41.05 | 27.4 | 41.04 | 27.4 | Pass |
L2 | 130 | 40.36 | 31 | 40.37 | 31.1 | Pass |
CT201 | 130 | 40.41 | 31.1 | 40.45 | 31.1 | Pass |
AMB | — | 40 | — | 40 | — | — |
Everyone knows the operating temperature for electric components is, the lower the better, as usually, the operating temperature and lifespan of the component is inversely related to each other. Are you more at ease and safe with FSP products after reading this report? Because most components still have a ways to go from operating temperature to rated derating under different loads, therefore we can be sure of the product’s standard in reliability and output stability. Are you curious of FSP’s testing equipment in our laboratories? What equipment do we have to test new products? Below are some pictures for you to learn about our laboratories.
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FSPについて
FSPテクノロジーは、世界最先端の電源メーカー一員です。1993年成立時から、「サービス、プロフェッショナル、イノベーション」の経営理念を持って、全方面でグリーンエネルギーで解決するメーカーです。