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參數(shù)資料
| 型號： | LT1740-7Z |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 500 W AC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 15/32頁 |
| 文件大?。?/td> | 1000K |
| 代理商： | LT1740-7Z |
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BCD20023 Rev. AA, 3-Sep-2008
Page 22 of 32
www.power-one.com
T Series Data Sheet
500 Watt AC-DC Converters
Table 18: MTBF
Values at specified
Model
Ground benign
Ground fixed
Ground mobile
Unit
case temperature
40°C
70°C
50°C
MTBF 1
LT1701-7
198 000
56 000
26 000
20 000
h
Device hours 2
810 000
1
Calculated in accordance with MIL-HDBK-217E (calculation accord. to edition F would show even better results)
2
Statistical values, based on an average of 4300 working hours per year and in general field use, over 3 years
Table 17 Temperature specifications
–7
Unit
Characteristic
Conditions
min
typ
max
TA
Ambient operational
Io = 0 – Io nom
–25
71
°C
temperature range
Io > Io nom
–25
65
TC
Case temperature range Io = 0 – Io nom
–25
95
at measurement point;
Io > Io nom
–25
90
see Mechanical Data
TS
Storage temperature
–40
100
range (not operating)
TCs
Case temperature,
100
when shut down
Rth CA Thermal resistance
convection
0.5
K/W
case to ambient
cooling
tC
Thermal time constant
1
h
of case
Environmental Conditions
Table 16: Mechanical stress
Test method
Standard
Test conditions
Status
Cab
Damp heat
IEC/EN 60068-2-78
Temperature:
40 ±2 °C
Unit not
steady state
Relative humidity:
93 +2/-3 %
operating
Duration:
56 days
Ea
Shock
IEC/EN 60068-2-27
Acceleration amplitude:
100 gn = 981 m/s2
Unit
(half-sinusoidal)
Bump duration:
6 ms
operating
Number of bumps:
18 (3 each direction)
Eb
Bump
IEC/EN 60068-2-29
Acceleration amplitude:
40 gn = 392 m/s2
Unit
(half-sinusoidal)
Bump duration:
6 ms
operating
Number of bumps:
6000 (1000 in each direction)
Fc
Vibration
IEC/EN 60068-2-6
Acceleration amplitude:
0.21 mm (10 – 60 Hz)
Unit
(sinusoidal)
3 gn = 29.4 m/s2 (60 – 2000 Hz)
operating
Frequency (1 Oct/min):
10 – 2000 Hz
Test duration:
7.5 h (2.5 h each axis)
Fda
Random vibration
IEC/EN 60068-2-35
Acceleration spectral density: 0.05 gn rms
Unit
wide band
DIN 40046 part 23
Frequency band:
20 – 500 Hz
operating
Reproducibility
Acceleration magnitude:
4.9 gn rms
high
Test duration:
3 h (1 h each axis)
Kb
Salt mist, cyclic
IEC/EN 60068-2-52
Concentration:
5% (30 °C)
Unit not
(sodium chloride
Duration:
2 h per cycle
operating
NaCl solution)
Storage:
40 °C, 93% rel. humidity
Storage duration:
22 h per cycle
Number of cycles:
3
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