20IMX4-12-8 Datasheet, PDF (10/12 Pages) Power-One – IMX4 Series Data Sheet 4 Watt DC-DC Converters

IMX4 Series Data Sheet
®
4 Watt DC-DC Converters
Immunity to Environmental Conditions
Table 9: Mechanical and climatic stress
Test Method
Ca Damp heat
steady state
Ea Shock
(half-sinusoidal)
Eb Bump
(half-sinusoidal)
Fc Vibration
(sinusoidal)
Fh Vibration,
broad-band
random
(digital control)
Kb Salt mist, cyclic
(sodium chloride
NaCl solution)
Standard
IEC/EN 60068-2-78
MIL-STD-810D section 507.2
IEC/EN 60068-2-27 ¹
MIL-STD-810D section 516.3
IEC/EN 60068-2-29
MIL-STD-810D section 516.3
IEC/EN 60068-2-6
IEC/EN 60068-2-64
IEC/EN 60068-2-52
Test conditions
Temperature:
Relative humidity:
Duration:
40 ^±2 °C
93 ^+2/-3 %
56 days
Acceleration amplitude:
Bump duration:
Number of bumps:
100 g_n = 981 m/s²
6 ms
18 (3 each direction)
Acceleration amplitude:
Bump duration:
Number of bumps:
40 g_n = 392 m/s²
6 ms
6000 (1000 each direction)
Acceleration amplitude:
Frequency (1 Oct/min):
Test duration:
0.35 mm (10 to 60 Hz)
5 g_n = 49 m/s² (60 to 2000 Hz)
10 to 2000 Hz
7.5 h (2.5 h each axis)
Acceleration spectral density:
Frequency band:
Acceleration magnitude:
Test duration:
0.05 g _n2/Hz
10 to 500 Hz
4.9 g_{n rms}
3 h (1 h each axis)
Concentration:
Duration:
Storage:
Cycles and storage duration:
5% (30 °C)
2 h per cycle
40 °C, 93% rel. humidity
3 days, 22 h per cycle
1 _{Covers also EN 50155/EN 61373 category 1, class B, body mounted (= chassis of coach)}
Status
Converter
not
operating
Converter
operating
Converter
operating
Converter
operating
Converter
operating
Converter
not
operating
Temperatures
Table 10: Temperature specifications, valid for air pressure of 800 to 1200 hPa (800 to 1200 mbar)
Temperature
Standard (-8)
Unit
Characteristics
Conditions
min
max
T_A Ambient temperature Operational ¹
–40
85
°C
T_C Case temperature
–40
105
T_S Storage temperature
Non operational
–55
105
1 _{See Thermal Considerations}
Failure Rates
Table 11: MTBF
MTBF
40IMX4-05-8 (MIL-HDBK-217F)
40IMX4-1212-8 (Bellcore)
Ground benign
T_C = 40 °C
890 000
3 535 000
Ground fixed
T_C = 40 °C
T_C = 70 °C
440 000
247 000
1 768 000
917 000
Ground mobile
T_C = 50 °C
362 000
476 000
Unit
h
BCD20006-G Rev AC, 06-Jul-2012
Page 10 of 12
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