IMX4 Series Data Sheet

4 Watt DC-DC Converters

BCD20006-G Rev AE, 16-Sep-2015

Page 10 of 12

MELCHER

The Power Partners.

Immunity to Environmental Conditions

Table 9: Mechanical and climatic stress

Test Method

Standard

Test conditions

Status

Ca

Damp heat

IEC/EN 60068-2-78

Temperature:

Converter

steady state

MIL-STD-810D section 507.2

Relative humidity:

not

Duration:

56 days

operating

Ea

Shock

Acceleration amplitude:

Converter

(half-sinusoidal)

MIL-STD-810D section 516.3

Bump duration:

6 ms

operating

Number of bumps:

18 (3 each direction)

Eb

Bump

IEC/EN 60068-2-29

Acceleration amplitude:

Converter

(half-sinusoidal)

MIL-STD-810D section 516.3

Bump duration:

6 ms

operating

Number of bumps:

6000 (1000 each direction)

Fc

Vibration

IEC/EN 60068-2-6

Acceleration amplitude:

0.35 mm (10 to 60 Hz)

Converter

(sinusoidal)

operating

Frequency (1 Oct/min):

10 to 2000 Hz

Test duration:

7.5 h (2.5 h each axis)

Fh

Vibration,

IEC/EN 60068-2-64

Converter

broad-band

Frequency band:

10 to 500 Hz

operating

random

Acceleration magnitude:

(digital control)

Test duration:

3 h (1 h each axis)

Kb

Salt mist, cyclic

IEC/EN 60068-2-52

Concentration:

5% (30 °C)

Converter

(sodium chloride

Duration:

2 h per cycle

not

NaCl solution)

Storage:

40 °C, 93% rel. humidity

operating

Cycles and storage duration:

3 days, 22 h per cycle

1

Covers also EN 50155/EN 61373 category 1, class B, body mounted (= chassis of coach)

Failure Rates

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

Ambient temperature

–40

85

°C

Case temperature

–40

105

Storage temperature

Non operational

–55

105

1

See Thermal Considerations

Temperatures

Table 11: MTBF

MTBF

Ground benign

Ground fixed

Ground mobile

Unit

40IMX4-05-8 (MIL-HDBK-217F)

890 000

440 000

247 000

362 000

h

40IMX4-1212-8 (Bellcore)

3 535 000

1 768 000

917 000

476 000