AN1149-6 Lumileds Lighting, LLC, AN1149-6 Datasheet - Page 2

• Manufacturer Part Number: AN1149-6
• Description: Reliability Considerations for SuperFlux LEDs
• Manufacturer: Lumileds Lighting, LLC

Durability, Reliability,
& Accelerated Life Tests
Mechanical Shock
Lumileds SuperFlux LEDs are encapsulated in a
solid plastic package. Therefore, they are
extremely rugged and easily survive even
extreme mechanical shock tests. As shown in
Table 6.1, Lumileds used the test conditions
specified in MIL STD 883 Method 2002
Vibration
SuperFlux LEDs perform extremely well in
typical vibration tests (up to 2 kHz). SuperFlux
LEDs have survived MIL STD 883 Method 2007
Condition A and SAE 577 vibration tests.
Mechanical Shock
Vibration Variable Frequency
Vibration
Operating Life Tests:
Weatherability
Salt Atmosphere
Corrosion
Temperature Cycle
Power & Temperature Cycle
Solder Heat Resistance Strife
Condition A: T
Condition B: T
Condition C: T
Condition D: T
Condition E: T
Condition A: Forward
Condition B: Reverse
Condition A: 55 to 100°C
Condition B: 40 to 120°C
Condition C: 40 to 100°C
Condition A: 70 mA
Condition B: 50 mA
Table 6.1
a
a
a
a
a
= 100°C
= 40°C
= 85°C
= 55°C
= 25°C
RELIABILITY, DURABILITY AND ACCELERATED LIFE TESTS
MIL STD 883 Method 2002 Condition B: 3 shocks each X Y Z axis, 3000g, 0.3 ms
MIL STD 883 Method 2007 Condition A: 4 cycles, 4 minutes, each X Y Z axis, 20g
minimum, 20 to 2000 Hz
SAE 575 DEC88 Section 4.1: 10 to 55 Hz, 1 mm peak to peak, 2 minutes per
cycle, 60 minutes total duration
All tests of duration 1,000 hours
I
I
I
I
I
85°C, 85% RH, 45 mA, 1000 h
85°C, 85% RH, 5 V, 1000 h
MIL STD 883 Method 1009: 35°C, 48 h
SAE 575 DEC88: 25°C, 2 times 24 h with one hour dry
MIL STD 883 Method 1010:
15 minute dwell, 5 minute transfer, 300 cycles
15 minute dwell, 5 minute transfer, 300 cycles
15 minute dwell, < 10 s transfer, 300 cycles
70 mA, 5 minute on/off, ~ 225°C/W
thermal resistance (T
50 mA, 5 minute on/off, ~ 225°C/W
thermal resistance (T
Reference Figure 6.3
f
f
f
f
f
40°C to 85°C, 3°C per minute transfer rate, 2 hour cycle
= 20 mA (AS)/30 mA (TS); T
= 45 mA (AS)/50 mA (TS); T
= 70 mA; T
= 70 mA; T
= 70 mA; T
j
j
j
~ 90°C
~ 60°C
~ 5°C
2
j
j
~ 120°C), 50 cycles
~ 110°C), 50 cycles
Condition B to validate the SuperFlux LEDs
mechanical shock performance. This test was
conducted three times in each direction at 3000g
for 0.3 milliseconds. All of the SuperFlux LEDs
subjected to this test survived without damage.
Ultrasonic welding is frequently used to secure
the lamp housing to the lens and is occasionally
used to secure the printed circuit assembly
containing the LEDs to mounting posts in the
lamp housing. Although ultrasonic welding of
j
j
~ 110°C
~ 110°C