22

J SERIES™ 2835 LED

NOTES

Measurements

The luminous flux, radiant power, chromaticity, forward voltage and CRI measurements in this document are binning specifications only

and solely represent product measurements as of the date of shipment. These measurements will change over time based on a number

of factors that are not within Cree Venture’s control and are not intended or provided as operational specifications for the products.

Calculated values are provided for informational purposes only and are not intended or provided as specifications.

Pre-Release Qualification Testing

Please read the J Series Reliability Overview for the details of the pre‑release qualification testing for J Series LEDs.

Lumen Maintenance

Cree Venture uses standardized IES LM‑80‑08 and TM‑21‑11 methods for collecting long‑term data and extrapolating LED lumen

the LED junction temperature.

Moisture Sensitivity

Cree Venture recommends keeping J Series 2835 LEDs in the provided, resealable moisture‑barrier packaging (MBP) until immediately

prior to soldering. Unopened MBP that contains J Series 2835 LEDs does not need special storage for moisture sensitivity.

Once the MBP is opened, J Series 2835 LEDs should be handled and stored

as MSL 3 per JEDEC J‑STD‑033, meaning they have limited exposure time

before damage to the LED may occur during the soldering operation. The

table on the right specifies the maximum exposure time in days depending

on temperature and humidity conditions. LEDs with exposure time longer

than the specified maximums must be baked according to the baking

conditions listed below.

Moisture

Sensitivity

Level

Temp.

Maximum Percent Relative Humidity

50%

60%

70%

80%

90%

Level 3

35 ºC

8

5

1

0.5

0.5

Level 3

30 ºC

11

7

1

1

1

Level 3

25 ºC

14

10

2

1

1

Level 3

20 ºC

20

13

2

1

1

Baking Conditions

It is not necessary to bake all J Series 2835 LEDs. Only the LEDs that meet all of the following criteria must be baked:

1. LEDs that have been removed from the original MBP.

2. LEDs that have been exposed to a humid environment longer than listed in the Moisture Sensitivity section above.

3. LEDs that have not been soldered.

LEDs should be baked at 60 ºC for 24 hours. LEDs may be baked in the original reels. Remove LEDs from the MBP before baking. Do

not bake parts at temperatures higher than 60 ºC. This baking operation resets the exposure time as defined in the Moisture Sensitivity

section above.