ASMB-UTF2-0E20B datasheet(9/12 Pages) BOARDCOM

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ASMB-UTF2-0E20B Data Sheet

2828 Tricolor PLCC-6 LED

Broadcom

ASMB-UTF2-0E20B-DS101

Precautionary Notes

Soldering



Do not perform reflow soldering more than twice.

Observe necessary precautions of handling moisture-

sensitive devices as stated in the following section.



Do not apply any pressure or force on the LED during

reflow and after reflow when the LED is still hot.



Use reflow soldering to solder the LED. Use hand

soldering only for rework if unavoidable, but it must be

strictly controlled to following conditions:

– Soldering iron tip temperature = 315°C maximum

– Soldering duration = 3s maximum

– Number of cycles = 1 only

– Power of soldering iron = 50W maximum



Do not touch the LED package body with the soldering

iron except for the soldering terminals, because it may

cause damage to the LED.



Confirm beforehand whether the functionality and

performance of the LED is affected by soldering with

hand soldering.

Figure 15: Recommended Lead-Free Reflow Soldering Profile

Figure 16: Recommended Board Reflow Direction

Handling Precautions

Special handling precautions must be observed during

assembly of epoxy encapsulated LED products. Failure to

comply might lead to damage and premature failure of the

LED.



Do not stack assembled PCBs together. Use an

appropriate rack to hold the PCBs.



For automated pick-and-place, Broadcom has tested a

nozzle size with OD 1.5 mm to work with this LED.

However, due to the possibility of variations in other

parameters, such as pick-and-place machine maker/

model, and other settings of the machine, verify that the

selected nozzle will not cause damage to the LED.

Handling of Moisture-Sensitive Devices

This product has a Moisture Sensitive Level 5a rating per

JEDEC J-STD-020. Refer to Broadcom Application Note

AN5305, Handling of Moisture Sensitive Surface Mount

Devices

for additional details and a review of proper

handling procedures.



Before use:

– An unopened moisture barrier bag (MBB) can be

stored at <40°C/90% RH for 12 months. If the actual

shelf life has exceeded 12 months and the humidity

indicator card (HIC) indicates that baking is not

required, it is safe to reflow the LEDs per the original

MSL rating.

– Do not open the MBB prior to assembly (for

example, for IQC). If unavoidable, the MBB must be

properly resealed with fresh desiccant and HIC. The

exposed duration must be taken in as floor life.



Control after opening the MBB:

– Read the HIC immediately upon opening of MBB.

– Keep the LEDs at <30°C/60% RH at all times, and

complete all high temperature-related processes,

including soldering, curing, or rework within 24 hours.



Control for unfinished reel:

Store unused LEDs in a sealed MBB with desiccant or a

desiccator at <5% RH.



Control of assembled boards:

If the PCB soldered with the LEDs is to be subjected to

other high-temperature processes, store the PCB in a

sealed MBB with desiccant or desiccator at <5% RH to

ensure that all LEDs have not exceeded their floor life of

24 hours.

10 to 30 SEC.

6°C/SEC. MAX.

255 – 260°C

3°C/SEC. MAX.

217°C

200°C

150°C

3°C/SEC. MAX.

60 – 120 SEC.

100 SEC. MAX.

TIME

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