Hi team,
We are currently using the GB PSLM31.13-ETFR-56-1-100-R18 LED from OSRAM during the design and development of a medical product.
Our system integrates a total of 455 LEDs, and we are observing significant variations in brightness from one LED to another.
How can we confirm all the LEDs sent within the reel ordered have the same grouping/binning specifications?
Welcome to the TechForum Community!
The group/binning information can be found on the reel. If you’re ordering a smaller quantity of the reel size, make sure to request the binning information from the tape and reel by entering the binning requirements in the web order notes.
Thank you for your input, Jeff!
As we are now planning to scale up the manufacturing quantity for the project and binning specifications must remain consistent for all LEDs to ensure the proper essential performance for the device, can you provide clarifications on the following:
How can we specify our binning/grouping requirements on the order? Is a different purchase order with the required specifications needed or just adding the binning requirements in the web order notes sufficient?
Is there a cost implication as a result of requesting a specific group code?
I uploaded the label from our last order for reference. Any chance there is a way you can confirm the binning specs are consistent for all LEDs just by looking at the information on the label? To clarify, we didn’t add the binning requirements in the order notes when we passed this specific order.
If a specific bin is required, then enter the bin/group into the web order notes and we will see if we can accommodate at the time we pick the part. Otherwise, we can look at doing a non-catalog request for the specific bin/group and order directly from the supplier. Full manufacturing quantity, price and lead times would apply for non-catalog requests.
There’s useful information in the datasheet on the topic. Firstly, the ordering information indicates that the permitted flux range is 9.7~14lm @ 100mA for the indicated test current.
Further down there is a table of “brightness groups” describing narrower ranges. The 4-letter code in the orderable part number indicates the range of these subdivisions which may be used to fulfill orders. Similarly, there are also subgroupings for forward voltage and wavelength.
For any given manufacturer’s reel, the manufacturer’s label should contain a “group name” (i.e. “bin code”) field identifying where the parts contained exist along this 3-dimensional space. The reel should contain only product falling within the group code indicated.
Confusing bin codes and orderable part numbers is a common error. For practical reasons, LED manufacturers do not offer individual bin codes for trade, only collections of such. The bin code information is provided as a courtesy to facilitate adaptation in cases where the natural variability of device yields is undesirable, but it is the customer’s responsibility to adapt.
Unfortunately, DigiKey cannot support requests for specific LED bin codes. Bin code information can be requested at the time of order for value-added quantities (cut tape or Digi-Reel) but the risk of oversight in that process is non-trivial. The more reliable route is to order the Tape & Reel part number, so as to receive manufacturer’s standard package/labeling.
Since the standard quantity is 4500 units per reel, designing the device to incorporate 5 fewer LEDs per unit would seem useful from a manufacturing efficiency perspective if the prospect of mixed bin codes within an end product is unwanted.
