1. Performance increase

Performance will up to 7%
depending on CRI of LEDs.
There will be also slight
decrease on forward voltage,
which increases lm/W efficacy
on LEDs.

2. MacAdam 2-step option

MacAdam 2-step binning will be
an option in new generation.
Although we have had very tight
3-step binning already, there is
now option to order also 2-step
versions of COBs. So if you desire
to have 2-step SDCM COBs in
your products, we have now
solution for that.

3.Thermal resistance decrease

Thermal resistance is further
decreased from generation 5.
Decrease from generation 5 is
5% and from generation 4 even
38,5%. This allows you to minimize
your need for heat dissipation.
Another option is that you can
create new, bigger lumen categories
with your existing products.

On the left a heat sink needed for COB Gen 4 LED. On the middle heat sink needed
for gen 5 LED. On the right, heat sink needed for COB gen 6 LED. The power of the
LED is same in every case.

4. Increase of maximum Tc

Maximum Tc-temperature has
been set to 120 degC. Allowable
Tc-temperature will rise from
105 degC to 120 degC. This will
help you to maximize light
output from your design, so you
can use smaller heat sinks to
get more light.

5. Increase of maximum Tj

You will be allowed to have
higher Tj-temperature than in
previous generations, so
maximum Tj- temperature will
be now 150 degC. This will give
you wider LED driving options
especially with bigger COB
packages.

Citizen COB LEDs continue to
increase their performance and
offer amazing coverage for
lumen packages. Packages
range from under 100 lumens
up to 60 000 lumens from a
single light source. If you
haven’t yet tried Citizen COB
LEDs, now it is good time to
learn why Citizen has been
top player in the industry for
so long time.
You can download the whole
catalogue, datasheets and
simulator tool for Generation 6
COBs from our website.

You can download the whole
catalogue, datasheets and
simulator tool for Generation 6
COBs from our website.