10/12
DATA SHEET
9ꢀ4. Designing precaution
ꢀ A constant current circuit is recommended as a drive circuit.
When using two or more LED packages, connect current limiting resistor in series
on each path is recommended.
R
R
R
R
R
R
R
ex : Constant current circuit with resistor
ꢀ Please design a circuit that prevents any reverse voltage (excess current) from being
applied to this product instantaneously when the circuit is ON or OFF.
ꢀ CLꢀL400 has small electrode at the side of package.
Please take care about shortage with conductive rubbish.
Cathode
Anode
9ꢀ5. Soldering
(1) Lead free soldering
ꢀ1) Following soldering paste is recommended
fig : small electrode
Melting temperature : 216 ~ 220C.
Composition : Sn 3.5Ag 0.75Cu
ꢀ2) The temperature profile at the top surface of the parts is recommended as shown
below.
ꢀ3) It is requested that products should be handled after their temperature has dropped
down to the normal room temperature
4
°C/sec. Max
260°C Max
. Max
3
sec
4
°C/sec. Max
160
220°C
~
180°C
60
~
70sec
140sec
Time
(2) Recommended soldering pattern
ꢀ Mountability and solderability need to be optimized
with actual conditions such as amount of solder, reflow
temperature applied in the process.
ꢀ
Symbol
Name
CITILED
CLꢀL400ꢀMC1L1ꢀA
CITIZEN ELECTRONICS CO., LTD. JAPAN
Ref.CE-P1158 05/11
CITIZEN [ CITIZEN ELECTRONICS CO., LTD. ]
