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DATASHEET
9. Precautions (Continued)
(3) Thermal design
-The thermal design to draw heat away from the LED junction is most critical parameter
for an LED illumination system. High operating temperatures at the LED junction adversely
affect the performance of LED’s light output and lifetime.
Therefore the LED junction temperature should not exceed the absolute maximum rating
in LED illumination system.
-The LED junction temperature while operation of LED illumination system depends upon
thermal resistance of internal LED package (Rj-s), outer thermal resistances of LED package,
power loss and ambient temperature. Please take both of the thermal design specifications
and ambient temperature conditions into consideration for the setting of driving conditions.
-For more information, please refer to application note "Thermal Management".
(4) Driving current
-A constant current is recommended as an applying driving current to this product.
In the case of constant voltage driving, please connect current-limiting resistor to each products
in series and control the driving current to keep under the absolute maximum rating forward
current value.
-Electrical transient might apply excess voltage, excess current and reverse voltage
to the product(s).
They also affect negative impact on the product(s) therefore please make sure that
no excess voltage, excess current and reverse voltage is applied to the product(s)
when the LED driver is turn-on and/or turn-off.
-For more information, please refer to application note "Driving".
(5) Lighting at a minimum current value
-In a case where the minimum current (IF min) is applied to the product, some of LED dice
in the product might look different in their brightness due to the individual difference of
the LED dice, and they are not failed.
Symbol
Name
CITILED
CL-L400-LC1N1-B
CITIZEN ELECTRONICS CO.,LTD. JAPAN
Ref.CE-P2165 10/12
CITIZEN [ CITIZEN ELECTRONICS CO., LTD. ]
