nssw045t NICHIA CORPORATION, nssw045t Datasheet - Page 7

• Manufacturer Part Number: nssw045t
• Description: Nichia Chip Type White Led
• Manufacturer: NICHIA CORPORATION

(3) Recommended circuit
(4) Heat Generation
· In designing a circuit, the current through each LED must not exceed the absolute maximum rating
· This product should be operated in forward bias. A driving circuit must be designed so that the product
· Thermal design of the end product is of paramount importance.
· The operating current should be decided after considering the ambient maximum temperature of LEDs.
specified for each LED. It is recommended to use Circuit B which regulates the current flowing
through each LED. In the meanwhile, when driving LEDs with a constant voltage in Circuit A, the
current through the LEDs may vary due to the variation in forward voltage (V
worst case, some LED may be subjected to stresses in excess of the absolute maximum rating.
is not subjected to either forward or reverse voltage while it is off. In particular, if a reverse voltage is
continuously applied to the product, such operation can cause migration resulting in LED damage.
of the LED when making the system design.
electric power is affected by the thermal resistance of the circuit board and density of LED placement
on the board, as well as other components. It is necessary to avoid intense heat generation and operate
within the maximum ratings given in this specification.
(A)
(B)
The coefficient of temperature increase per input
-6-
Please consider the heat generation
F
) of the LEDs. In the
Nichia STS-DA1-0638
<Cat.No.090126>