NS2W157R Nichia, NS2W157R Datasheet - Page 6

• Manufacturer Part Number: NS2W157R
• Manufacturer: Nichia

Specifications of NS2W157R

• Size Lxwxh (mm): 3.0x1.4x0.52
• Lumi-nous Inten-sity Typ(cd): 18.6
• Lumi-nous Flux Typ(lm)): 55.0
• Forward Voltage Vf(v) Typ: 6.40
• Forward Voltage Vf(v) Max: 7.00
• Directivity (degree): 120
• If (ma): 75
• Mounting Style: Through Hole

(3) Static Electricity
(4) Application Design Considerations
· Static electricity or surge voltage damages the LEDs.
· All devices, equipment and machinery must be properly grounded. It is recommended that precautions
· When inspecting the final products in which LEDs were assembled, it is recommended to check
· Damaged LEDs will show some unusual characteristics such as the forward voltage becomes lower,
· 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
· For stabilizing the LED characteristics, it is recommended to operate at 10% of the rated current or
It is recommended that a wrist band or an anti-electrostatic glove be used when handling the LEDs.
be taken against surge voltage to the equipment that mounts the LEDs.
whether the assembled LEDs are damaged by static electricity or not.
static-damaged LEDs by a light-on test or a VF test at a lower current (below 1mA is recommended).
or the LEDs do not light at the low current.
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
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.
higher.
Criteria : (V
(A)
F
> 4.0V at I
F
=0.5mA)
(B)
-5-
F
) of the LEDs. In the worst case,
It is easy to find
Nichia STS-DA1-1142B
<Cat.No.100513>