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1 W IR 730NM high power led

Item No.: 46

Product Description

Absolute Maximum Ratings at Ta=25

Item

Symbol

Absolute Maximum Rating

Unit

DC Forwar Curren dt

IF

350

mA

Peak Forward Current

IF

500

mA

Reverse Voltage

VR

5

V

Power Dissipation

PD

1000

mw

Electrostatic discharge

ESD

±4500

V

Operation Temperature

Topr

-40~+80

Storage Temperature

Tstg

-40~+100

LeadSoldering Temperature

Tsol

Max.260 for 6 seconds Max.

Life test

----

1000 H Luminous intensity weaken< 5%(350mA,Ta=65);

50,000 H Luminous intensity weaken < 20% (350mA,Ta=65);

Notes:

* IFP Conditions: pulse Width10msec.

* All high power emitter LED products mounted on aluminum metal-core printed circuit board, can be

lighted directly, but we do not recommend lighting the high power products for more than 5 seconds

without a appropriate heat dissipation equipment.

Electrical Optical Characteristics at Ta=25

Parameter

Symbol

Min.

Typ.

Max.

Unit

Test Condition

Forward Voltage

VF

1.7

---

2.0

v

If=350mA

Reverse Current

IR

---

---

50

uA

VR=5v

50% Power Angle

2θ1/2

---

120

---

deg

IF=350mA

Luminous Intensity

φV

6

---

10

lm

IF=350mA

Chromaticity

λd

730

---

740

nm

IF=350mA

Notes:1.Tolerance of measurement of forward voltage±0.1V.

2.Tolerance of measurement of peak Wavelength±2.0nm.

3.Tolerance of measurement of luminous intensity±15%.

 

 

 

Safety Use Instructions of High-power LED Products

In the application of high-power LED products and components,heat dissipation,electrostatic shielding,welding have great impact to its properties,they should be think highly by the ended users.

一、Heat dissipation

With the present technology restriction of the semiconductor emitting diode chip,the efficiency of LEDs photoelectric conversion needs to be improved, especially high-power LED, because its power is higher, about more than 60% of electrical energy turns into heat and then release (but with the technology developpment, the efficiency of photoelectric conversion is increasing), which requires the terminal customers to make sure that the heat is dissipated well in the application in order to ensure that the high-power LED products are work normally.

1 .Requirements of the heat sink

Exterior and material: if the seal of finished product is not demanded too high and can occur convection directly with outside air,it is recommended to use aluminum or copper cooling fin.

2.Effective cooling surfacial area

For 1W white color high-power leds (same as other colors),it is recommend the total effective cooling surface should equalto or greater than 50-60 square centimeter; For 3W products,should equalto or greater than 150 square centimeters; the higher the power is, the larger the surface should be.Anyhow, be sure that temperature of the cooling fin is less than 60.

3.Connection ways

Be sure that two surfaces is neat and can contact well when connecting the substrate and the cooling fin.In order to strengthen the combination of the two surfaces,it is suggestted coating a layer with heat conduction silicon grease on the surface (the coefficient of heat conductivity of silicon grease 3.0 W/m.k), thermal silicon grease requirements should be applied evenly and q.s.,then press fit and fix with screws.

二、Electrostatic shielding

LED, belonging to semiconductor devices,is sensitive to electrostatic, so it is necessary to prevent electrostatic generation and eliminate static electricity,especially the white, green, blue and purple LED.

1Electrostatic generation

the friction: in daily life,the most common method,any two different material objects contacted again after separated can produce static,that is friction born electricity.The better the insulation of the material is ,the easier friction electricity born.In addition,any two different objects contacted again after the separated also can produce static.

induction: concerning conductive materials,for electronic can flow freely on its surface,if placed it in an electric field,as same-sex reactive,opposites attract,positive ions and anoin will transfer,charge can produce too.

conduction: considering conductive materialas electrons can free flow on its surface,if contacted with a charged object,the charge will transfer.

2The harm of static

the heat generated by a sudden electric field or current will hurt is still on,but the brightness is lower and life is reduced. 

because of LED insulating layer is destroyed by an electric field or current, the component cannot work (or destroyed),and the light is performed as a death one.

3. Protection and elimination of static

In the whole procedure (including production,testing,packaging, etc.), all employees who is directly contact with the LED should take measures to prevent or eliminate electrostatic.There are several ways:

workshop should be laid anti-static floor and completely connect the ground.

worktable should be anti-static,and the production machines is grounded well.

operators should wear anti-static suits,take anti-static wristband, gloves or foot loop.

workshop should be applied with ion blower fan.

electric soldering iron should be well grounded.

packaging should be antistatic materials.

三、Welding

1, when welding,please use constant temperature soldering iron, the welding temperature should below 260,and the contact time should not exceed 3S each time.

2, if it is a silicon encapsulating high power LED,the highest heat-resisting temperature of silicone is 180 ,so welding temperature can not exceed 170 ;please useing low-temperature soldering iron and low temperature solder paste (silk) and the soldering time does not exceed 3S each time.

3, if uesing soft colloid, the reflow soldering temperature should maintain at 260 , do not forcibly pressure beads colloid part, in case of internal structure be damaged.

Custom specifications are also available. Please feel free to contact us.

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