Specification

1. Ceramic thermoelectric separation eutectic package, extremely small internal stress and excellent heat transmission channel;

2. The relative expansion coefficient is small, the stability is good, the air tightness is good, and it is suitable for use in more severe environments;

3. Product environmental protection certification meets environmental protection requirements.

Product Name	3535 SMD LED CHIP 3V 1W				Product Model	GS-3535
Power Dissipation	3W				Light Color	White Color
Forward Voltage	3.0-3.4V				Viewing Angle	120°
Forward Current	1000mA				Operating Temperature	-40~+60 ℃
Color Temperature	5000-8000K CCT				Storage Temperature	-40~+85 ℃
Luminous Flux	350mA	700mA	1.0A	1.2A	Soldering Temperature	260℃
@ Current	120-150LM	300-330LM	350-380LM	380-400LM	Other 3535 Type	1W, 2W,3W,4W,5W

3535 SMD LED CHIP Clear View

Package details

3535 SMD LED Chip Application

Do LEDs create heat?

Incandescent bulbs produce heat that is felt in the beam of light, much like the heat that is felt from sunlight. The light from LED bulbs does not create additional heat in a room, but some parts of them can get hot, so be careful when you touch the base around an LED bulb that has been on for a while. To combat the negative effects of heat on LED bulb performance, manufacturers incorporate heat sinks in their designs to transfer heat from the LED. Like a cold spoon that warms up in a hot cup of water, the heat leaves the LED through the heat sink, in a process called conduction, without emitting heat.

How do lighting LED lights work

LED lights use basic LEDs as the component within the LED lighting lamp. The light emitting diodes emit light when a current limited voltage is applied across the diode in the forward conducting sense. They diodes must be operated under the correct conditions of voltage and current - they do not like over-voltage and the current must be limited. Also they do not like being reverse biassed over a certain small voltage.

The operating voltage of a standard white-light LED is usually in the range of 3 to 3.6 volts. Although this makes LEDs easy to use within low voltage circuits, and in equipment like mobile phones, the voltages provided by light fittings are much higher voltage, typically 240 or 120 volts and they are also alternating current, AC. As a result, conversion circuitry is required to transform the AC line voltage into a form that can drive individual LEDs.

For domestic LED lighting, cost is a significant driver and therefore all the circuitry needs to be kept to an absolute minimum. This means that only the circuits that are absolutely crucial are included within the LED lighting bulb.

Accordingly the main areas of the circuit include the following, although different LED lighting bulbs from different manufacturers often use slightly different circuit configurations.

• Input fuse:   To prevent catastrophic disintegration in the case of a short circuit or other over-current failure an input curse is needed. Fire safety requirements can sometimes be met by using a thin printed circuit board conductor that will blow and act as a very rudimentary fuse, although this is not to be recommended - some very cheap LED lighting bulbs may use this approach. It may meet the safety tests where components are shorted or opened, but it would not protect against the overload conditions caused by leaking electrolytic capacitors on the input stage. The only real solution is the use of a proper fuse even though it might cost more. It is often best to buy lighting LEDs from established brands although this is not a complete guarantee.

• Input transient protection:   It is essential to use some form of transient protection, otherwise the first electrical storm in the area will end the life of the lighting LED. Movistors are typically used. Especially with price sensitive LED lights, where voltage margins may be tighter, these are essential

• Bridge rectifier:   As LEDs themselves require to operate from a direct voltage and not alienating current, a rectifier is required. The most effective form of rectifier for this type of circuit is a bridge rectifier - it provides full wave rectification utilising both halves of the incoming waveform for greatest efficiency, and also it does not require the use of a centre tapped transformer which would not be appropriate in these applications.

• Capacitor smoothing:   The waveform that emanates from the bridge rectifier consists of a series of half waveforms rising to the peak voltage and falling to zero. For the LED control circuits to work, some smoothing is required.

• Current source:   The drive for the LEDs themselves consists of a low cost DC-DC converter providing a constant current source for the LEDs.

• High brightness LEDs:   The LEDs used within he LED light are high brightness versions. There are typically several of these, sufficient to provide the required light output.

The circuits used within the LED lighting bulbs vary from one manufacturer to the next. The exact ways of achieving the same result vary considerably although the main blocks described above are typically used.

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