White LED welding technology requirements


The requirements for blue and green LED soldering are the same as those for white LEDs. In terms of the level of general white LED soldering, there are such basic requirements. The operation needs to be noted as follows:

1. Always wear anti-static gloves, anti-static wrists, and electric irons must be grounded during production. It is strictly forbidden to touch the two lead pins of white LEDs with bare hands. Because the anti-static of white LED is 100V, and the working humidity on the workbench is 60%-90%, the static electricity of the human body will damage the crystal layer of the LED. After working for a period of time (such as 10 hours), the diode will be ineffective (not lit). ), will be invalid immediately if it is serious.

2. The soldering temperature is 260 ° C for 3 seconds. If the temperature is too high, it will burn out the chip if it takes too long. In order to better protect the LED, the LED colloid and the PC board should be kept at a distance of 2mm or more, so that the solder heat is dissipated in the pin.

3. The normal working current of the LED is 20mA, and the small fluctuation of the voltage (such as 0.1V) will cause large fluctuations in current (10%-15%). Therefore, in the circuit design, different current limiting resistors should be paired according to the voltage drop of the LED to ensure that the LED is in the best working condition. If the current is too large, the LED will shorten the life and the current will be too small to reach the required light intensity.

Generally, the LEDs are separated by color separation, that is, the LED light intensity, voltage, and light color in the same package are consistent, and are indicated on the spectrometer.

Dimmable LED Flood Light

Dimmable UFO Flood Light can be adjusted the brightness of the light, including 0-10v dimmable,Dali dimmable, Triac dimmable and Zigbee dimmable.


0-10V Dimmable:

Used as an early fluorescent dimming system and still used today, 0-10V dimming has been adapted to become a reliable LED dimming control protocol.0-10 V is one of the earliest and simplest electronic lighting control signaling systems; simply put, the control signal is a DC voltage that varies between zero and ten volts. The controlled lighting should scale its output so that at 10 V, the controlled light should be at 100% of its potential output, and at 0 V it should at the lowest possible dimming level.


0-10v dimmable


Dali dimmable: 

A basic system could consist of a few light fittings and a switch connected to a DALI group controller. The switch provides on/off control and up/down dimming of the fittings. Minimal configuration is required and ballasts do not need to be individually addressed.A grouped system consists of multiple ballasts individually addressed on a DALI Line Inputs on a Line Controller or a group controller can be configured to provide switching and dimming as required.

dali dimmable

SCR Dimmable:

A SCR is a four-layer solid state device that controls current. In the normal [off" state, SCR restricts current to the leakage current. When the gate-to-cathode voltage exceeds a certain threshold, SCR turns [on" and conducts current. A SCR will remain in the [on" state even after gate current is removed so long as current through the device remains above the holding current. Once current falls below the holding current for an appropriate period of time, the device will switch [off". If the gate is pulsed and the current through SCR is below the holding current, SCR will remain in the [off" state.To achieve the dimming effect using SCR dimming technique, first, a RC phase shift is used to delay triggering the gate-to-cathode voltage. There will be a phase-cutting and the Root Mean Squared Voltage VRMS is modified. The symmetric characteristic of DIAC (DIode for Alternating Current) can be used to trigger TRIAC (TRIode for Alternating Current) symmetrically. Then, the dimming effect can be achieved by varying the R1 value that changes the phase angle for conduction.


led wall pack lights

Zigbee:

Zigbee is a kind of brand-new, focus on low power consumption, low cost, low complexity and low rate of short-range wireless communication technology.Is also a big focus in the embedded application.

ZigBee





Dimmable LED Flood Light

0-10V Dimmable LED Flood Light,Dali Dimmable LED Flood Light,Scr Dimmable LED Flood Light

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