Input voltage:
That is, the voltage value required for the normal operation of the LED lamp, according to different countries have different input voltage values, we usually refer to the civil full voltage is AC85~264V.
input power:
Input power refers to the product of the input voltage and input current of various types of electrical components, that is, the power supplied by the power supply or the power grid to various types of electrical devices. Unit - Watt (W) Pi (input power) = Vin (input voltage) * Ii (input current)
Power factor:
Also known as the power factor, the English abbreviation PF (Power Factor), is the ratio of active power to apparent power. The power factor reflects the proportion of electric energy that can be utilized to a certain extent, and is an important indicator for rational use of electricity.
Constant current accuracy:
Constant current accuracy means the ratio of the output current fluctuation value to the rated output current when the input voltage of the driving power supply varies within a certain range, usually expressed as a percentage. For example, the rated output current of an LED driving power supply is 0.45A, when the input voltage is at When the AC80~264V changes, the measured output current varies between 0.43-0.45, then the constant current accuracy = (0.45-0.43) ÷ 0.45 ≈ 0.045 = 4.5%. The higher the constant current accuracy, the better the LED works, and vice versa. There will be stroboscopic phenomena, and even more serious will lead to LED failure.
Electromagnetic Compatibility:
Electromagnetic compatibility (EMC) refers to the ability of a device or system to function properly in the electromagnetic environment in which it is located and does not constitute unacceptable electromagnetic disturbances to anything else in the environment (eg, causing the radio to fail to play properly, causing the television picture to appear And so on).
CWDM - Coarse Wavelength Division Multiplex
CCWDM is Compact CWDM (Compact Coarse Wavelength Division Multiplexing), a wavelength division multiplexing technology based on TFF (Thin Film Filter). It works in the same way as CWDM modules, except that CCWDM uses free space technology. , compared with the common CWDM optical fiber cascading method , the CCWDM package size is greatly reduced compared with CWDM modules, and the insertion loss is lower and the consistency is better; it can replace CWDM Products are used in telecommunications, enterprise networks, PON networks, cable television and other fields. The lower insertion loss enables the CCWDM module to have lower signal attenuation during use, thereby reducing the power requirements of the signal transmitter.
For the CWDM module, limited by the minimum bending radius of the optical fiber line, the size of the packaging box cannot be made too small, resulting in most of the space in the box being idle. The adjacent channels of CCWDM use parallel beams to cascade in free space instead of optical fibers. Without the optical fiber used for cascading, the size of the CCWDM packaging box can be greatly reduced. For example, the size of the common standard 4CH CWDM is 80×60×12 mm, and the size of the CCWDM module of Yiyuantong is 50×27×7.7mm, which is only 1/4 of the standard CWDM package size. Can be widely used in high-density environments.
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