With the continuous improvement of LED packaging technology in recent years. The packaging form has evolved from a single form to a diversified form, and the classification has also become diversified with the continuous changes in products:

COB packaging belongs to the HIGH POWER LED series. Its full name is Chip on Board (COB), which is a technology to solve the heat dissipation problem of LEDs. N chips are integrated together for packaging, which is mainly used to solve the problem of low-power chips manufacturing high-power light sources. It can disperse the heat dissipation of chips and improve light efficiency. At present, it is widely used in lamps such as spotlights, downlights, projection fill lights, industrial and mining lamps and street lights.

COB structure: solid crystal glue, bonding wire, chip, fluorescent glue, protective glue, copper sheet, insulation layer, aluminum

Structural diagram

COB classification:

Packaging process classification: upright COB and flip-chip COB

Substrate material classification:

Ordinary aluminum substrate, superconducting aluminum substrate, mirror aluminum substrate, superconducting copper substrate, thermoelectric separation copper substrate, mirror copper substrate, ceramic alumina substrate, ceramic aluminum nitride substrate

Luminous color classification: monochrome COB/two-color COB/RGB COB/RGBW COB/RGBCWCOB

How to calculate COB power?

The number of chips in parallel multiplied by 150 (MA) equals the normal use current. High light efficiency products

The number of chips in parallel multiplied by 60-100 (MA) equals the normal use current. Increasing the number of parallel decomposition currents reduces the actual use current of a single chip, the chip voltage will decrease, the total power will decrease, the luminous flux will increase, the light efficiency will increase, the light spot of the lamp beads will be better, the heat of the lamp beads will decrease, and the service life of the lamp beads will be increased. For example, 1313 10w voltage 30V is usually made into 10 strings and 2 parallels. Then all chips are working at full power, the heat of the lamp beads is large, and the light decay is relatively large. If the chip is made into 10 series and 3 parallel, the current used is only 100Ma, and the risk of using the lamp beads will be greatly reduced.

Common terms for COB light sources:

Substrate size: in millimeters (MM) For example, 1919, the actual size is 19MM long * 19MM wide

Light-emitting surface size: in millimeters (MM)

Power: in watts (W)

Series and parallels: The chip mixed circuit of the lamp beads is designed according to the power voltage

Voltage: in volts (V) Current: in amperes (A) Color temperature: in K

Color coordinates (X Y) represent a point on the chromaticity diagram of a color

Color rendering index: RA, the degree to which the light source presents the color of an object is called color rendering. The color tolerance unit is sdcm. It means that the closer the product light color coordinates are to the standard value, the smaller the difference between the spectrum emitted by the light source and the standard spectrum, the higher the accuracy, and the purer the color of the light. Luminous efficiency is the ratio of luminous flux to power,

Unit: lm/W Wavelength: Unit: nanometer (NM) Commonly used for monochromatic products

DUV Distance between color coordinate point and black body trajectory

TLCI TV lighting consistency index

SSI Spectral similarity index Compare with solar spectrum

Advantages of Hailongxing COB:

Good light color consistency: color tolerance is less than 3<SDCM

High luminous efficiency: The highest luminous efficiency can reach 200LM/W

Low thermal resistance: Using superconducting copper substrate and superconducting copper substrate, thermal conductivity 8W/m.k Single and double color COB make phosphor precipitation process, lower light emitting surface temperature, reliable service life Full spectrum COB RA>98 R1-R15>95 TLCI>99 SSID 85 SSIT 90

Dual color temperature COB Wide adjustable color temperature range 2700-6500K 2500-7500K 2500-8500K The full-segment color temperature display index can reach 95

Power range Dual color temperature COB 40-300W Five color COB 60-1600W

COB products that meet customer requirements can be customized according to customer requirements