Chip on board (COB) is a method of circuit board manufacturing in which the integrated circuits (e.g. microprocessors) are attached (wired, bonded directly) to a printed circuit board, and covered by a blob of epoxy. [1] 2016-08-03 What are COB LEDs? Relatively new to the LED market, chip on board (COB) LEDs offer many advantages over the standard options. COB LEDs are basically multiple LED chips (typically nine or more) bonded directly to a substrate by the manufacturer to form a single module.
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A CoB LED (or chip-on-board LED) is a single device with many LED chips mounted on a thermally efficient substrate placed below a uniform phosphor coating. Anyone who walks through a store or home with recessed or track lighting likely experiences light from a chip-on-board LED (CoB). The term COB stands for "Chip On Board", and refers to the fact that each unit is actually several LED (Light Emitting Diode) chips mounted together on the same substrate, which is often ceramic or metal. LEDs are semiconductors that produce photons of light when electrons flow across a junction and fill "electron holes" on the other side. A COB chip is a sort of packaging where several chips are put directly onto a substrate or circuit board without requiring individual encapsulation. COB stands for "Chip on Board." COB chips typically consist of dozens to hundreds of tiny chips connected in parallel and put on a common metal or ceramic substrate. COB LED Technology Explained Chip on board (COB) technology is a method of directly mounting red, green, and blue chips onto a printed circuit board (PCB). Packaging the bare chips directly onto the PCB enables a much higher chip density while creating a flat uniform LED surface. The combination of three-color values allows the chips to achieve.
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Chip-on-Board or "COB" refers to the mounting of a bare LED chip in direct contact with a substrate (such as silicon carbide or sapphire) to produce LED arrays. (Source: SUMBULBS) LED technology is constantly being improved to improve performance, create more use cases, and make it more versatile. LED COB chips vary widely in their applications and thus different chips require different wattage, voltage and produce vastly different lumen counts. However, LED COB chips have good lumens per watt ratio, starting typically from 80 lumens per watt minimum and going up to 100 lumens per watt or more. This attribute of high efficiency makes. In many PCBs, especially the low cost electronic devices we must have noticed some little small black humps / blob. These are called Circuit On Board or simp. There are usually nine chips (or more) in a module. As you can tell, this can amount to more intense lighting that can reach up to 250 lumens (at 20mA) on a large chip. Furthermore, they appear as one light instead of multiple single lights. Advantages and Disadvantages of COB LEDs This section will cover a few pros and cons of using COB LEDs.
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Chip-on-Board or "COB" refers to the mounting of a bare LED chip in direct contact with a substrate (such as silicon carbide or sapphire) to produce LED arrays. COB LEDs have a number of advantages over older LED technologies, such as Surface Mounted Device ("SMD") LEDs or Dual In-line Package ("DIP") LEDs. COB LED lights are comprised of many tiny LED chips that have direct contact with the substrate. With COB LED, there are usually 9 or more diodes on a single board or module. The chips appear to form a single module instead of looking scattered on the circuit. This is due to the close-knit mounting strategy employed on the substrate.
COB, or Chip-on-Board, technology is primarily used to address the challenge of manufacturing high-wattage LED lights with low-power chips. This technology helps in dissipating the heat generated by the LED chip, improving light efficiency, and reducing the glare. LUXEON CoB LEDs (chip on board) are a family of products that enables easy to design lighting applications. Due to their efficacy and thermal resistance, LUXEON CoB LEDs stand out in the market. In addition, their small Light-Emitting Surface (LES) makes them very easy to work with and will enable easier and less expensive designs.
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Overview Custom COBs Catalogs by Wavelength (UV A/B/C) COB modules for easy testing and integration. Chip on Board (COB) solutions give you more power in a flexible design. With chips bonded directly on a MCPCB in close configurations for increased efficiency, COB UV LEDs have the lowest thermal resistance for the best reliability on the market. Advantages of COB LEDs. Being multi-chip packaged, the light emitting area of a COB LED can contain many times more light sources in the same area that standard LEDs could occupy resulting in a greatly increased lumen output per square inch. COB LEDs use a single circuit with just two contacts to energize the multiple diode chips it houses.
