The fundamental difference between COB chip and LED

What is a COB chip?

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.

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Because of their excellent efficiency and power density, COB chips have grown in popularity recently. They are a popular option for various lighting applications since they may offer more light output with less energy use than conventional chips. Furthermore, COB chips are frequently smaller than conventional LED chips. It makes them a viable choice for applications requiring a small form factor.

The Basics of Chip on Board (COB)

A printed circuit board (PCB) is directly mounted with an unpackaged semiconductor chip using the Chip on Board (COB) method, which also requires wire bonding the chip to the PCB. Doing away with the requirement for an external package and lowering the number of interconnects results in a more reliable and compact electronic device.

The COB procedure includes the following steps:

Die Attach: A die-attach machine mounts the semiconductor chip onto the PCB. Then, the chip adheres directly to the Board using conductive adhesive or solder.

Wire Bonding: Little copper, aluminum, or gold-plated wires link the chip to the Board after mounting it. Instead, a wire bonding machine connects the wires.

Encapsulation: We apply a protective resin or epoxy to the wire-bonded chip. It protects against environmental elements like moisture, temperature, and mechanical stress.

The following are only a few advantages of COB technology:

Size and Weight: Because COB technology does not require a separate chip container, electronic products can be made smaller and lighter.

Reliability: COB technology removes the danger of package failure due to temperature cycling, vibration, or mechanical stress by directly connecting the analog chip to the Board.

Cost: COB technology can lower manufacturing costs because it does not require a separate chip package or interconnects.

LED lights, automotive electronics, consumer electronics, and medical equipment frequently employ COB technology.

Differences between LED and COB

LEDs and COBs, two separate lighting technology kinds, are widely used in several applications. However, while they have certain things in common, they also differ significantly from one another.

Chip on Board and Light Emitting Diode both go by the acronym COB. COB is a particular application of LED technology that entails installing several LEDs on a single circuit board. LED is a solid-state lighting technology that uses a semiconductor to produce light. The following are some of the main variations between these two lighting techniques:

Design and construction

The structure of LED and COB lighting is the key distinction. LEDs are tiny semiconductor chips emitting light when exposed to an electric current. Plastic packaging that helps to both protect the semiconductor from the outside elements and offer electrical connections is typically used to house them.

Contrarily, COB lighting entails directly putting several LED chips on a printed circuit board (PCB) and fusing them together via wire bonding. A phosphor film is next applied to the LEDs to create white light.

Light output and intensity

Compared to individual LEDs, COBs often produce light with a higher intensity. This is so that they can produce a focused beam of light due to the tight mounting of the individual LEDs on a COB.

Unlike the LEDs on a COB, which are close together, LEDs typically produce light with a lower intensity. Yet, they can be employed in various applications because they may be produced in various sizes and forms.

Efficiency and energy consumption

Since COBs produce more light with less energy than individual LEDs, they are often more efficient. This is due to the close mounting of the LEDs on a COB. It then lowers the energy lost as heat.

On the other hand, LEDs are less effective than COBs because they produce light of lesser intensity and are not close to each other. Though, they are still more effective than conventional lighting methods like incandescent lights.

Color rendering

In general, COBs are more precise at reproducing colors than individual LEDs. This is so because a COB&#;s phosphor coating generates a wider light spectrum than a single LED. Because of this, COBs are more suitable for uses like photography and art display, where color fidelity is crucial.

On the other hand, the restricted range of light that LEDs can produce can make it challenging to reproduce colors precisely. However, improvements in LED technology have made it possible to develop LEDs. They can generate a wider spectrum of light, making them more appropriate for uses where color fidelity is crucial.

Price

In general, COBs cost more than individual LEDs. This is because they require more manufacturing processes and resources. After all, they consist of numerous LEDs on a single PCB. Since cost is less of an issue, COBs are better suited for applications where strong light output and color accuracy are crucial.

On the other hand, because they are easier to make and use fewer materials, LEDs are typically less expensive than COBs. This makes LEDs more suitable for lighting in homes or businesses where cost is the main consideration.

What voltage is COB Chip?

A COB (Chip on Board) chip&#;s voltage might change based on the product&#;s design. For example, according to the size, power rating, and intended application of the COB, COB LEDs can run at low voltage, typically between 2V to 50V.

The manufacturer&#;s datasheet offers details on the chip&#;s electrical properties like the operating voltage, current rating, and power consumption. It contains information on the voltage needs of a COB. Therefore, it is crucial to check the datasheet thoroughly to ensure the COB is compatible with the power supply and other application parts.

A constant current driver, instead of a constant voltage supply, is frequently essential for COBs to function successfully. This is so that a constant current driver can help ensure the COB receives a stable and consistent current. However, a COB&#;s current draw can vary based on the temperature and other external factors. Because of this, it&#;s crucial to choose a constant current driver that complies with the voltage and current demands of the COB chip.

COB Chip lifespan

A COB (Chip on Board) chip&#;s lifespan can vary based on several variables. They include the caliber of the materials used, the environment in which it operates, and the current and voltage levels it faces while in operation.

A high-quality COB chip typically has a lifespan of 50,000 to 100,000 hours or more, substantially longer than that of incandescent or fluorescent lights. As a result, even with constant use, a COB chip can last several years.

The operating temperature can also affect how long a COB lasts because too much heat will shorten the chip&#;s life. As a result, it&#;s crucial to ensure the COB properly cools. The operating temperature should stay within the manufacturer-recommended range.

It&#;s important to remember that a COB chip&#;s lifespan depends on how long it takes for its lumen output to decline by 70%. The chip may continue to produce light after this, but it will be considerably less bright.

Summary

In conclusion, the choice between LED and COB lighting technologies depends on the application&#;s particular requirements. Both lighting technologies offer advantages and limitations. While LEDs are ideal for applications where cost is the main consideration, COBs are ideal for those where excellent light output and color accuracy are crucial.

LED lights come in a variety of types. Among them COB and SMD LED gain great popularity. And here comes the question, SMD VS COB LED, what are the differences?

Key difference in SMD and COB LED components

*SMD LED construction

SMD LED, which is short for Surface Mounted Device LED, is the most common LED in the market. The LED chip is a versatile electronic component that is permanently fused to a printed circuit board. It is applied to light bulbs and string lights, as well as your 's notification light.

SMD LED chips are available in a variety of sizes. For example, one of the SMD chips, the SMD LED is 5mm wide while the SMD has a width of 3.5mm. As you can see, SMD chips are compact, practically identical to the flat, square computer chip architecture.

*COB LED construction

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What is LED COB? COB LED technology is a recent advancement in LED lighting that allows for more effective energy use. As for COB manufacturing, it has several diodes on the same surface as SMD chip does. However, the distinction between them is that COB LED has more diodes.

Typically, COB chips feature 9 or more diodes. No matter how many diodes, they have only one circuit and two contacts, resulting in a panel-like look of COB LED lights.

Other differences in characteristics

1. Brightness

When SMD VS COB LED in brightness, it also distinguishes. The level of brightness highly depends on the lumen output by the involved chips. Generally speaking, compared to other light sources, LED lights are capable of illuminating with brighter light, a result of higher lumen. But among different types of LED, the lumen differs.

For example, COB LED lumen is 80 lumen per watt at least, while SMD applies 50 to 100 lumen per watt, while the lowest measure of COB is 80 lumen per watt. Therefore, lights with COB are brighter.

2. Energy efficiency

In general, working with LED light like COB light ensures great energy efficiency. This is why, in comparison to filament bulbs, they are gaining popularity and becoming the most favored light source.

With this in mind, you can assured that both SMD and COB LEDs will be extremely energy efficient. But pay attention that the energy efficiency varies according to the lumens used. The higher the lumen measures, the greater the energy efficiency is.

3. Color temperature

SMD is more adaptable and offers a wider range of options when it comes to color and color temperature. It is easier to get a varied color since different primary colors can be used. When you wish to adjust the color temperature, it also works. A red, green, or blue diode could be included in the chip. You can already make practically any color with these three diodes by altering the output level.

As for the COB, however, the ability to modify the colors and color temperature is limited. It is designed to emit only one color and temperature of light. But as a result, it offers more stable lighting.

4. Quality of light

When it comes to the quality of light, it is also different when SMD VS COB LED. This is primarily due to the fact that they each use different numbers of diodes, which influences the brightness and range of lighting.

When it comes to SMD LED lights, the resulting light has a glare to it and is ideal to be utilized as a point light, a result of the attachment of multiple light sources.

COB light fixture, on the other hand, will emit a uniform and glare-free light. It produces a light beam that is homogeneous and easy to modify. This is primarily because of its wide-angle beam, which makes it a better light source. Therefore, you can DIY LED COB as surface light.

5. Cost

The cost of getting devices built with these different technologies differs. They are both strongly dependent on manufacturing costs, which are distinct.

When compared to its counterpart, SMD has a greater production cost. For example, SMD is more expensive than COB when comparing the labor and manufacturing process to the material cost.

Generally, the cost of SMD accounts for 15% of the total material cost. As for COB, labor and production costs contribute for 10% of the material cost for. This demonstrates that chip on board LED saves you roughly 5% on manufacturing costs.

Table: Differences to consider when decide which to use

Type

Brightness

Color temperature

Using

Cost

COB

&#;80 lumen per watt

Unchangeable

Surface light

5% less

SMD

50 to 100 lumen per watt

Changeable

Point light

Higher

When to use: the difference determines

LED lights play an important part in our daily life, especially in photography and architectural lighting. When having a purchase, SMD VS COB LED, which is more suitable? Let&#;s have a look.

Photography

In most cases, LED COB bulbs are wildly used in LED video light for photography. As we know, COB lights features luminous uniformity because of its wide beam angle, making it preferable among photographers and filmmakers.

For example, the COLBOR CL100 is a 100W COB LED light. It provides stable 100W output in bi-color temperature, enabling you to spend less time adjusting the setting. Moreover, it is incredibly light so that you can use it for mobile filming without burden. The CL100 helps you show objects in natural colors.

Architecture

In architectural lighting, COB LED chips are utilized in more complex lighting applications to provide better beam angles and more aesthetically pleasing fixtures. However, SMD LED are utilized in more general lighting fixtures like diffused panel lights, which have a frosted diffuser covering the light source.

Conclusion

The differences in SMD VS COB LED are various such as brightness, color temperature, manufacture cost. Meanwhile, they are suitable for different applications. Just have an understanding of them and you will get an ideal LED light for video shooting and other uses.

Contact us to discuss your requirements of high power cob led chip. Our experienced sales team can help you identify the options that best suit your needs.