DC COB LED

Your Professional DC COB LED Supplier！

Shenzhen Colighting Ltd (WELCOB) was founded in Shenzhen, China in 2013 and located in Pingkui Road, Pingshan District, Shenzhen, was awarded the China National High-Tech Enterprise certification in 2021 focusing on high-end LED COB technology development, PCB circuit design and LED lighting solutions.

Why Choose Us

01.

Rich Experience

WELCOB has 20+ years of research and development in LED package and semiconductor fields. Strives to become a world famous brand of high-end LED light source.

02.

Advanced technology

We have common led assembly process for commercial cob and we have eutectic bonding process for ultra-high power COB (>1000W) and we have powder spraying process for multi-color COB LED and we have RFID tracing technology for LED inventory management system.

03.

Our Certificate

WELCOB Awarded RoHS, CE, ETL Certifications, National High tech Enterprise Certification, Obtained Utility Model Patent: System-level Integrated Lighting Module.

04.

Sales Market

Our products Export United States, Vietnam, Japan, Britain, Italy, Russia, India, Brazil, Spain, the Middle East and other countries and regions.

DC COB LED - Overview

A DC COB LED is a Chip-on-Board LED light that is designed to run on a Direct Current (DC) voltage, such as 12V or 24V. The "COB" technology involves mounting hundreds of small LED chips directly onto a single circuit board to create a dense, continuous line of light that appears as a seamless, "dotless" illumination.

Product Specification

We offers the following product specifications:

Product name	COB 3V
Model	HC4046-3-20W-CW
Power	3-20W
Input voltage	DC 3V
Working current range	1.0-6.0A
Drive mode	Constant voltage / Constant current
LED type	Flip chip COB
Board size (LxW)	40x46mm
Board Thickness	1.5mm
Emitting size (LxW)	25x25mm
Color	Cold white
CCT	6500K/8000K
CRI (Ra)	70/80/90
Luminous efficiency	110-140 lm/W
Viewing angle	120°
Substrate material	High-quality aluminum plate
Lifespan	50000 hrs
Customized options	Input voltage, Watt, Color, Size, Efficiency, Logo

Advantages of DC COB LED

Brighter output:

More chips in one place = more light.

Compact but powerful:

Ideal for high-performance lighting in small sizes.

Low glare:

Even distribution of light reduces harsh spots.

Thermal efficiency:

Designed for good heat dissipation.

Application Industry

01/

Residential: Used for accent lighting, under-cabinet lights, and general illumination in kitchens, living rooms, and bathrooms.

02/

Commercial: Suitable for offices, retail stores, hotels, and restaurants for task and ambient lighting, as well as for illuminating displays and self-checkout machines.

03/

Industrial: Provides durable and efficient lighting for warehouses, factories, and in specialized machinery like 3D printers and robots.

04/

Architectural: Features in architectural and landscape lighting to highlight features, illuminate pathways, or provide safety lighting on stairs and handrails.

05/

Automotive: Used for interior accent lighting, and in some cases, for functional or exterior lighting like taillights or highlighting control panels on EV charging stations.

06/

Entertainment: Popular for stage, concert, and club lighting, creating dynamic and aesthetic
effects in theaters, casinos, and arcades.

Manufacturing Process - COB LED

The first step is to manufacture the substrate boards for LED packaging. Ceramic PCBs are often the PCB option for COB LEDs because alumina and aluminum nitride have good thermal conductivity and do not need an electric insulation layer. PCBONLINE manufactures ceramic PCBs, aluminum PCBs, and copper substrate PCBs according to clients' designs. PCBONLINE adopts the DPC technology to manufacture ceramic PCBs that can achieve 3D design for high-power LED packaging.

The LED chips are arranged on a film. Technicians evenly expand the LED chip film to separate them using the expansion machine.

Like solder paste printing in the SMD production process, silver paste is applied on the PCB pads. The only difference is that there is no need for a PCB stencil, and the silver paste is doped on the PCB pads using a dispensing machine.

The LED chips are microchips, and assembling them on the PCBs is operated under the microscope. PCBONLINE's experienced operators pick and place the LED chips on the PCB pads using a die bonder.

This step is similar to reflow soldering in the SMT assembly process. The assembled printed circuit board is baked in a thermal cycle oven to melt and solidify the silver paste. In this way, the LED chips are attached to PCB pads tightly. When the solder paste solidifies, take the PCBA out.

If the COB LEDs have ICs (dies) that need assembling, this step and step 7 happen. Operators use the dispensing machine to dop red or black glue on the IC pads and use anti-static equipment (vacuum suction pen or sub) to pick and place the dies on the glue.

Put the PCBA assembled with IC dies in the thermal cycle oven to bake. The glue melts to connect the ICs with the circuit board. When the glue solidifies, take the PCBA out.

Customization

We are China leader Chip on board LED custom Manufacturer, offering the full choices of LED COB products from round, square, strip, and customized to any of your requirements.

Wide range of sizes, color temperature and power.creating a fashionable energy-saving solution for all kinds of LED related fields.

We design your samples in 24 hours.

We build prototypes in 7-14 days.

We deliver in 1-2 days.

Package & Delivery

1. Package: Standard export package or Custom

2. Delivery: By air express, by sea

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FAQ

Q: What are the benefits of COB LED?

A: Using a single LED can result in simpler design and product as well as providing optical advantages for uniform light and efficient optics. Electrical design is simpler because the CoB LED only requires a single two-wire power supply to the entire array of chips.

Q: When to use COB light?

A: Residential lighting: Indoors or outdoors, ceiling COB lights are ideal for living spaces, kitchens, bedrooms, and landscapes.
Commercial lighting: Enhancing the ambience of retail stores, restaurants, showrooms, and offices.

Q: How many lumens is a COB light?

A: COB lights can produce 80 lumens per watt or more, while SMD LEDs range from 50 to 100 lumens per watt, making COB lighting brighter.

Q: Is cob LED brighter?

A: COB LEDs are generally brighter than SMD LEDs. COB LEDs can produce up to three times more light than traditional LED lights, including SMD LEDs. This is because COB LEDs have multiple LED chips mounted directly onto a circuit board, while SMD LEDs have only one chip.

Q: Why are COB LEDs yellow?

A: COB LEDs appear yellow when off due to a phosphor coating that converts blue LED light into white when illuminated. This layer, often made from Ce:YAG, ensures balanced, natural lighting when the LED is turned on.

Q: Is COB LED waterproof?

A: High Color Rendering Index COB LED Strips: Experience lifelike colors with a CRI >90. Highly Waterproof and Heat Resistant: IP68 rated and designed as sauna led strip lights high temp for use outdoors and in humid, high-temperature environments like saunas without worrying about water or heat damage.

Q: Do you offer volume discounts?

A: Yes, we provide discounts for large orders. Contact our sales team for a customized quote.

Q: Is there a warranty for your products?

A: Yes, all products come with a warranty which varies by model. We will repair or replace defective items during the warranty period.

Q: How do you handle complaints?

A: We take complaints seriously and will investigate promptly, keeping you updated until a resolution is reached.

Q: What is your sample policy?

A: If we have stock, we can provide samples, but the customer must pay the sample fee and express fee Question

Q: Have you tested all your goods before shipment?

A: Yes, we will conduct 100% test before delivery, and we will send detailed photos of parts for your approval Question .

Q: How can you maintain a long-term good relationship with our business?

A: We maintain good quality and competitive prices to ensure the interests of our customers.

As one of the leading dc cob led manufacturers and suppliers in China, we warmly welcome you to buy dc cob led for sale here from our factory. Quality products and reasonable price are available.

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