
COB (Chip on Board) LEDs are compact LED modules with a bright light output. They consist of a small square or circular substrate which houses multiple LED chips/dies. These are covered with a phosphor coating. The most common colour of COB LED is white, however there a few more colours available as the technology develops.

How do they work?

COB LEDs have a base substrate, made of aluminium or ceramic, on which the LED dies are mounted. The actual LEDs provide a blue light. The number of LED dies and their typical luminous flux determines the "brightness" of the COB LED.

The layer of phosphor, which is an orangey-yellow colour, sits on top of the LED dies. The phosphor converts the blue LED dies into a white light. The type of phosphor creates different colour temperatures.

What is colour temperature?

Colour temperature describes the warmth or coolness of the LED light output. "Warm" COB LEDs offer a yellow-orange light output while "Cool" COB LEDs tend to be a bluer white. Colour temperature is measured in Kelvins with the symbol "K".

What are the advantages of COB LEDs?

• Higher LED density than traditional LED mounting process

• No need for multiple soldering - just one package

• Bright light output

Uses for COB LEDs:

• General purpose lighting

• Downlights

• High Bay lighting

• Low Bay lighting

• Spotlights

• Solid State Lighting (SSL) replacements



COB LEDs

LED Lighting Components

Displays & Optoelectronics

3577158573

3859839647

835775905

845068664

Development Tools & Single Board Computers

Raspberry Pi, Arduino, ROCK, STEM Education & Development Tools

Electronic Components, Power & Connectors

Engineering Materials & Industrial Hardware

Pneumatic Counters, Logic Controllers & Timers

Electronics Cleaners & Protective Coatings

Unilite Rechargeable COB LED Work Light, 11.1 V

Cree LED CXB1304-0000-000N0HB430G 3000K 80, 90CRI

RS PRO Rechargeable COB LED Work Light IP65

LEDLENSER Rechargeable COB LED Work Light 3.7 V, IP 54

Cree LED CXB3590-0000-000R0HCB30G 3000K 80CRI

Lumileds COB LEDs

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