Why does an LED PCB need a heat sink?

The supplier whom I ordered LED PCB design is asking details of LED heat sink, but actually we have no idea about it. Why does an LED PCB need a heat sink? This is a new project for our house supplies brand. Any tip can inspire us?

LEDs cannot suffer high temperatures. Most of the energy wasted by an incandescent bulb is radiated away from the filament as infrared energy, and since the filament operates at a white-hot temperature, the bulb is made to withstand that temperature.

LEDs have to be operated at a much lower temperature, and all of the waste heat is removed by conduction and convection, which requires a heatsink.

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Oliver Smith

Oliver Smith

Oliver is an experienced electronics engineer skilled in PCB design, analog circuits, embedded systems, and prototyping. His deep knowledge spans schematic capture, firmware coding, simulation, layout, testing, and troubleshooting. Oliver excels at taking projects from concept to mass production using his electrical design talents and mechanical aptitude.
Oliver Smith

Oliver Smith

Oliver is an experienced electronics engineer skilled in PCB design, analog circuits, embedded systems, and prototyping. His deep knowledge spans schematic capture, firmware coding, simulation, layout, testing, and troubleshooting. Oliver excels at taking projects from concept to mass production using his electrical design talents and mechanical aptitude.

What Others Are Asking

How do you handle a PCB that didn’t print correctly?

I did have one board come back with a manufacturer error – an extra bit of copper just a hair’s width across hidden underneath a component. It looked almost like someone’s eyelash had fallen onto the board just before photo etch. How should I deal with it?

Do modern LED lights use thermal vias?

I have a technical question about thermal management with mid-power LED diodes.Do you use thermal vias on the PC board anymore? Either under the LED diode footprint or even around the footprint?
Depends on the application limits and cost targets.

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