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Some Considerations for Designing an LED PCB

Designing an LED PCB is a process that requires some standards and rules to be followed.

Here is what it takes to design an LED PCB:

Component Placement: the right component placement is what it takes to design an efficient LED circuit board.

Placing the right component at the right spot is crucial in PCB designing.

Along with LEDs, an LED PCB contains other components such as connectors, resistors, and thermistors, which need to be placed at a suitable distance from each other.

The creepage (the shortest distance between two components) and the clearance (distance measured through the air) should be considered when designing an LED PCB to avoid damaging consequences such as overvoltage.

PCB Material: choosing the right material for your LED PCB is challenging because there are multiple materials available in the market, and each has its own pros and cons.

You’ll need to study their merits and demerits to find out which material is suitable for your application.

You might need professional help for it, and the best place to go to is YScircuit.

We provide free and professional suggestions.

Thermal Management: LEDs and other components placed on the PCB will certainly dissipate heat energy, and if that energy is not channeled the right way, then it might end up damaging your circuit board.

The addition of vias and heat sinks will allow you to manage the heat energy present within the board.

Professionals at PCBONLINE knows exactly what it takes to manage the heat produced by electronic components.

Tracking: tracking is the process of ensuring that no part of the net is left open or is forming a short circuit.

After the components are placed, the process of tracking begins.

The flow of current is also monitored such that it does not contribute to the production of heat energy in the circuit.

FQA

1. The advantages of LED PCB
With the electronic products is more and more smaller and thinner, making it popular to use LED PCB, and there are various advantages with using LED PCB as follows:

• Lightweight, low profile
• dimensional stability
• thermal expansion
• heat dissipation
• Lower cost backlit membrane switch
• Dust and moisture resistant
• Make it easy to integrate into complex interface assemblies
• Efficient low power consumption
• Available in a wide variety of sizes, colors, and intensities
• May be used in silver flex membrane switches and copper flex membrane switches.

There are two main reasons which make the LED PCB be popular in addition to increasing the light output of the fixture with integrating multiple LED components.

1. It’s easy to tune the color function by integrating the LED components with different color temperatures or different colors into the same PCB.
2. It can achieve the various light fixtures to meet different lighting requirements with the boards that have different shapes, sizes and materials.

2. SMD LEDs in your PCB
There are many devices including LEDs on a PCB using surface mounted components.
If the wires are quite thin, through hole components can bend slightly so that it looks cheap from the outside.
If making it right to solder the SMD LED, it will be rigid on the board. What’s more, it can also place the SMD LED behind a screen, and cheaper LED that use a bulb will stick out through the packaging.
So it can place the SMD LED behind a small screen in your packaging to be cleaner for your device.
As you know, many PCBs that contain LEDs are fabricated with multilayer FR-4 substrates, so you need to have a pattern of closely-spaced filled or plated through vias under each component so that it can transmit heat, as well as get to your power and ground layers.

If your LEDs have a small footprint and are surfaced mounted, it can use our vias.
Probably there will be a weak solder joint or even tombstoning because it doesn’t fill or plate over the vias and then solder can wick into the vias during assembly, so the reason why it’s better to just use SMD LEDs on an LED lighting array is that the problem with wicking.
A single LED with decent power output will not lead to damaging to your board because of undue thermal.
However, if you are going to have a system for lighting applications, it will need to suffer from a massive heat for the board that supports your LEDs, and make it hard to cool with traditional methods for the boards.
Because the individual LEDs are too small, you can’t really attach a heatsink anywhere, and a heatsink will block the emitted light anyways.
Because there is a great demand on thermal, the boards with a metal core are usually used in LED lighting applications due to their ability to dissipate a great deal of heat.
In general, aluminum is used for LED lighting applications as the metal core in PCB.
What’s more, aluminum is the most metal used as the core among all the possible metal core PCBs.
As well as copper and iron are used for metal core PCBs.