In the most cases, several LEDs will be designed to work in series. Drive current for these LEDs is the same, but forward voltage for each LED is not. For example, the forward voltage of standard white LED in the market is generally ranged in 2.8 ~ 3.4 V at rated 60mA current. Therefore, a maximum 21% difference on power consumption of each LED will be generated if no consideration on voltage bin of the LED. This design will reduce the long-term stability of the LED PCB. Forward voltage bins and LED drive current can be difficult to manage in production. Whether you would like to implement a constant voltage or constant current topology, or are not sure, we can help. We handle current limiting resistor specification pairing, so that you can simply specify a constant voltage level and desired current draw. We ensure that each of our 0.1V bin-range LEDs will be used in a single panel or product, and ensure all of LEDs in a panel work at the same operating environment. This will greatly improve the long-term stability of the light fixture.
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Looking for a high CRI, warm-white / daylight-white tunable circuit board design? Looking to maximize on lumens per dollar? Wondering if your LED density is sufficient, or if it might cause “spotting?” Need lumens per foot? Need 100 lumens per foot? We have you covered. Our experienced engineering team can provide recommendations and quickly provide schematic and design charts to optimize based on your requirements. We also have a variety of connector and other components to help integrate into power supply systems
Light come from your fixture is a mixed light between direct transmission light and indirect transmission light. Generally, the color indirect transmission light is slightly different from direct transmission light due to inconsistent absorption characteristic against wavelength of the soldermask of the PCB board. Therefore, if you need the accurate light from the fixture, the absorption characteristic of the PCB board, even diffuser must be considered. With YUJI’s professional custom spectrum technology, we can easily help you to improve the color accuracy at LED level avoiding the work of finding right PCB board or diffuser.
If you've ever taken apart a flashlight or a smart light, you've probably seen a printed circuit board (PCB) with tiny LEDs on it. Those are usually mass-produced, but sometimes off-the-shelf doesn’t cut it. That’s where custom LED PCBs come in.
So what does it actually take to make one of these boards from scratch? Let’s walk through it.
It All Starts With the Design
The first step is designing the board layout. Engineers figure out where the LEDs should go, how the power will flow, and how to manage heat. That last part is a big deal. LEDs get hot, and custom LED PCBs are often used in high-performance lighting, where good thermal management is critical.
Building a Prototype
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Once the design is ready, a prototype is built. This stage helps work out any quirks before going into full production. Maybe the LED placement needs adjusting, or maybe the power distribution could be cleaner. The prototype is where those details get sorted.
It’s also where clients can make tweaks to fit the specific needs of their product. Some projects require dimming options, sensors, or boards shaped to fit into tight spaces. Prototyping gives room to figure all that out.
Fabrication and Assembly
Now it's time to actually make the board. Copper layers are etched with the circuit pattern, and everything gets laminated together. For boards with aluminum backing, a special insulating layer goes between the copper and the metal to keep things safe but still allow heat to move.
Once the board is fabricated, it’s ready for components. Machines (or sometimes steady human hands) place each LED and part exactly where it belongs. Then the whole thing is heated in an oven to melt the solder and lock everything into place.
Testing It Out
Before anything ships out, the board is tested to make sure it works like it should. This can include checking LED brightness, verifying connections, and running heat tests to confirm everything stays cool under pressure.
Contact us to discuss your requirements of Smd. Our experienced sales team can help you identify the options that best suit your needs.