During our production, we will produce some SMD LED or DIP LED with one single chip inside or multi chips inside. For multi chips LED, they will got different chip and wavelength inside the package. Why we put two same LED chips Inside one package?
At first glance, putting two LED chips in a single package might seem unnecessary. Why not just use two separate LEDs?
The answer comes down to performance, cost, and practicality – especially for high‑power applications like 1W yellow LEDs.
Here are the key reasons.
1. Higher Brightness Without a Larger Footprint
A single standard LED chip typically handles 20‑60mA. To get 350mA of drive current, you cannot simply push one chip that hard – it would overheat and fail quickly.
By placing two chips inside one package, you split the current between them. Each chip runs comfortably within its safe range, while the combined output delivers much higher total brightness – all in the same physical space as a single LED.
Result: More light, same board footprint.
2. Better Thermal Management
Heat is the enemy of LED lifetime. One chip running at 350mA would get extremely hot. Two chips running at 175mA each generate less heat per chip – and the heat is spread across a larger die area.
With a proper package design (e.g., a bottom heat sink or thermal pad), the dual‑chip configuration runs cooler and lasts longer than a single overdriven chip.
Result: Longer life, more reliable operation.
3. Simplified Assembly and Lower Cost
If you need the light output of two chips, you could mount two separate 60mA LEDs on your PCB. But that means:
Two pick‑and‑place operations
Twice the soldering points
More board space
Potential mismatch between two discrete components
A single dual‑chip package places once, solders once, and takes up less space. Your assembly cost goes down – not up.
Result: Lower manufacturing cost, simpler BOM.
4. Better Optical Consistency
When you use two separate LEDs, their brightness and color can vary slightly – especially if they come from different bins or are placed at slightly different angles.
A single package with two chips from the same production lot, mounted side by side on the same submount, gives uniform output. The light appears as one smooth source, not two overlapping spots.
Result: Better light quality, no visible "splitting."
We put two chips inside one package because it gives you:
More light from the same space
Better heat handling for longer life
Lower assembly cost with fewer components
Consistent optical performance batch after batch
It is not just a technical trick – it is a smarter way to build high‑power LEDs without asking you to redesign your production line.