Auroras Lighting Fully Adopts the New Generation of COB LED Light Sources

Advantages of COB (Compared with SMD and HP)

COB, or Chips on Board, integrates multiple LED chips into a single lighting module. COB LEDs offer significant advantages, including low thermal resistance, a larger heat dissipation area, better lighting effects, and higher luminous efficiency.

1. COB LEDs Have Low Thermal Resistance
   Among various LED components such as high-power LEDs (HP), SMDs, DIPs, etc., COB LEDs have the lowest thermal resistance and the best heat dissipation.

1. Packaging of High-Power LEDs (ab. HP)
   The total thermal resistance (Rth-total) of high-power LEDs is the sum of the thermal resistances of the die-attach adhesive, heat sink, thermally conductive grease, and PCB.
   Rth-total = Rth-1 + Rth-2 + Rth-3 + Rth-4

2. Packaging of COB LEDs
   The total thermal resistance of COB LEDs is the sum of the thermal resistances of the die-attach adhesive and ceramic substrate, without the need for a heat sink or thermally conductive grease. Rth-total = Rth-1 + Rth-4. COB LEDs have low thermal resistance. Heat generated from the LED chips can be effectively conducted outward, enhancing the reliability and lifespan of the LEDs.

3. Comparison of Thermal Resistance

2. COB LEDs Offer Better Lighting Effects