Circular emitter LEDs for beam-forming

Cree has unveiled two new circular emitter LEDs—engineered without over-die lenses—designed specifically for beam-forming applications. Offered in colour temperatures of 5,000K, 5,700K, and 6,000K, these LEDs expand Cree’s popular XP family with precise optical control and robust thermal performance.

Both new models—XP-LR and XP-GR—share the familiar 3.45 x 3.45mm XP footprint. The XP-LR features a 1.7mm diameter emitter, while the XP-GR has a smaller 1.3mm emitter. Each LED supports a maximum drive current of 6A, delivering luminous flux of up to 1,629 lm (XP-LR) and 1,202 lm (XP-GR) at 85°C.

Key performance specs:
    •    XP-LR (1.7mm emitter):
    •    Typical forward voltage: 3V at 2A, 85°C (max 3.2V)
    •    Viewing angle: 125°
    •    Minimum luminous output at 2A: 730 lm at 85°C (122 lm/W), 808 lm at 25°C
    •    Thermal resistance (junction to solder point): 0.8°C/W
    •    Thermal derating begins at ~15°C for a 7°C/W system, or up to 132°C/W for 1°C/W, with output dropping to zero at 150°C
    •    XP-GR (1.3mm emitter):
    •    Typical forward voltage: 2.91V at 1.5A, 85°C (max 3.15V)
    •    Viewing angle: 125°
    •    Luminous output bins at 1.5A: 440 or 510 lm at 85°C (100–117 lm/W), or 499 to 578 lm at 25°C
    •    Thermal resistance: 1.3°C/W
    •    Derating starts at ~0°C for an 8°C/W system, or 115°C/W for 2°C/W, also reaching zero at 150°C

These new emitters are optimized for applications requiring directional lighting and high efficacy, while offering consistent thermal reliability in compact designs.