Summary of Surface-mount array takes on medium-power lighting LEDs
Cree's new MH-B is a multi-die surface-mount LED designed to replace single-die medium-power LEDs in automated luminaire manufacturing. It combines high-power reliability with CXA array simplicity, featuring a ceramic package for superior thermal durability. This allows operation at higher temperatures (up to 105°C) with smaller heatsinks while maintaining long life. The 5x5mm component offers flexible color temperatures and CRI options, delivering up to 830 lm at peak drive currents.
Parts used in the Cree MH-B Lighting Project:
- Multi-die 500 lm surface-mount lighting LED
- Ceramic package
- Heatsink
- Bolt-down multi-die chip-on-board modules
Cree has introduced a multi-die 500 lm (80CRI, 3,000K) surface-mount lighting LED, aiming to compete against multiple single-die medium-power LEDs in automated luminaire manufacture.
The idea is analogous to the way bolt-down multi-die chip-on-board modules (CoBs) are taking-on single-die LED boards in manual assembly lighting manufacture.
Named MH-B, the new LED “combines the reliability and manufacturability of Cree’s high power LEDs with the simplicity and performance of our CXA LED arrays,” claimed Cree marketing director Paul Thieken. “MH-B introduces a technology platform that gives customers the best of both technologies, while avoiding the limitations of mid-power LEDs.”
In an attempt to keep system cost down, the Cree part can operate at higher than usual temperatures allowing smaller heatsinks to be employed. According to Cree, it’s MH-Bs can deliver better life at 105°C than some medium power LEDs operating at 85°C.
This said, it is specified and binned at 85°C.
Key to high temperature durability is a ceramic rather than plastic package.
The package is 5x5mm, with 5.5°C/W thermal resistance, and can be driven up to 175mA (~7W) where output is around 35% up on the 120mA value. Claimed all-guns-blazing output is 830 lm.
Typical forward voltage is 37V (120mA (4.4W) 85°C), and 42V maximum (120mA 25°C).
Colour temperatures between 2,700 and 6,500K are available, and there are CRI options including 90.
For more detail: Surface-mount array takes on medium-power lighting LEDs
- What is the primary purpose of the Cree MH-B LED?
The MH-B aims to compete against multiple single-die medium-power LEDs in automated luminaire manufacture. - How does the MH-B compare to bolt-down CoBs?
The idea is analogous to how bolt-down multi-die chip-on-board modules are taking on single-die LED boards in manual assembly lighting manufacture. - Can the MH-B operate at higher than usual temperatures?
Yes, the part can operate at higher than usual temperatures allowing smaller heatsinks to be employed. - Why is the ceramic package important?
Key to high temperature durability is a ceramic rather than plastic package. - What is the maximum output claimed for the MH-B?
Claimed all-guns-blazing output is 830 lm when driven up to 175mA. - Does the MH-B offer different color temperature options?
Colour temperatures between 2,700 and 6,500K are available. - Are there specific CRI options for this LED?
There are CRI options including 90. - What is the thermal resistance of the package?
The package has 5.5°C/W thermal resistance.
