Summary of Cree squeezes 13W LED into XPH35 3.5×3.5mm package
Cree introduces the XHP35 series, a 3.5×3.5mm four-junction LED delivering up to 1,800 lumens at 1.05A and 700 lumens at 350mA with high efficacy. Available in High Density and High Intensity versions with various CRI options, this single-die device features a nominal 12V forward voltage to simplify power supply design for applications like stadium, torch, and high bay lighting.
Parts used in the XHP35 Series:
- XHP35 four-junction LED die
- XP dome lens (High Density form)
- Lens-less package (High Intensity form)
Cree has added 50% more light output to its 3.5×3.5mm ‘XP’ format with the introduction of the four-junction XPH35 series.
Something like 1,800 lm is available with the device turned up to its absolute maximum of 1.05A, when it typically drops something over 12.3V (~140 lm/W). At the specified current of 350mA (Vf ~11.3V) output of the highest cool white bins in the data sheet is around 700lm – 177 lm/W.
The company states 2.4x output increase for the 3x jump from 350mA to 1.05A. All the above figures appear to be at 85C, and the die is rated up to 150C.
The device has a single die, with four LED junctions arranged in a square – as opposed to the stacked multi-die used in some of Osram’s infra-red offerings.
Upping forward voltage to a nominal 12V eases cpower supply design.
Devices are available in ‘high density’ form with the typical XP dome lens, or for those battling etendu to make narrow beams, in a ‘high intensity’ lens-less form.
“The XHP35 High Intensity LED is optimised to deliver maximum candela through secondary optics to boost performance and reduce size for applications requiring high light intensity, such as stadium, torch and track lighting,” said the firm. “The high density LED delivers new levels of light output for applications such as outdoor and high bay lighting.”
Whites are available in either 70, 80 and 90 CRI
For more detail: Cree squeezes 13W LED into XPH35 3.5×3.5mm package
- What is the maximum light output of the XHP35?
The device can deliver approximately 1,800 lumens when driven at its absolute maximum current of 1.05A. - How does the output change between 350mA and 1.05A?
The company states there is a 2.4x output increase when jumping from 350mA to 1.05A. - Does the XHP35 use multiple stacked dies?
No, the device has a single die with four LED junctions arranged in a square. - What are the available CRI options for white lights?
Whites are available in either 70, 80, or 90 CRI. - Can the XHP35 be used for narrow beam applications?
Yes, the High Intensity lens-less form is optimized to make narrow beams for applications like stadium and track lighting. - How does the forward voltage affect power supply design?
Upping the forward voltage to a nominal 12V eases power supply design. - What is the typical efficiency at the specified current of 350mA?
At 350mA, the highest cool white bins achieve around 177 lm/W. - What temperature rating does the die have?
The die is rated up to 150C, with figures typically measured at 85C.
