High Voltage LEDs using Multi-Junction Technology
The Acrich MJT (Multi-Junction Technology) family of LEDs from Seoul Semiconductor provides designers new options in creating lighting solutions. The proprietary MJT technology enables the creation of high voltage LEDs in traditional packages using only a single die. Previously, designers had to use COB arrays or strings of low voltage LEDs to achieve high voltage operation. MJT shrinks the multiple junctions into a single die decreasing the size of the resulting solution and increasing the light density. High voltage operation allows the use of higher efficiency drivers or even AC drive capability. The high efficacy (120 lumens/watt, warm-white DC operation) and increased light density allow for cost-optimized performance in space-constrained applications.
The familiar package sizes of 2525, 5630, 3528, 4040 and 6540 make it easy to get to production quickly. Available in a wide variety of voltages (13, 22, 32.5, 64) as well as multiple power levels (0.25-1 watt), the Acrich MJT family is now in volume production.
MJT 2525 —a compact high voltage mid-power package with a typical forward voltage of 22V. At 3000 Kelvin (K) and a CRI of 80 it achieves a brightness of 95 lumens (lm) and an efficacy of 105 lumens per watt (lm/W) at an operating current of 40 milliamps (mA) at 25°C. With a lumen density of 15lm/mm2 this midpower package is best in class and has a lumen density five times that of any other midpower package making it ideal for space constrained lighting applications. The wide viewing angle on these LEDs also helps implement the omni-directionality in replacement lamp designs.
MJT3528 — the highest power member of the MJT family is a 32.5V LED that can be driven up to 40 mA. Built into a high power package, this LED generates over 120 lumens at 3000K CCT and over 130 lumens at 5000K CCT at one 1 Watt nominal operating power. With a minimum CRI of 80, standard ANSI binned CCTs, and LM-80 test data, this part meets the critical needs of the general illumination designer.
MJT4040 — the 4040 Acrich MJT is a high-power LED emitting 165 lumens at 20mA with a Vf of 64 volts making it an ideal device for AC and high-voltage DC circuits. Acrich MJTs (Multi-Junction Technology) provide designers high-voltage options without the compromised reliability and large form factors of multi-die chip-on-board solutions.
MJT5630 — the workhorse of the MJT family, this industry standard package is available in 19 or 22V versions in order to optimize to a wide variety of supply sources for optimum efficiency. Efficacy over 110lm/watt (3000K CCT) at full power operation coupled with high CRI, ANSI sub-binned CCTs, and LM-80 data allow for easy fixture certification to Energy Star requirements.
MJT6540 — this product is optimized for operation in the industrial/commercial linear fluorescent replacement market producing 30 lumens at 13V and 20mA drive current. The package size is optimized for light output that replicates that of a fluorescent tube. Available in natural white CCT range (4000K to 6500K), the performance enables a competitive solution against existing T5 and T8 luminaries.
Another Geek Moment:
Seoul Semiconductor Acrich2 LED Modules - View a demo of Acrich2 LED modules from Seoul Semiconductor which use AC line voltage and are available in 4W, 8W, 12W and 16W.
Z5M1 High-Power LEDs - Seoul Semiconductor's Z5M1 series has been optimized to deliver maximum efficacy and luminous flux with an industry-standard 3535 surface-mount package.
3030 Linear LED Modules - Seoul Semiconductor's 3030 linear LED module was developed specifically for troffer, panel, and backlighting products.High-Power COB LED Arrays - Seoul Semiconductor's ZC-Series LED arrays deliver 700 lumens to over 6,000 lumens in a family of 5 devices with efficacies up to 140 lm/watt.