GreatWall taps Navitas for 2.5kW AI datacentre power supply
GreatWall in China is to use the GaNSense power devices from Navitas Semiconductors for a 2.5kW high power density DC-DC converter for AI datacentres.
The quarter brick 2.5kW DC-DC converter has a power density of 92.36W/cm³, eight times higher than the output power of traditional silicon designs. The GaNSense NV6169 650V, 45 mΩ, transistor and gate driver achieves a half-load efficiency of 97.9% and a wide input range of 320-420 VDC to meet the increasingly stringent efficiency guidelines and regulations from Open Compute Project (OCP).
The loss-less current sensing and the world’s fastest short-circuit protection, with a ‘detect-to-protect’ speed of only 30 ns, six times faster than discrete designs. This allows the design to provide 50% more power than prior designs in an industry-standard, low-profile, low-inductance, 8 x 8 mm PQFN package for high-efficiency, high-density power systems.
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The roll out of higher power GPUs in AI datacentres is driving the move to 400V architectures. Smaller modules with higher efficiency and greater independence free up valuable cabinet space, directly enhance computing power and reduce energy consumption.
Although the NV6169 is rated at 650V for nominal operation it has an 800 V peak-rating for robust operation during transient events. The GaN gate is fully-protected and the whole device rated at an industry-leading electrostatic-discharge (ESD) specification of 2 kV.
“With its faster switching frequency and higher efficiency, GaN has become a key factor in unlocking the next generation of power supplies. We are very pleased to collaborate with Navitas, an industry leader in GaN technology, and successfully enable this industry-leading ultra-high-power density and ultra-high efficiency DC-DC converter,” said Michael Zhang, head of DC Product Line at Greatwall Power.
“We look forward to deepening our collaboration with Navitas to unlock the application of GaN in more fields, continuously improve power supply efficiency to reduce energy consumption, and accelerate the low-carbon transformation of various industries.”
“Navitas firmly believes that continuous cooperation with Great Wall will make GaN technology shine in multiple fields such as AI data centers and telecommunications and promote the industry to develop towards a more efficient and environmentally friendly direction,” said Charles Zha, SVP and GM of Navitas Asia-Pacific.
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