Corsair, a leader in parts and components for PCs and laptops, announced the release of their last PSU (Power Supply Unit), the AX1600i. This 1600W power supply is mainly targeting gamers PCs. The 1.6kW power is large enough to supply a Desktop PC with a large microprocessor and several energy consuming graphic cards.

The real innovation in this specific PSU is that it’s using GaN based semiconductor:

The AX1600i uses Transphorm’s TPH3205WS 650V FETs in a bridgeless totem-pole power factor correction (PFC) topology. The boost PFC stage is then very efficient and taking the most of GaN technology. They replace Silicon SuperJunction MOSFETs that were used in previous Corsair power supplies topologies in a 2-phased interleaved PFC topology, less efficient. The power supply is now placed at a more than 80 PLUS Titanium rating.

Corsair Power supply unit for desktop gamer PC GaN gallium nitride devices

Courtesy of http://www.tomshardware.com/

Corsair choose Transphorm as it seems to be the best options for volume production and matching the characteristics and topology they were aiming at. They come in TO247 package, similarly to most SuperJunction MOSFETs. The semiconductor start-up has been fully involved in the design and test process to reach the results presented now.

Courtesy of http://www.tomshardware.com/

The AX1600i is already available and priced at USD499.

Here are some of the main improvements advertised by Corsair:

  • Power output: 1600W, 6.5% increase
  • Size reduction: 20 mm shorter, 11% smaller
  • Thermal impact: equivalent 50°C continuous output
  • Audible noise impact: slower fan speed, less noise at full load

GaN was expected to be used in consumer power supplies:

This news is totally in line with PntPower market and technology analysis and publications: The best fitting market segment for GaN today is within power supplies. We expected to see more laptop power supplies and desktop power supplies, but only the power range changes.

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