Infographic Highlights the Challenges of Powering Modern Processors

May 4, 2016

Powering modern CPUs and Graphics Processors presents an array of challenges to the power systems designer as shown by the infographic below:


CPU Power Delivery Challenges


Engineers are faced with increasing power demands from CPUs and GPUs, and with supply voltages only getting lower, this means higher and higher currents are drawn by these semiconductors. The design isn’t made any easier with “keep out” areas where power components cannot be placed: with anything but the smallest converters, this means that the distance from the converter to the device causes tangible I2R losses.

Losses in the PCB traces also occur between the main energy storage and the point-of-load converters. Raising the voltage used to supply the PoL power components will reduce the I2R losses and the size of the capacitance with the square of the voltage increase, resulting in significant reductions in cost and increases in efficiency.

Raising this voltage, however, requires a larger step-down ratio. With some converters this is not possible without compromising the overall efficiency and potentially introducing signal integrity issues as the interference the power conversion generates is increased.

Vicor’s 48 V direct to processor solutions overcome these challenges without any drawbacks such as reduced conversion efficiency or increased noise.


An Alternative to Conventional Multiphase Processor Power Systems

Our solutions are able to cope with the most demanding requirements, offering scalability from 50 A to 400 A using a factorized power architecture. They offer full digital control and this solution can be combined with ZVS Buck Regulators to provide support for any lower current rail for auxiliary devices.

For more information, check out our 48 V Direct to CPU resources page.


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