Laptops get green power cut

Marvell has announced new digital power technology to lower PC and notebook power consumption. The company supplies OEMS making PC and notebook power supplies.

The new chips are digital signal processors (DSPs) which dynamically adapt power characteristics in real time for power supplies and power adapters for PCs and notebook computers by better controlling the AC-DC current switching needed.

The digitalization of power supplies has been talked about for some time.

Digital signal processing involves digitizing an input analogue signal, such as a sound stream, modifying its digital profile in real time to produce a desired characteristic, such as enhanced bass notes, and then feeding the modified sound stream to a device, such as a loudspeaker, and producing a better outcome.

With Marvell’s power factor correction (PFC) technology, incoming electric current to a PC or notebook has its profile modified through a DSP chip. It determines the amount of power required for users’ applications that keeps the peak current at the lowest level, improving energy efficiency.

Marvell-based notebook adapters are approximately one-third smaller and lighter than current notebook adapters. This is because the new components can replace up to 20 individual parts used currently and so simplify power supply design as well as increasing power efficiency.

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