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Efficient power delivery architecture is gaining more attention in the design of future generations of data centers in order to minimize the ever increasing trend of power consumption. Silicon-based power delivery architectures and designs have already reached a level of maturity in terms of efficiency and density. Recent studies indicate that 48-V voltage regulator modules (VRMs), instead of 12-V...
The two-stage 48V-12V-1.8V Voltage Regulator Module (VRM) structure is gaining more and more attention in high-end server applications. The LLC converter is the preferred choice for the first conversion stage because it provides the isolated 12V output efficiently, which is then converted to 1.8V by the multi-phase Buck converter. Since the CPU works in sleep-mode most of the time, the light load...
The light load efficiency has drawn more and more attention for the LLC resonant converters. And the high frequency LLC converters are emerging in recent years. The conventional burst mode control cannot fix to the efficiency-optimal state during the burst-on time. Optimal Trajectory Control (OTC) for burst mode can solve this problem by using fixed 3-pulse pattern; however, the burst operation range...
This paper illustrates the low light load efficiency issue of a coupled inductor laptop voltage regulator (VR). Solutions to solve this low light load efficiency issue are investigated. Experiments are implemented and the proposed solutions are verified by the experimental results. They are promising solutions for the future of laptop VRs.
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