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With the advent of battery-powered portable devices and mandatory adoption of power factor correction, noninverting buck-boost converters are garnering lots of attention. Conventional two-switch or four-switch noninverting buck-boost converters choose their operation modes by measuring input and output voltage magnitude. The criterion for the selection of the operation mode can cause higher output...
The duty cycle of the conventional multi-phase buck converter becomes extremely small as the output voltage becomes lower and lower. This is a severe challenge as the switching frequency goes up. This paper presents a power circuit architecture to improve the efficiency of the laptop computer CPU Voltage Regulator (VR) by extending the duty cycle while improving the dynamic performance as well. The...
This paper presents a novel voltage regulator with sine waves, which only consists of 3 switch devices in 3 phases configuration. Simplest chopper control is adopted to operate the system in quasi-zero switch state (quasi-ZCS switching on and quasi-ZVS switching off) by means of reasonable parameter-match without zero-switching branch circuit assisted. Analyses and experiment results are presented...
In order to enhance the performance of ARCPI (auxiliary resonant-commutated pole inverter), this paper proposes a novel ZVS-ZCS inverter with pulse current feedback transformer auxiliary commutation to solve the problem such as extra losses from auxiliary circuit, variable commutation duration, and poor reliability, which are common in existing ARCPIs. In this novel ARCPI, the application of commutation...
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