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A 3-level buck converter in the discontinuous conduction mode (DCM) is a key circuit for integrated voltage regulators to achieve high efficiency at a light load in the stand-by mode operation of microprocessors. In this paper, fundamental circuit characteristics including the conversion ratio and transfer function are derived for the first time, enabling the design of controllers for 3-level buck...
The emerging trend of internet of things (IoT) and artificial intelligence (AI) technologies will bring about a major change in power electronics and create a new generation of the power electronics (Power Electronics 2.0). To enable the IoT- and Al-assisted Power Electronics 2.0, the integration of the sensors, the programmable hardware, and VLSIs for the controller into the power devices/modules...
The operation of a distributed maximum power point tracking (DMPPT) photovoltaic (PV) system with a current source inverter (CSI) is confirmed. We proposed a current-linked distributed PV system instead of a voltage-linked one. All the previous studies of DMPPT PV systems use a voltage source inverter (VSI). Moreover, all commercial power optimizers that are provided by Solar Edge, Solar Magic, Tigo...
Frequency characteristics of the total feedback loop of a current-mode buck DC-DC converter in the discontinuous conduction mode (DCM) are examined by formulating an equivalent small-signal transfer function using a proposed block structure that does not suffer direct influence from the current feedback. Utilizing this transfer function, it is clarified that the type of the compensation slope in a...
We propose a fast and precise simulation method for replicating the transient responses and frequency characteristics of switching power converters using a mixture of real circuits and behavioral models. The method used a behavioral simulation tool (Verilog-A), which was supported by an analog simulator such as SPECTRE®. The time-step became variable, however, the nonlinear operation of the circuit...
The 1-V operation of a passive sigma-delta modulator has been realized. The dc voltage in the signal paths in the second-order switched capacitor filter section was set at 0.2 V so that metal-oxide-semiconductor (MOS) switches in the signal paths would have enough gate-to-source voltage to turn on without using a voltage boosting scheme. The input switch was replaced by a passive resistor to avoid...
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