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This paper presents a new micro-inverter topology that is intended for single-phase grid-connected PV systems. The features of the proposed topology are: (1) eliminating the double-frequency power ripple using small film capacitor; (2) improving the maximum-power-point tracking (MPPT) performance; (3) using long life-time film capacitors, which will improve the reliability of the inverter; and (4)...
Synchronous rectification offers an effective solution to improve efficiency of low-output-voltage flyback converters. Conventional synchronous flyback topologies using the discrete synchronous rectifier face challenges in precise timing control on the secondary side at high switching frequency. In this paper, we demonstrate the MHz-frequency operation of a flyback DC-DC converter using a new monolithic...
In this paper, we report a concept of integrating a monolithic buck converter power IC with in-package bondwire inductors. The power IC was designed and fabricated with a standard 0.5μm CMOS process. Multi-turn bondwires with and without ferrite epoxy glob cores are used as the filter inductor in the buck converter. A 2.5V/120mA prototype system in package (SiP) buck converter is built to operate...
The purpose of this paper is to comprehensively investigate the performance perspectives and theoretical limitations of trench power MOSFETs in synchronous rectifier buck converters over a wide range of operating conditions. Several trench MOSFET technologies are investigated using a mixed-mode device/circuit modeling approach. Individual power loss contributions from the control and synchronous MOSFETs,...
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