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The half-bridge (HB) LLC converter has been widely used in medium power applications because of low component count, no transformer dc-offset current, and wide zero-voltage-switching (ZVS) range. However, the HB LLC converter should be designed with small transformer magnetizing inductance to obtain high voltage gain in wide-input-voltage applications with the hold-up time conditions. It causes the...
The resistive switching (RS) phenomenon refers to the reproducible switching between a high resistance state (HRS) and a low resistance state (LRS) observed in a metal/oxide/metal (MOM) configuration [1]. The RS effects in binary oxide materials such as NiO, TiO2, and TaOx has been studied intensively for their potential applications in nonvolatile resistive random access memory (RRAM) due to their...
This paper describes the design of a 48 kJ/s high-voltage capacitor charging power supply (CCPS), focusing on its efficiency, power density, and reliability. On the basis of a series-parallel resonant converter (SPRC) that provides high efficiency and high power density owing to its soft-switching, the design of the CCPS is explained in detail, including its input filter, resonant tank parameters,...
A 2×2 MIMO(multi-input multi-output) for m-WiMAX (IEEE 802.16e) / WLAN (IEEE 802.11n), multi-mode / wideband transceiver system was developed. To design the transceiver system, the RF architecture was redesigned for the overall system, and a MIMO antenna, quad-band switchable front-end module (FEM), and reconfigurable RFIC were developed. Using embedded PCB technology, the transceiver system was integrated...
This paper represents a novel short-circuit detecting scheme using turn-on switching characteristic of IGBT. The proposed scheme has a simple protection circuit, fast fault detection time, and low-cost devices to protect IGBT under short-circuit faults such as fault under load (FUL) and hard switching fault (HSF). The proposed short-circuit detecting scheme using turn-on switching characteristic of...
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