Semiresonant Half-Bridge Zeta Converter With Reduced Turn-OFF Currents for High-Efficiency Power Supply
- Baek, Jaeil; Kim, Chong-Eun; Lee, Jae-Bum
- Issue Date
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Capacitors; Switches; Switching loss; Zero voltage switching; Power supplies; Shape; Inductors; Half-bridge (HB) zeta converter; reduced peak current; resonant operation; reverse-recovery loss; turn-< sc xmlns:ali=" http:; www; niso; org; schemas; ali; 1; 0; " xmlns:mml=" http:; www; w3; org; 1998; Math; MathML" xmlns:xlink=" http:; www; w3; org; 1999; xlink" xmlns:xsi=" http:; www; w3; org; 2001; XMLSchema-instance" > off < ; sc > switching loss; wide-input-voltage range
- IEEE TRANSACTIONS ON POWER ELECTRONICS, v.35, no.5, pp.4547 - 4557
- Journal Title
- IEEE TRANSACTIONS ON POWER ELECTRONICS
- Start Page
- End Page
- This article presents a semiresonant half-bridge zeta (HBZ) converter for high-efficiency power supply. Since the proposed converter utilizes a primary inductor and secondary capacitor as a resonant tank, it can make a resonant operation during the <sc>on</sc>-state of a low-side primary switch. Therefore, the proposed converter can effectively reduce turn-<sc>off</sc> currents of the low-side primary switch and the secondary diode without any additional component and control scheme, which decreases turn-<sc>off</sc> switching loss and reverse-recovery loss. Moreover, the proposed converter can maintain advantages of the conventional HBZ converter such as high input/output (I/O) voltage gain and wide zero-voltage-switching (ZVS) range with the proposed design procedure. As a result, the proposed converter can improve its efficiency over the entire load conditions compared to the conventional HBZ converter. A 250 & x00A0;W, 300 & x2013;400 & x00A0;V input, and 56 & x00A0;V output prototype has been built and tested to verify the effectiveness of the proposed converter.
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