Monolithic integration of an active asynchronous voltage clamp with a 12V/3A full bridge synchronous rectifier

Windels, Jindrich; Monté, Ann; Doutreloigne, Jan

doi:10.1109/pedes.2012.6484343

Cited by 2 publications

(1 citation statement)

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“…The control of the auxiliary DC/DC converter is independent from the main converter. Thus, small magnetic components can be used because of operating at a higher switching frequency than the main switch [8], [9].…”

Section: Introductionmentioning

confidence: 99%

A Study on Implementing a Phase-Shift Full-Bridge Converter Employing an Asynchronous Active Clamp Circuit

Lee¹,

Kim²,

Kim³

et al. 2014

Journal of Power Electronics

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The conventional Phase-Shift Full-Bridge (PSFB) converter has a serious voltage spike because of the ringing between the leakage inductance of the transformer and the parasitic output capacitance of the secondary side rectifier switches. To overcome this problem, an asynchronous active clamp technique employing an auxiliary DC/DC converter has been proposed. However, an exact analyses for designing the auxiliary DC/DC converter has not been presented. Therefore, the amount of power that is supposed to be handled in the auxiliary DC/DC converter is calculated through a precise mode analyses in this paper. In addition, this paper proposes a lossy snubber circuit with hysteresis characteristics to reduce the burden that the auxiliary DC/DC converter should take during the starting interval. This technique results in optimizing the size of the magnetic component of the auxiliary DC/DC converter. The operational principles and the theoretical analyses are validated through experiments with a 48V-to-30V/15A prototype.

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Section: Introductionmentioning

confidence: 99%