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This paper presents an MHz LLC resonant converter with load-regulating capability. Unlike the two-stage solution, most of input power is delivered to the load directly by the main transformer in the proposed topology. Moreover, only small portion of input power is converted by two stages: 1) auxiliary transformer and 2) a cascaded PWM dc–dc converter. Therefore, the sacrifice of the efficiency caused...
The interleaving technique is necessary for multiphase LLC resonant converters in high output current high power level applications. But the conventional frequency-controlled LLC converters will lose current sharing if all the phases are operating at the same switching frequency. In this paper, a two-phase interleaved LLC-Regulated DCX (LLC-RDCX) with parallel PWM output regulation is presented to...
This paper proposes a parallel output regulation method for isolated resonant DC transformer (DCX). With an auxiliary transformer in series with the main transformer at primary side and independent at secondary side, the DCX creates an additional output which feeds the cascaded PWM DC-DC converter. Because the output of the DC-DC converter is parallel with main output, the output voltage is regulated...
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