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PRIMARY ONLY CONSTANT VOLTAGE/CONSTANT CURRENT (CVCC) CONTROL IN QUASI RESONANT CONVERTOR
PRIMARY ONLY CONSTANT VOLTAGE/CONSTANT CURRENT (CVCC) CONTROL IN QUASI RESONANT CONVERTOR
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机译:准谐振转换器中的主要恒压/恒流(CVCC)控制
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摘要
A power supply apparatus and method of regulating is provided. A converter circuit includes a primary switching element and an auxiliary switching element. The auxiliary switching element is for transferring a reflected voltage signal. A transformer includes a primary and a secondary, the primary is coupled with the converter circuit. The primary and the secondary each comprise a single winding. An output rectifier circuit is coupled with the secondary of the transformer. A resonant circuit is included in the converter circuit and is coupled with the primary. The resonant circuit includes one or more resonance capacitors that are configured for providing a transformer resonance. The transformer resonance comprises the reflected voltage signal, the capacitance of the one or more resonance capacitors and a parasitic capacitance of the transformer. The reflected voltage signal is reflected from the secondary to the primary. A current feedback circuit is coupled between the primary and a controller. A virtual output current feedback loop is provided for regulating an output current using the reflected voltage signal.
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