Silergy Semiconductor Technology (hangzhou) Ltd

Xiahe Zhang

Jian Deng

Qiukai Huang

A switching power supply circuit can include: a transformer having a primary winding and a secondary winding; a resonant capacitor and a resonant inductor coupled in series with the primary winding to form a series structure; a power switch module receiving an input voltage and connecting two terminals of the series structure to form a resonance circuit; an output rectification module coupled to the secondary winding and generating an output voltage; an operating mode control module receiving the input voltage and the output voltage, to control the output rectification module such that the switching power supply circuit is operated in the LLC mode or the AHB mode based on a ratio of the input voltage and the output voltage relative to a predetermined value.

Switching power supply circuit

A control circuit for a resonant converter having at least two output signals, the control circuit including: a charge feedback circuit configured to generate a charge feedback signal representing a resonant current of a resonant circuit in the resonant converter; and a switching control signal generating circuit configured to generate switching control signals according to the charge feedback signal and feedback signals representing error information of each of the at least two output signals.

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Hangzhou, China

Xiahe Zhang