Patent ID: 8587965

Claim:
A current-input-type parallel resonant DC/DC converter, comprising: an inverter circuit, for converting an input DC signal into a positive and negative alternating square wave current; a resonant network, for converting the positive and negative alternating square wave current into a sine-voltage; a transformer, for realizing an isolation of power transmission; a full-wave rectifier circuit, for rectifying the sine-voltage; and an output filter circuit, for producing a DC output-voltage, wherein the inverter circuit is connected to both terminals of a primary side of the transformer through the resonant network connected in series with the inverter circuit, a common-polarity terminal of a first winding at a secondary side of the transformer and an opposite-polarity terminal of a second winding at the secondary side of the transformer are respectively connected to an input of the full-wave rectifier circuit, and an output of the full-wave rectifier circuit and a center-tap terminal at the secondary side of the transformer are respectively connected to an input of the output filter circuit, wherein the resonant network only comprises: a resonant inductor; and a resonant capacitor connected with the resonant inductor and the both terminals of the primary winding of the transformer in parallel, wherein there is no series inductive element between the inverter circuit and the parallel-connected resonant inductor and capacitor in the resonant network.