Patent ID: 7884496
Filing Date: 2011-02-08
Classification: H02M

Abstract:
1. A switched-mode power supply, comprising: a first output converter receiving a DC input voltage and generating a first high power DC voltage output and at least one low power DC voltage output; and a second output converter receiving the DC input voltage and generating a second high power DC voltage output coupled to the first high power DC voltage output to generate a coupled output, wherein the first output converter works and the second output converter idles when a transient power of the coupled output is less than a predetermined power level, and both the first and the second output converters work when the transient power is larger than the predetermined power level, wherein the first output converter is a multi-outputs converter, the second output converter is a single-output converter, the at least one low power DC voltage output comprises a first low power DC voltage output and a second low power DC voltage output, and the multi-outputs converter comprises: a first control circuit receiving the first high power DC voltage output and the first low power DC voltage output, and generating a first control signal; a first inverter receiving the DC input voltage and the first control signal, and generating a first AC output voltage; a first transformer having a first primary winding, a first secondary winding and a second secondary winding, wherein the first primary winding is coupled to the first inverter, each of the first and the second secondary windings has a first terminal and a second terminal, the first terminal of the second secondary winding is coupled to the second terminal of the first secondary winding, and the second terminal of the second secondary winding is grounded; a first rectifier coupled to the first and the second terminals of the first secondary winding; a post regulator coupled to the second terminal of the first secondary winding and generating the second low power DC voltage output; a first filter coupled to the first rectifier and generating the first high power DC voltage output; and a second filter coupled to the first rectifier and generating the first low power DC voltage output.