Patent ID: 9407154
Filing Date: 2016-08-02
CPC Classification: H02M,Y02B

Claim Text:
1. An electrical circuit for providing electrical power for use in powering electronic devices, comprising: a rectifier circuit configured to receive an alternating current (AC) power input signal from an electrical power source and generate a rectified direct current (DC) power signal; a quasi-resonant circuit electrically coupled to the rectifier circuit for receiving the rectified DC power signal from the rectifier circuit and delivering an intermediate DC power signal, the quasi-resonant circuit including a first switching device that is coupled to the rectifier circuit, a diode coupled in series between the first switching device and a first inductor, and a first capacitor that is coupled to the first inductor; a power converter circuit electrically coupled to the quasi-resonant circuit for receiving the intermediate DC power signal and delivering DC output power to an electronic device, the power converter circuit including a transformer and a switching circuit coupled to a top side of a primary side of the transformer for delivering power to the primary side of the transformer, the switching circuit coupled between the quasi-resonant circuit and the transformer and including a second inductor coupled to the quasi-resonant circuit, a second switching device including a field effect transistor (FET) coupled to the second inductor, and a second capacitor coupled between the FET and the top side of the primary side of the transformer; a voltage sensor coupled to the transformer for sensing a voltage level of power being generated by the transformer; and a controller coupled to the voltage sensor and the first and the second switching devices, the controller configured to receive the sensed voltage level from the voltage sensor and transmit a control signal to the first and the second switching devices to regulate the first and the second switching devices to adjust the voltage level of the DC output power being delivered to the electronic device.