Patent ID: 9531255
Filing Date: 2016-12-27
CPC Classification: H02M,H05B,Y02B

Claim Text:
1. A driver circuit for powering a load, comprising: an input for receiving for connection to a source of AC power, and a rectifier for converting the AC power from the input into DC power; a voltage bus filter for smoothening the DC power from the rectifier, the voltage bus filter including at least one capacitor; a high-frequency oscillator for generating a high-frequency AC signal; a resonant driver in electrical communication with the high-frequency oscillator, the resonant driver limiting a current of the high-frequency AC signal and producing a limited output voltage based on the high-frequency AC signal; a feedback circuit in electrical communication with the resonant driver and the voltage bus filter, the feedback circuit maintaining a charge on the at least one capacitor of the voltage bus filter; a high-frequency DC rectifier in electrical communication with the resonant driver that rectifies the limited output voltage into a DC output voltage including a substantially constant current for powering the load; and a blocking capacitor in electrical communication with the rectifier, the voltage bus filter, and the high-frequency DC rectifier, the blocking capacitor located between the rectifier and the high-frequency DC rectifier, wherein the blocking capacitor allows for the high-frequency AC signal generated by the high-frequency oscillator to flow to the high-frequency DC rectifier and blocks the DC output voltage generated by the high-frequency DC rectifier from flowing back to the rectifier.