Systems and methods of delivering rectified voltage to a load

Patent · Tue Jan 22 04:00:00 EST 2019

OSTI ID:1498493

Palmer, Fred

A solid state light source driver circuit that operates in either a buck convertor or a boost convertor configuration is provided. The driver circuit includes a controller, a boost switch circuit and a buck switch circuit, each coupled to the controller, and a feedback circuit, coupled to the light source. The feedback circuit provides feedback to the controller, representing a DC output of the driver circuit. The controller controls the boost switch circuit and the buck switch circuit in response to the feedback signal, to regulate current to the light source. The controller places the driver circuit in its boost converter configuration when the DC output is less than a rectified AC voltage coupled to the driver circuit at an input node. The controller places the driver circuit in its buck converter configuration when the DC output is greater than the rectified AC voltage at the input node.

• Research Organization: Osram Sylvania Inc., Wilmington, MA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: EE0000611
• Assignee: Osram Sylvania Inc. (Wilmington, MA)
• Patent Number(s): 10,186,981
• Application Number: 15/092,688
• OSTI ID: 1498493
• Country of Publication: United States
• Language: English