LED driver circuits

摘要

In some implementations, a circuit includes a first terminal to couple with an alternating current (AC) power source and a second terminal to couple with the AC power source. The circuit includes a first diode and a second diode that are coupled in series, the first terminal being coupled to a node between the first diode and the second diode. The circuit includes a first capacitor and a second capacitor that are coupled in series, the second terminal being coupled to a node between the first capacitor and the second capacitor. The circuit includes one or more light emitting diode elements coupled in parallel with the first capacitor and the second capacitor.

主权项

1. A device comprising:
a first terminal to couple with an alternating current (AC) power source; a second terminal to couple with the AC power source; a first diode and a second diode that are coupled in series, the first terminal being coupled to a node between the first diode and the second diode; a first capacitor and a second capacitor that are coupled in series, the second terminal being coupled to a node between the first capacitor and the second capacitor; a third capacitor that is coupled in series between (i) the first terminal and the node between the first diode and the second diode, or (ii) the second terminal and the node between the first capacitor and the second capacitor; and one or more light emitting diode elements coupled in parallel with the first capacitor and the second capacitor; wherein the device is configured to operate using an AC power source having a particular AC voltage, wherein the one or more light emitting diode elements are configured to operate at full rated output at a first DC voltage across the one or more light emitting diode elements, and wherein the first DC voltage is greater than a maximum DC output voltage provided by the rectifier across the one or more light emitting diode elements when the device is coupled to the AC power source of the particular AC voltage.