Converter and Method of Operating a Converter for Supplying Current to a Light Emitting Means

摘要

A converter for supplying current to a light emitting means (8, 9), the converter (6, 7; 10; 90; 100) comprising: an input (11, 12) configured to receive a direct current supply voltage; 10 at least a first controllable switch (21; 41, 43) electrically connected between the input (11, 12) and an inductor (13), and a second controllable switch (22; 42, 44) electrically connected between the input (11, 12) and the inductor (13);a first diode (14) and a second diode (15) connected in series; a first capacitance (16) connected in parallel with the first diode (14) and a second capacitance (17) connected in parallel with the second diode (15); the inductor (13) having a terminal coupled to the at least one controllable switch (21, 22; 41-44) and another terminal coupled to an anode of the first diode (14) and a cathode of the second diode (15); and a control device (20) to control the first controllable switch (21; 41, 43) and the second controllable switch (22; 42, 44), wherein the control device (20) is configured to adjust a switching frequency of the first controllable switch (21; 41, 43) and of the second controllable switch (22; 42, 44) to set an output current of the converter (6, 7; 10; 90; 100).

主权项

1. A converter for supplying current to a light emitting means (8, 9), the converter (6, 7; 0; 90; 100) comprising:
an input (11, 12) configured to receive a direct current supply voltage; at least a first controllable switch (21; 41, 43) electrically connected between the input (11, 12) and an inductor (13), and a second controllable switch (22; 42, 44) electrically connected between the input (1), 12) and the inductor (13);a first diode (14) and a second diode (15) connected in series; a first capacitance (16) connected in parallel with the first diode (14) and a second capacitance (17) connected in parallel with the second diode (15); the inductor (13) having a terminal coupled to the at least one controllable switch (21, 22; 41-44) and another terminal coupled to an anode of the first diode (14) and a cathode of the second diode (15); and a control device (20) to control the first controllable switch (21; 41, 43) and the second controllable switch (22; 42, 44), wherein the control device (20) is configured to adjust a switching frequency of the first controllable switch (21; 41, 43) and of the second controllable switch (22; 42, 44) to set an output current of the converter (6, 7; 10; 90; 100).