Abstract: The invention relates to a synchronous flyback converter (100) having terminals for supplying an LED load. The synchronous flyback converter (100) comprises a sensing winding (Lw) coupled to a primary winding (Lp) of a transformer T of the flyback converter (100), a control unit (106) controlling a primary side switch (S1) in series to the primary winding (Lp) of the flyback converter (100) using a feedback signal for a closed loop control of a secondary side voltage of the flyback converter (100) by controlling the frequency and/or duty cycle of the switching of the primary side switch (S1), wherein the feedback signal is derived from a sensing voltage across the sensing winding (Lw) sampled once during a switch-on time of a secondary side switch (S2) of the flyback converter (100).

Abstract: A switched power converter (102) is arranged for supplying lighting means (108) as a load, having at least one (M40, M41) switch controlled by a control unit (106), wherein the control unit (106) comprises: a feedback controller, such as an ASIC or microcontroller, generating a switch control signal based on a feedback signal (Imeas), such as e.g. the load current (ILED), and a separate sweep block, supplied with a signal representing a characteristic of the load (LED), such as e.g. the load voltage (VLED), and modulating the switch control signal (tout-ctrl) by a cyclic sweep, wherein the modulated switch control signal (tout-sweep) is provided directly or indirectly to the at least one switch (M40, M41).

Abstract: The invention relates to a synchronous flyback converter (100) having terminals for supplying an LED load. The synchronous flyback converter (100) comprises a sensing winding (Lw)coupled to a primary winding (Lp) of a transformer T of the flyback converter (100), a control unit (106) controlling a primary side switch (S1) in series to the primary winding (Lp) of the flyback converter (100) using a feedback signal for a closed loop control of a secondary side voltage of the flyback converter (100) by controlling the frequency and/or duty cycle of the switching of the primary side switch (S1), wherein the feedback signal is derived from a sensing voltage across the sensing winding (Lw) sampled once during a switch-on time of a secondary side switch (S2) of the flyback converter (100).

Abstract: A switched power converter (102) is arranged for supplying lighting means (108) as a load, having at least one (M40, M41) switch controlled by a control unit (106), wherein the control unit (106) comprises: a feedback controller, such as an ASIC or microcontroller, generating a switch control signal based on a feedback signal (Imeas), such as e.g. the load current (ILED), and a separate sweep block, supplied with a signal representing a characteristic of the load (LED), such as e.g. the load voltage (VLED), and modulating the switch control signal (tout-ctrl) by a cyclic sweep, wherein the modulated switch control signal (tout-sweep) is provided directly or indirectly to the at least one switch (M40, M41).

Abstract: The invention relates to a synchronous converter (10) comprising a transformer (11A, 11B) having a predefined winding ratio, which couples a supply-side (12) and a load side (13) of the synchronous converter (10), which are each allocated limit current intensities (15?, 15?, 24?, 24?); detection means (14), which are configured to detect a current intensity (15) on one side (12) from the supply side (12) and the load side (13); conversion means (16), which are configured to provide the limit current intensities (24?, 24?) from the other side (13) from the supply-side (12) and the load side (13), converted via the predefined winding ratio, as corresponding limit current intensities (15*, 15**) on the one side (12); and comparison means (17), which are configured to compare the detected current intensity (15) with the limit current intensities (15?, 15?) of the one side (12) and with the corresponding limit current intensities (15*, 15**) on the one side (12).

Abstract: The present invention relates to a synchronous flyback converter circuit (1) for operating an illuminant line (4) having at least one illuminant (5), more particularly having at least one light emitting diode, the synchronous flyback converter circuit (1) comprising: a transformer (T), having a primary winding (Np), which is electrically connected to a first switch (S1), and a secondary winding (Ns), which is electrically connected to an output (A1, A1?) of the synchronous flyback converter circuit via a second switch (S2), the illuminant line (4) being able to be connected to the output; and a control unit (2), which is designed to control the first switch (S1) and the second switch (S2).

Abstract: The invention relates to a synchronous converter (10) comprising a transformer (11A, 11B) having a predefined winding ratio, which couples a supply-side (12) and a load side (13) of the synchronous converter (10), which are each allocated limit current intensities (15?, 15?, 24?, 24?); detection means (14), which are configured to detect a current intensity (15) on one side (12) from the supply side (12) and the load side (13); conversion means (16), which are configured to provide the limit current intensities (24?, 24?) from the other side (13) from the supply-side (12) and the load side (13), converted via the predefined winding ratio, as corresponding limit current intensities (15*, 15**) on the one side (12); and comparison means (17), which are configured to compare the detected current intensity (15) with the limit current intensities (15?, 15?) of the one side (12) and with the corresponding limit current intensities (15*, 15**) on the one side (12).

Abstract: The aim of the invention, as demonstrated in various examples, is to control a current flow to an electrical load, e.g. a light emitting diode, in a particularly precise manner. For this purpose, control gear (90) comprising a DC-DC switching controller (100) is used in various examples.

Abstract: The present invention relates to a synchronous flyback converter circuit (1) for operating an illuminant line (4) having at least one illuminant (5), more particularly having at least one light emitting diode, the synchronous flyback converter circuit (1) comprising: a transformer (T), having a primary winding (Np), which is electrically connected to a first switch (S1), and a secondary winding (Ns), which is electrically connected to an output (A1, A1?) of the synchronous flyback converter circuit via a second switch (S2), the illuminant line (4) being able to be connected to the output; and a control unit (2), which is designed to control the first switch (S1) and the second switch (S2).

Abstract: The aim of the invention, as demonstrated in various examples, is to control a current flow to an electrical load, e.g. a light emitting diode, in a particularly precise manner. For this purpose, control gear (90) comprising a DC-DC switching controller (100) is used in various examples.

Abstract: A flyback converter (10) for operating one or more lighting means, wherein the flyback converter (10) has a transformer and the transformer is arranged between a primary side of the flyback converter (10) and a secondary side of the flyback converter (10), wherein the flyback converter (10) is configured, and wherein the flyback converter (10) has a current detection circuit (107) that is configured to detect the current flowing through the secondary side of the flyback converter (10). The current detection circuit (107) can have a current detection transformer (108, 109). The flyback converter (10) can be configured such that the current flowing through the secondary side of the flyback converter (10) flows in a negative direction at least some of the time.

Abstract: A flyback converter (10) for operating one or more lighting means, wherein the flyback converter (10) has a transformer and the transformer is arranged between a primary side of the flyback converter (10) and a secondary side of the flyback converter (10), wherein the flyback converter (10) is configured, and wherein the flyback converter (10) has a current detection circuit (107) that is configured to detect the current flowing through the secondary side of the flyback converter (10). The current detection circuit (107) can have a current detection transformer (108, 109). The flyback converter (10) can be configured such that the current flowing through the secondary side of the flyback converter (10) flows in a negative direction at least some of the time.