Abstract: In accordance with an embodiment, a power supply controller includes an error signal input configured to be coupled to a sensing node of a power supply, a control output configured to be coupled to a switch control circuit, and a control circuit having an input coupled to the error signal input. The control circuit is configured to provide a first variable limit signal if the error signal input is in a first range, and to adjust the first variable limit signal according to the error signal input.

Abstract: The present invention relates to BET-protein-inhibitory, in particular BRD4-inhibitory 5-aryltriazoloazepines of the general formula (I) in which R1, R2, R3 and R4 have the meanings given for the general formula (I), to pharmaceutical compositions comprising the compounds according to the invention, and to the prophylactic and therapeutic use thereof for hyperproliferative disorders, especially for neoplastic disorders. The present invention further relates to the use of BET protein inhibitors in viral infections, in neurodegenerative disorders, in inflammatory diseases, in atherosclerotic disorders and in male fertility control.

Abstract: The time when a switch is turned on from the time of one voltage valley to the time of another voltage valley may be adjusted for controlling an average load current or average load voltage. In some examples, the adjustment is instantaneous, and in some examples, the adjustment is gradual. Both of these example techniques provide for high switching efficiency of the switch.

Abstract: In accordance with an embodiment, a method includes driving an electronic switch in a switched-mode power converter in successive drive cycles, wherein driving the switch in each of the drive cycles comprises switching on the electronic for an on-period and subsequently switching off the electronic switch for an off-period. The method further includes establishing the on-period based on a comparison of an on-time signal with an off-threshold, calculating the off-threshold based on an output signal of the switched-mode power converter and a compensation offset, and calculating the compensation offset in one drive cycle based on an estimated delay time, wherein the estimated delay time is calculated based on a measured delay time and an estimated delay time of a previous drive cycle.

Abstract: A method for operating a power factor correction circuit is provided which may include the steps of providing a plurality of N switched-mode converter circuits each comprising an nth inductor, where N is at least 2, starting a switching pulse for the nth switched-mode converter circuit when the following conditions are fulfilled: the nth inductor of the nth switched-mode converter circuit has a predefined magnetization state; and a predefined time period has elapsed since the start of a switching pulse for an mth switched-mode converter circuit, where m=n?1 in case n>1 and m=N in case n=1. The predefined time period is a predefined fraction of the time period from the start of a previous switching pulse for the nth switched-mode converter circuit to a time when the nth inductor of the nth switched-mode converter circuit has the predefined magnetization state.

Abstract: An example relates to a method for operating a converter comprising (i) determining whether a valley for switching the converter in a quasi-resonant mode is available within a predetermined time range; (ii) selecting the valley if it is available within the predetermined time range; and (iii) changing the mode for operating the converter if the valley is not available within the predetermined time range.

Abstract: In accordance with an embodiment, a method includes driving an electronic switch in a switched-mode power converter in successive drive cycles, wherein driving the switch in each of the drive cycles comprises switching on the electronic for an on-period and subsequently switching off the electronic switch for an off-period, and measuring an operation parameter of the switched-mode power converter during the on-periods of the drive cycles, and storing the operation parameter measured in an on-period if a duration of the on-period met a predefined criteria. The method further includes forcing the on-period of a drive cycle to meet the predefined criteria if the operation parameter has not been stored for a predefined number of drive cycles, or for a pre-defined time duration.

Abstract: In one example, a method includes outputting, during a first phase, a first current level at a connector, and outputting, during a second phase, a second current level at the connector, wherein the second current level is complementary to the first current level. In this example, the method also includes determining whether or not a voltage level of the connector satisfies a threshold, and responsive to determining that the voltage level of the connector satisfies the threshold, determining that the connector is floating.

Abstract: A power factor correction (PFC) circuit includes a first inductor, which is operably supplied with an input voltage and an input current. The input voltage is a rectified AC line voltage. A semiconductor switch has a load current path coupled in series with the first inductor. An output terminal is coupled to the inductor and operably providing an output voltage and an output current. A controller circuit controls the cyclic switching operation of the semiconductor switch. The controller circuit is configured to monitor a feedback signal representing the voltage drop across the load current path of the semiconductor switch, to detect at least one local minimum in the feedback signal while the semiconductor switch is off, and to switch on the semiconductor switch in response to detecting the N-th local minimum in the feedback signal.

Abstract: What is described are BET protein-inhibitory, especially BRD2-, BRD3- and BRD4-inhibitory, bicyclo- and spino-substituted pyrrolo- and pyrazolodiazepines of the general formula I in which X, Y, n, m, R1, R2, R3, R4 and R5 are each as defined in the description, to intermediates for preparation of the inventive compounds, to pharmaceutical compositions comprising the inventive compounds, and to the prophylactic and therapeutic use thereof for hyperproliferative disorders, especially for tumour disorders. Also described is the use of the compounds according to the invention as BET protein inhibitors for benign hyperplasias, for atherosclerotic disorders, for sepsis, for autoimmune disorders, for vascular disorders, for viral infections, for neurodegenerative disorders, for inflammatory disorders, for atherosclerotic disorders and for male fertility control.

Abstract: BET protein-inhibitory, especially BRD2-, BRD3- and BRD4-inhibitory, 4-substituted pyrrolo- and pyrazolodiazepines of the general formula I are described, in which X, Y, n, m, p, R1, R2, R3, R4 and R5 are each as defined in the description, as are pharmaceutical compositions comprising the inventive compounds, and the prophylactic and therapeutic use thereof in the case of hyperproliferative disorders, especially in the case of neoplastic disorders. Also described is the use of the inventive compounds as BET protein inhibitors in benign hyperplasias, in atherosclerotic disorders, in sepsis, in autoimmune disorders, in vascular disorders, in viral infections, in neurodegenerative disorders, in inflammatory disorders and in male fertility control.

Abstract: In one example, a method includes outputting, during a first phase, a first current level at a connector, and outputting, during a second phase, a second current level at the connector, wherein the second current level is complementary to the first current level. In this example, the method also includes determining whether or not a voltage level of the connector satisfies a threshold, and responsive to determining that the voltage level of the connector satisfies the threshold, determining that the connector is floating.

Abstract: The present invention relates to BET-protein-inhibitory, in particular BRD4-inhibitory 5-aryltriazoloazepines of the general formula (I) in which R1, R2, R3 and R4 have the meanings given for the general formula (I), to pharmaceutical compositions comprising the compounds according to the invention, and to the prophylactic and therapeutic use thereof for hyperproliferative disorders, especially for neoplastic disorders. The present invention further relates to the use of BET protein inhibitors in viral infections, in neurodegenerative disorders, in inflammatory diseases, in atherosclerotic disorders and in male fertility control.

Abstract: In accordance with an embodiment, a method of controlling a switched-mode power supply includes demagnetizing a secondary winding of a transformer, monitoring an ending condition of the demagnetizing, tracking an elapsed time until the ending condition is detected based on the monitoring, and shutting down the switched-mode power supply when the elapsed time exceeds a predetermined threshold.

Abstract: In accordance with an embodiment, a method includes driving an electronic switch in a switched-mode power converter in successive drive cycles, wherein driving the switch in each of the drive cycles comprises switching on the electronic for an on-period and subsequently switching off the electronic switch for an off-period. The method further includes establishing the on-period based on a comparison of an on-time signal with an off-threshold, calculating the off-threshold based on an output signal of the switched-mode power converter and a compensation offset, and calculating the compensation offset in one drive cycle based on an estimated delay time, wherein the estimated delay time is calculated based on a measured delay time and an estimated delay time of a previous drive cycle.

Abstract: In accordance with an embodiment, a method of operating a switched-mode power converter includes driving a switching element in successive drive cycles, in which the switching element is driven to switch on for an on-period and subsequently driven to switch off for an off-period; sampling a feedback signal two or more times during the drive cycles, where the feedback signal includes a signal representative of an operation parameter of the switched-mode power converter and noise. The method further includes filtering the sampled feedback signal to extract the signal representative of the operation parameter from the sampled feedback signal and controlling the switching element according to the filtered feedback signal.

Abstract: Techniques are described to adjust the time when a switch is turned on from the time of one voltage valley to the time of another voltage valley for controlling an average load current or average load voltage. In some examples, the adjustment is instantaneous, and in some examples, the adjustment is gradual. Both of these example techniques provide for high switching efficiency of the switch.

Abstract: Techniques are described to adjust the time when a switch is turned on from the time of one voltage valley to the time of another voltage valley for controlling an average load current or average load voltage. In some examples, the adjustment is instantaneous, and in some examples, the adjustment is gradual. Both of these example techniques provide for high switching efficiency of the switch.

Abstract: In accordance with an embodiment, a method of operating a switched-mode power converter includes defining at least one of a minimum switching frequency threshold and a maximum switching frequency threshold; detecting valleys occurring in a voltage over the switching element when the switching element is in an off-state; and either in a quasi-resonant mode, switching the switching element on when an nth consecutive valley occurs, n being an integer equal to or greater than one, so that the actual switching frequency is at least one of: below the maximum switching frequency threshold and above the minimum switching frequency threshold, or in a forced switching frequency mode, switching the switching element on so that the actual switching frequency is the maximum or the minimum switching frequency.

Abstract: In accordance with an embodiment, a method includes driving an electronic switch in a switched-mode power converter in successive drive cycles, wherein driving the switch in each of the drive cycles comprises switching on the electronic for an on-period and subsequently switching off the electronic switch for an off-period, and measuring an operation parameter of the switched-mode power converter during the on-periods of the drive cycles, and storing the operation parameter measured in an on-period if a duration of the on-period met a predefined criteria. The method further includes forcing the on-period of a drive cycle to meet the predefined criteria if the operation parameter has not been stored for a predefined number of drive cycles, or for a pre-defined time duration.