Abstract: A resonant converter circuit comprising a controller having a Vbusdiv-input-terminal configured to receive a Vbusdiv-input-signal; and a Vbus-compensation-network. The Vbus-compensation-network comprising: a Vbus-input-terminal configured to receive a bus-voltage-signal; and a Vbusdiv-output-terminal configured to provide the Vbusdiv-input-signal to the controller; a reference terminal; an AC-impedance-network connected between the Vbus-input-terminal and the Vbusdiv-output-terminal, wherein the AC-impedance-network is configured to apply an AC transfer function to the received bus voltage signal; a DC-impedance-network connected between the Vbus-input-terminal and the Vbusdiv-output-terminal, wherein the DC-impedance-network is configured to apply a DC transfer function to the received bus voltage signal. The DC transfer function is different to the AC transfer function. The controller is configured to control operation of a resonant converter in accordance with the Vbusdiv-input-signal.

Abstract: A control arrangement is disclosed for a switch mode power supply (SMPS), the SMPS comprising an opto-coupler configured to transfer, from a secondary side to a primary side of the switch mode power supply by means of an LED current, a control signal indicative of an error between an amplifier-reference-signal and an amplifier-sensed-signal indicative of an actual value of an output parameter, the control arrangement comprising: an error amplifier configured to integrate the error to determine the LED current; and a feedback loop configured to adjust the magnitude of the LED current by modifying the amplifier-reference-signal or the amplifier-sensed-signal in order to reduce the error. A SMPS comprising such a control arrangement, and a corresponding method is also disclosed.

Abstract: A power converter including: a dual output resonant converter including a first output, a second output, a common mode control input, and a differential mode control input, wherein a voltage/current at the first output and a voltage/current at the second output are controlled in response to a common mode control signal received at the common mode control input and a differential mode control signal received at the differential mode control input; a dual output controller including a first error signal input, a second error signal input, a common mode control output, and a differential mode control output, wherein the dual output controller is configured to generate the common mode control signal and the differential mode control signal in response to a first error signal received at the first error signal input and a second error signal received at the second error signal input, wherein the first error signal is a function of the voltage/current at the first output and the second error signal is a function of

Abstract: A power converter including: a dual output resonant converter including a first output, a second output, a common mode control input, and a differential mode control input, wherein a voltage/current at the first output and a voltage/current at the second output are controlled in response to a common mode control signal received at the common mode control input and a differential mode control signal received at the differential mode control input; and a dual output controller including a first error signal input, a second error signal input, a delta power signal input, a common mode control output, and a differential mode control output, wherein the dual output controller is configured to generate the common mode control signal and the differential mode control signal in response to a first error signal received at the first error signal input and a second error signal received at the second error signal input, wherein the first error signal is a function of the voltage/current at the first output and the seco

Abstract: A power converter including: a dual output resonant converter including a first output, a second output, a common mode control input, and a differential mode control input, wherein a voltage/current at the first output and a voltage/current at the second output are controlled in response to a common mode control signal received at the common mode control input and a differential mode control signal received at the differential mode control input; and a dual output controller including a first error signal input, a second error signal input, a common mode control output, and a differential mode control output, wherein the dual output controller is configured to generate the common mode control signal and the differential mode control signal in response to a first error signal received at the first error signal input and a second error signal received at the second error signal input, wherein the first error signal is a function of the voltage/current at the first output and the second error signal is a functio

Abstract: A control arrangement is disclosed for a switch mode power supply (SMPS) operable in a burst mode and comprising an opto-coupler configured to transfer, from a secondary side to a primary side of the switch mode power supply by means of an LED current, a control signal indicative of a time-varying error between a reference signal and a signal indicative of an actual value of an output parameter, the control arrangement comprising: an error amplifier configured to operate as a proportional-integrating error amplifier to determine the LED current from the time-varying; and a feedback loop configured to adjust the magnitude of the LED current between bursts by modifying the time-dependant error. A SMPS comprising such a control arrangement, and a corresponding method is also disclosed.

Abstract: A communication circuit for communication over a voltage isolation barrier, the communication circuit including a pulse driven transformer coupled to a current sensing input, wherein information is transferred in the current domain and wherein during the information transfer, the receiver input is made low ohmic, a current pulse transformer including a primary winding, a core, and a secondary winding, a resistor in parallel with the secondary winding, a current sensor having a low ohmic input to receive a pulse from the secondary winding, and a signal processing unit to extract information from the received pulse.

Abstract: A power converter including: a dual output resonant converter including a first output, a second output, a common mode control input, and a differential mode control input, wherein a voltage/current at the first output and a voltage/current at the second output are controlled in response to a common mode control signal received at the common mode control input and a differential mode control signal received at the differential mode control input; and a dual output controller including a first error signal input, a second error signal input, a delta power signal input, a common mode control output, and a differential mode control output, wherein the dual output controller is configured to generate the common mode control signal and the differential mode control signal in response to a first error signal received at the first error signal input and a second error signal received at the second error signal input, wherein the first error signal is a function of the voltage/current at the first output and the seco

Abstract: A method is disclosed of discharging an input capacitor of a switch mode power supply comprising a power switch and the input capacitor, through the power switch and in response to disconnection of the switch mode power supply from a mains supply, the power switch having a control terminal and main terminals; the method comprising a repeated sequence, the sequence comprising: charging the control terminal to partially close the power switch until a comparator indicates that a capacitor discharge current from the capacitor through the main terminals is equal to a reference signal; and thereafter discharging the control terminal, thereby stopping the capacitor discharge current. A corresponding control and power supply is also disclosed.

Abstract: A power converter and a method for controlling a power converter are disclosed. The method involves generating a common mode control signal and a differential mode control signal in response to a first error signal and a second error signal, wherein the first error signal is a function of the voltage/current at a first output of a dual output resonant converter and the second error signal is a function of the voltage/current at a second output of the dual output resonant converter. The method also involves adjusting the voltage/current at the first output of the dual output resonant converter and the voltage/current at the second output of the dual output resonant converter in response to the common mode control signal and the differential mode control signal.

Abstract: A power converter and a method for controlling a power converter are disclosed. The method involves generating a common mode control signal and a differential mode control signal in response to a first error signal and a second error signal, wherein the first error signal is a function of the voltage/current at a first output of a dual output resonant converter and the second error signal is a function of the voltage/current at a second output of the dual output resonant converter. The method also involves adjusting the voltage/current at the first output of the dual output resonant converter and the voltage/current at the second output of the dual output resonant converter in response to the common mode control signal and the differential mode control signal.

Abstract: A controller for a resonant converter, the resonant converter comprising a first switch and a second switch. The controller configured to: close the first switch to start a half cycle of operation; open the first switch before completion of the half cycle; maintain the first switch and the second switch in an open state in order to define a stop-interval; and end the stop-interval by closing the second switch.

Abstract: Techniques for operating a power converter system that includes an LLC resonant converter and a non-inverting buckboost converter that is located in front of the LLC resonant converter are disclosed. In an embodiment, the output voltage of a non-inverting buckboost converter is regulated in response to the input voltage and the output voltage of an LLC resonant converter in order to maintain a desired ratio between the input voltage and the output voltage of the LLC resonant converter. For example, the ratio between the input voltage and the output voltage of the LLC resonant converter is controlled to a desired ratio that matches the turns ratio of the LLC resonant converter's transformer and that may also match (as a second order effect) the ratio of Lr to Lm.

Abstract: Methods for supplying a synchronous rectifier (SR) driver circuit and supply voltage generation circuits for a SR driver circuit are described. In one embodiment, a method for supplying a SR driver circuit involves receiving a converted voltage from a secondary winding of a transformer and generating a supply voltage for the SR driver circuit based on the converted voltage, where the supply voltage is higher than an output voltage of the transformer that is generated using the secondary winding. Other embodiments are also described.

Abstract: Embodiments of a controller integrated circuit (IC) device for a switched mode power converter and a method of operating a controller IC device of a switched mode power converter are described. In one embodiment, a controller IC device for a switched mode power converter an input/output unit connected to an input/output node of the controller IC device and a controller unit. The input/output unit is configured to receive an input current from the input/output node and output an output voltage through the input/output node in response to an input voltage received at the input/output unit. The controller unit is configured to control voltage regulation of the switched mode power converter in response to the input current received from the input/output unit and generate the input voltage for the input/output unit. Other embodiments are also described.

Abstract: The disclosure relates to a control arrangement for a SMPS, the control arrangement comprising: an input terminal configured to receive a feedback-signal (V1) representative of an output of the SMPS; a normal-mode-processing-arrangement-configured to process the feedback-signal and provide a normal-mode-control-signal for operating the SMPS in a normal mode of operation; a burst-mode-processing-arrangement configured to process the feedback-signal and provide a burst-mode-control-signal for operating the SMPS in a burst mode of operation; and a feedback-control-processing-arrangement configured to operate the SMPS such that the feedback signal in the normal mode of operation has a predetermined relationship with the feedback signal in the burst mode of operation.

Abstract: A control arrangement is disclosed for a switch mode power supply (SMPS), the SMPS comprising an opto-coupler configured to transfer, from a secondary side to a primary side of the switch mode power supply by means of an LED current, a control signal indicative of an error between an amplifier-reference-signal and an amplifier-sensed-signal indicative of an actual value of an output parameter, the control arrangement comprising: an error amplifier configured to integrate the error to determine the LED current; and a feedback loop configured to adjust the magnitude of the LED current by modifying the amplifier-reference-signal or the amplifier-sensed-signal in order to reduce the error. A SMPS comprising such a control arrangement, and a corresponding method is also disclosed.

Abstract: A noise detection circuit 100 for a power supply, the noise detection circuit 100 comprising: an impedance element 110 connected to a line 104 for carrying a power supply current having a noise signal component, the noise signal comprising a common mode noise signal and a differential mode noise signal; a filter element 112 coupled to the impedance element 110 and configured to suppress the differential mode noise signal in the noise detection circuit 110; and an evaluation circuit 140 coupled to the impedance element 110 or the filter element 112 and arranged to sense the common mode noise signal and provide an output representative of the common mode noise signal.

Abstract: Disclosed is a power converter including a generator configured to generate a sequence of output voltage waveforms, a resonant tank connected to the generator comprising at least one capacitor and at least one inductor, a transformer including a primary side connected in series with said series inductor and, the primary side being configurable to use at least one primary winding tap and a secondary side for connecting to a rectifying circuit for providing a rectified DC voltage to an output load circuit, a first switch and a second switch on the primary side connected to the primary winding, wherein the at least one primary winding is selected by the first switch or the second switch to select a different reflected output voltage by closing the first switch or the second switch.

Abstract: Disclosed is a power converter including a generator configured to generate a sequence of output voltage waveforms, a resonant tank connected to the generator comprising at least one capacitor and at least one inductor, a transformer including a primary side connected in series with said series inductor and, the primary side being configurable to use at least one primary winding tap and a secondary side for connecting to a rectifying circuit for providing a rectified DC voltage to an output load circuit, a first switch and a second switch on the primary side connected to the primary winding, wherein the at least one primary winding is selected by the first switch or the second switch to select a different reflected output voltage by closing the first switch or the second switch.