A power supply comprises a power converter having a transformer, a low side switch configured to draw current from a supply voltage through a primary winding of the transformer and a high side switch configured to couple the primary winding of the transformer to a snubber capacitor. A controller is configured to control the power converter by generating drive signals that control the opening and closing of the high side switch and the low side switch. The controller is configured to selectively control the high side switch according to various modes of operation depending on operating conditions such as input voltage and load power consumption. The modes of operation can include, for example, a mode in which the high side switch is closed and then opened once during each of the series of switching cycles and a mode of operation in which the high side switch is closed and then opened two times during each of the series of switching cycles.

Power management circuitry may be provided to control a power state of a voltage regulator for providing a regulated voltage to a load, the voltage regulator being operable in at least first and second different power states. The power management circuitry may comprise circuitry to determine output current data relating to an output current to be provided by the voltage regulator to the load. The power management circuitry may comprise circuitry to determine regulated voltage data relating to a regulated voltage to be provided by the voltage regulator to the load. The power management circuitry may comprise circuitry to cause a change in the power state of the voltage regulator from the first power state to the second power state based on a comparison of the determined output current data and power state current threshold data.

A burst-mode controller for a DC-DC converter includes an output module configured to provide a switch control signal to the DC-DC converter. The switch control signal includes a plurality of burst windows, each burst window corresponding to a period of a fixed-frequency burst clock and having a number of switching cycles. The burst-mode controller includes an on-time-control-module configured to receive a compensation signal based on the output voltage of the DC-DC converter, and set an on-time of the switching cycles of the switch control signal based on the compensation signal. The burst-mode controller also includes a burst-control-module configured to regulate the on-time of the switching cycles of the switch control signal by setting the number of switching cycles for each burst window of the switch control signal.

A method for controlling a distributed power conversion system comprises: configuring N control units for controlling N power modules of the system respectively, wherein each of the control units is configured to execute: step S1, generating a first variable Q1 reflecting respective module serial numbers R according to a coordination variable; step S2, generating a second variable Q2 reflecting the optimal operating number M of the modules; and step S3, comparing the first variable Q1 and the second variable Q2, wherein, when the first variable Q1 is greater than the second variable Q2, the corresponding power module stops; and when the first variable Q1 is less than or equal to the second variable Q2, the corresponding power module runs.

A system may include a power converter configured to receive an input voltage and generate an output voltage and a controller configured to control operation of the power converter based on a comparison of a current associated with the power converter to a threshold current and control the threshold current as a function of the input voltage.

The present disclosure provides a control method for a DC converter and a DC converter. the DC converter comprises a switching circuit, a sampling circuit, and a controller, the method comprising: acquiring a duty ratio of a Burst cycle according to an output reference signal and an output signal; acquiring a first number of switching cycles and a burst on time according to the duty ratio of the Burst cycle, a first preset value, and a switching period of the switching device; acquiring a Burst cycle value according to the burst on time and the duty ratio of the Burst cycle; and generating a driving signal according to the Burst cycle value, the first number of switching cycles, and the switching period.

Switching power supply apparatus having standby mode in which a burst operation is performed. High- and low-side switching elements are series connected across a DC input voltage. A resonant circuit is connected across one of the switching elements. A controller that on-off controls the high-side switching element includes a peak power limiting circuit that monitors input power and outputs a forced turn-off signal upon detecting input power exceeding a determined value. A triangular wave voltage is generated during portions of the burst operation in which a switching frequency of the switching elements is gradually decreased or increased. An oscillation circuit receives the forced turn-off signal from the power limiting circuit, and the triangular wave voltage to generate an on-trigger and off-trigger signals at a switching frequency corresponding to a triangular wave voltage value, and output the off-trigger signal upon receipt of the forced turn-off signal.

A power converter and a method of operation thereof is disclosed including an input, an output, a sensor unit, a switched power converter, and a processor module. The power converter may convert an input power into an output power. The power converter may sense real-time measurements of the input power and the output power to determine a real-time calculated efficiency. The power converter may chop the input power into sized and positioned portions of the input power based on a plurality of determined operating parameters. The power converter may determine the operating parameters based on the real-time calculated efficiency and on a plurality of other operating factors/conditions.

An external power supply and a system connection detection unit applied thereto are provided. For providing DC power, the external power supply separably connects with a positive input terminal and a negative input terminal of a system through a positive output terminal and a negative output terminal respectively. When the positive output terminal and the negative output terminal are respectively connected to the positive input terminal and the negative input terminal, a system detection terminal connects with a system connection terminal of the system, and a connection status signal generated by the system connection detection unit switches the operation of the external power supply from a deep sleeping mode to a normal operation mode. The system connection terminal is electrically connected to one of the positive input terminal and the negative input terminal through at least a first resistive element.

A semiconductor device, for controlling a power supply which generates and outputs a driving pulse, includes: a clock generating circuit with an oscillating circuit in which a frequency can be changed and which generates a clock signal; a voltage/electric current control circuit which provides timing to turn off a switching element; a setting terminal to provide setting information from outside; a switch between a first power supply terminal and a second power supply terminal; and an internal power supply voltage control circuit which controls the switch. When voltage of the setting terminal is lower than a first voltage value, the device advances to a first stop mode in which output of a driving pulse is stopped. When voltage of the setting terminal is higher than the first voltage value, the device advances to a second stop mode in which the output of the driving pulse is stopped.