System and method via which a switching element is switched in a regulated state of a switching converter at a predetermined stable switching frequency, wherein a switch-on point of the switching element is predetermined by a switching signal generated via a sawtooth signal reaching/exceeding a switch-on threshold value such that the switch-on point of the switching element falls in a valley of an oscillating voltage prevailing at the switched-off switching element, where a prevailing period duration of the switching signal is continuously determined to detect the period duration that is compared with a predetermined reference period duration of a period duration reference unit, a control variable is generated from the comparison and a gap is changed between the sawtooth signal, which is influenced with the valley-identifying signal, and the switch-on threshold value until ascertaining, with reference to the determined prevailing period duration, the stable switching frequency has been reached.

An apparatus includes a first power converter and a second power converter. The first power converter converts an input voltage into a first output voltage; the second power converter converts the first output voltage into a second output voltage that powers a load. The second power converter includes a switched-capacitor converter combined with a magnetic device. The switched-capacitor converter provides capacitive energy transfer; the magnetic device provides magnetic energy transfer. Additionally, the second power converter provides unregulated conversion of the first output voltage into the second output voltage via the capacitive energy transfer and the magnetic energy transfer. To maintain the magnitude of the second output voltage within a desired range or setpoint value, the first power converter regulates a magnitude of the first output voltage based on comparison of a magnitude of the second output voltage with respect to a desired setpoint reference voltage.

Disclosed are a Power Factor Correction (PFC) control method, apparatus, and device, and a computer-readable storage medium. The method includes: acquiring an input voltage value, input current value, and output voltage value from a PFC circuit (S101); acquiring a current reference value for current loop control by using a Prony’s method according to the input voltage value, the output voltage value, and a preset voltage reference value (S102); and performing current loop control according to the current reference value and the input current value, and outputting a corresponding Pulse Width Modulation (PWM) signal, so as to control a switch tube in the PFC circuit to be correspondingly switched on or switched off (S103).

The invention relates to a method of controlling the on-time of a plurality of energy modules of an energy storage. The energy storage comprising a plurality of series connected energy modules forming an energy module string. A string controller is controlling which of the individual energy modules that is part of a current path through the energy module string, by control of the status of a plurality of switches. The string controller is controlling the frequency of the energy module string voltage according to an electric system reference related to a system to which the energy storage is connected. And wherein the string controller is controlling the switches of the individual energy modules so that each of the individual energy modules that are required to be included in the current path to establish the energy modules string voltage are included in the current path for at least a minimum on-time.

An integrated circuit for a power supply circuit configured to generate an output voltage at a target level. The power supply circuit includes a transistor configured to control an inductor current flowing through an inductor. The integrated circuit includes a load detection circuit outputting a detection voltage corresponding to a power consumption of a load and corresponding to an operation mode of the power supply circuit, based on the inductor current, a driver circuit driving the transistor according to the operation mode of the power supply circuit, and a control circuit configured to control the driver circuit to switch the power supply circuit to a second mode upon the detection voltage reaching a first level with a decrease in the power consumption of the load, and to a first mode upon the detection voltage reaching a second level with an increase in the power consumption of the load.

An apparatus includes a buck converter portion of a buck-boost converter configured to operate under a constant on-time control scheme, wherein an on-time of a high-side switch of the buck converter portion is determined by a buck on-time timer, and a boost converter portion of the buck-boost converter configured to operate under a constant off-time control scheme, wherein an off-time of a low-side switch of the boost converter portion is determined by a boost off-time timer.

A voltage converter includes a capacitive voltage conversion circuit, an output capacitor, an inductor, a current detector, and a controller. The capacitive voltage conversion circuit includes switches, at least one flying capacitor, and an intermediate capacitor at an output portion. The current detector detects a current flowing in the inductor. The controller controls the switches in the capacitive voltage conversion circuit to change between at least two states by comparing the current flowing in the inductor to a threshold current.

An architecture for a multi-port AC/DC Switching Mode Power Supply (SMPS) with Power Factor Correction (PFC) comprises power management control (PMC) for PFC On/Off Control and Smart Power Distribution, and optionally, a boost follower circuit. For example, in a universal AC/DC multi-port USB-C Power Delivery (PD) adapter, PMC enables turn-on and turn-off of PFC dependent on output port operational status and a combined load of active output ports. A microprocessor control unit (MCU) receives operational status, a voltage sense input and a current sense input for each USB port, computes output power for each USB port, and executes a power distribution protocol to turn-on or turn-off PFC dependent on the combined load from each USB port. Available power may be distributed intelligently to one or more ports, dependent on load. In an example embodiment, turning-off PFC for low load and low AC line input increases efficiency by 3% to 5%.

A controller of a power converter is coupled to a switch assembly and configured to perform a hold-up time procedure that causes the controller to control first and second switching elements into opposite conducting states during a first period of time of a pulse cycle and into alternate opposite conducting states during a second period of time of the pulse cycle. The hold-up time procedure also causes the controller to control a first pair of synchronous rectifier switching devices into a conducting state during a third period of time overlapping less than all of the first period of time and into the conducting state during a fourth period of time overlapping less than all of the second period of time. A second pair of synchronous rectifier switching devices is controlled into a non-conducting state during the first and second periods of time.

A reference voltage generator configured to be supplied with a first voltage from an external device and to generate a reference voltage which is a voltage lower than a second voltage which is a voltage higher than the first voltage supplied from the external device on the basis of the second voltage through negotiation with the external device; a determiner configured to determine a magnitude relationship between the second voltage and the reference voltage; and an output configured to notify that a voltage has decreased when the second voltage is equal to or lower than the reference voltage on the basis of the result of determination are included.