A control device for a switching voltage regulator of the buck-boost type having a switching circuit. The control device is configured to perform a current-control of the switching circuit and is formed by a filter and a loop control circuit. The filter is configured to be coupled to a resistive element of the switching circuit and to provide a filtered signal starting from a measurement signal indicative of a current flowing through the resistive element. The loop control circuit is configured to generate one or more switching control signals to drive the switching circuit, as a function of the filtered signal. The filter is configured to receive a filter control signal indicative of an actual operating mode of the switching voltage regulator. The filter is variable as a function of the filter control signal.

A control device for a switching voltage regulator of the buck-boost type having a switching circuit. The control device is configured to perform a current-control of the switching circuit and is formed by a filter and a loop control circuit. The filter is configured to be coupled to a resistive element of the switching circuit and to provide a filtered signal starting from a measurement signal indicative of a current flowing through the resistive element. The loop control circuit is configured to generate one or more switching control signals to drive the switching circuit, as a function of the filtered signal. The filter is configured to receive a filter control signal indicative of an actual operating mode of the switching voltage regulator. The filter is variable as a function of the filter control signal.

The present application provides a solar charging system and a control method thereof. The solar charging system includes: a first battery pack, a photovoltaic power generation module, a second battery pack, a DC/DC converter and a control component. The first battery pack is electrically connected to the second battery pack through the DC/DC converter. The second battery pack is electrically connected to the photovoltaic power generation module. The control module is configured to detect the voltage of the second battery pack, and control connection/disconnection between the DC/DC converter and the second battery pack according to the detected voltage.

The present application provides a solar charging system and a control method thereof. The solar charging system includes: a first battery pack, a photovoltaic power generation module, a second battery pack, a DC/DC converter and a control component. The first battery pack is electrically connected to the second battery pack through the DC/DC converter. The second battery pack is electrically connected to the photovoltaic power generation module. The control module is configured to detect the voltage of the second battery pack, and control connection/disconnection between the DC/DC converter and the second battery pack according to the detected voltage.

Disclosed are a modulation method of a modular multilevel converter and a fault isolation method of a submodule unit. The modulation method comprises a first mode and a second mode, and the first mode and the second mode operate cyclically. In the first mode, a first power semiconductor switch and a second power semiconductor switch are turned on alternately, while a third power semiconductor switch is turned off normally and a fourth power semiconductor switch is turned on normally. In the second mode, the third power semiconductor switch and the fourth power semiconductor switch are turned on alternately, while the first power semiconductor switch is turned on normally and the second power semiconductor switch is turned off normally. The method enables junction temperatures of the power semiconductor switches used to be equalized, increases an operation safety margin of the converter, effectively increase the capacity of the converter without increasing engineering costs, and achieve better performance in both economic efficiency and technicality.

Disclosed are a modulation method of a modular multilevel converter and a fault isolation method of a submodule unit. The modulation method comprises a first mode and a second mode, and the first mode and the second mode operate cyclically. In the first mode, a first power semiconductor switch and a second power semiconductor switch are turned on alternately, while a third power semiconductor switch is turned off normally and a fourth power semiconductor switch is turned on normally. In the second mode, the third power semiconductor switch and the fourth power semiconductor switch are turned on alternately, while the first power semiconductor switch is turned on normally and the second power semiconductor switch is turned off normally. The method enables junction temperatures of the power semiconductor switches used to be equalized, increases an operation safety margin of the converter, effectively increase the capacity of the converter without increasing engineering costs, and achieve better performance in both economic efficiency and technicality.

A circuit comprises an Inductor-Inductor-Capacitor (LLC) tank circuit and an energizing circuit. The LLC tank circuit includes first and second inductors, a capacitor, and a primary coil of a transformer. The first inductor is coupled in series with the second inductor, the second inductor is coupled in series with the capacitor, and the primary coil is coupled in parallel with the second inductor. The energizing circuit supplies power to the LLC tank circuit according to a switching period, and detects a power limit condition according to a value of an integrated current sense signal and a duration of the switching period. The integrated current sense signal corresponds to an integration over time of a current supplied to the LLC tank circuit. The circuit may be incorporated into a power converter to provide power limit detection according to an accurate real-time estimation of the power converter's output power.

The present application discloses a direct current (DC) converter including a voltage divider for dividing a voltage provided by a DC voltage source, having a positive DC voltage input terminal, a negative DC voltage input terminal, and a divided voltage output terminal; a conversion circuit having a first switch, a second switch, an inductor unit, a first unidirectional conductor, and a second unidirectional conductor; a positive converted voltage output terminal; and a negative converted voltage output terminal.

The present application discloses a direct current (DC) converter including a voltage divider for dividing a voltage provided by a DC voltage source, having a positive DC voltage input terminal, a negative DC voltage input terminal, and a divided voltage output terminal; a conversion circuit having a first switch, a second switch, an inductor unit, a first unidirectional conductor, and a second unidirectional conductor; a positive converted voltage output terminal; and a negative converted voltage output terminal.

The described embodiments include an apparatus that controls voltages for an integrated circuit chip having a set of circuits. The apparatus includes a switching voltage regulator separate from the integrated circuit chip and two or more low dropout (LDO) regulators fabricated on the integrated circuit chip. During operation, the switching voltage regulator provides an output voltage that is received as an input voltage by each of the two or more LDO regulators, and each of the two or more LDO regulators provides a local output voltage, each local output voltage received as a local input voltage by a different subset of circuits in the set of circuits.