A switch circuit is configured of a first semiconductor element and a second semiconductor element connected in series, and receives a DC voltage of 100 V or more. The drive circuit causes the first semiconductor element or the second semiconductor element to perform a switching operation. The isolated power supply circuit converts a predetermined power supply voltage into an isolated first power supply voltage, and outputs the first power supply voltage to the drive circuit. The isolation signal converter converts a first signal of 6 MHz or more into an isolated first drive signal, and outputs the first drive signal to the drive circuit. The single substrate mounts the isolated power supply circuit and the isolation signal converter. Both the first semiconductor element and the second semiconductor element are wide bandgap semiconductor elements.

A vehicle-mounted power supply system includes a sampling circuit, a voltage comparison control circuit, a power conversion circuit, and a motor. The sampling circuit is configured to obtain an output voltage value of an output terminal of the power conversion circuit. The voltage comparison control circuit is configured to output a first power adjustment signal to the power conversion circuit when the output voltage value is less than a first target voltage value. The power conversion circuit is configured to increase an output voltage to a first target voltage based on the first power adjustment signal, to output the output voltage to the motor and increase an input voltage of the motor. When a voltage of a power supply is low, the input voltage of the motor can be maintained at a required level.

A data center rack is disclosed. The data center rack comprises a plurality of chamber openings including computing devices; and at least one chamber opening including a mounted ultracapacitor module comprising a plurality of ultracapacitors. A data center comprising a data center rack is also disclosed.

A controller of a switching converter includes an error amplifying circuit, a first comparison circuit, a valley detection circuit, a valley selection circuit and a frequency control circuit. The error amplifying circuit generates a compensation signal based on the difference between a reference signal and a feedback signal. The first comparison circuit compares the compensation signal with a modulation signal and generates a pulse frequency modulation signal. The valley detection circuit detects valleys of a resonant voltage of the switching converter and generates a valley pulse signal. The valley selection circuit generates a valley enable signal corresponding to a target valley number based on the pulse frequency modulation signal and the valley pulse signal. The frequency control circuit generates a frequency control signal to control the switching frequency of the first switch based on the valley enable signal and the valley pulse signal.

A controller of a switching converter includes an error amplifying circuit, a first comparison circuit, a valley detection circuit, a valley selection circuit and a frequency control circuit. The error amplifying circuit generates a compensation signal based on the difference between a reference signal and a feedback signal. The first comparison circuit compares the compensation signal with a modulation signal and generates a pulse frequency modulation signal. The valley detection circuit detects valleys of a resonant voltage of the switching converter and generates a valley pulse signal. The valley selection circuit generates a valley enable signal corresponding to a target valley number based on the pulse frequency modulation signal and the valley pulse signal. The frequency control circuit generates a frequency control signal to control the switching frequency of the first switch based on the valley enable signal and the valley pulse signal.

A driver circuit for low voltage differential signaling, LVDS, includes a phase alignment circuit including an input configured to receive an input signal, a first output configured to provide an internal signal as a function of the input signal, and a second output configured to provide an inverted internal signal, which is the inverted signal of the internal signal, and an output driver circuit coupled to the phase alignment circuit, the output driver circuit including a first input configured to receive the internal signal, a second input configured to receive the inverted internal signal, a first output configured to provide an output signal as a function of the internal signal and a second output configured to provide an inverted output signal which is the inverted signal of the output signal. Therein the phase alignment circuit is configured to provide the inverted internal signal with its phase being aligned to a phase of the internal signal.

A driver circuit for low voltage differential signaling, LVDS, includes a phase alignment circuit including an input configured to receive an input signal, a first output configured to provide an internal signal as a function of the input signal, and a second output configured to provide an inverted internal signal, which is the inverted signal of the internal signal, and an output driver circuit coupled to the phase alignment circuit, the output driver circuit including a first input configured to receive the internal signal, a second input configured to receive the inverted internal signal, a first output configured to provide an output signal as a function of the internal signal and a second output configured to provide an inverted output signal which is the inverted signal of the output signal. Therein the phase alignment circuit is configured to provide the inverted internal signal with its phase being aligned to a phase of the internal signal.

A Buck constant voltage driver and an application circuit thereof, are disclosed. In the Buck constant voltage driver, the peripheral structure is remained unchanged for possessing the advantages of low cost and simplicity of the prior art. Meanwhile, in order to compensate the difference of output voltage caused by the change of the forward voltage drop under different output currents, an output voltage compensation module is added to the Buck constant voltage driver. The output voltage compensation module is operable to acquire an output current information based on the sampling voltage on the sampling resistor, and to compensate the preset first reference voltage according to the output current information, thus maintaining the output voltage of the Buck constant voltage driver constant, under different output current conditions.

A voltage regulator with dynamic voltage and frequency tracking is shown. The voltage regulator has power switches converting an input voltage into an output voltage, a control loop, a voltage comparator, and a target voltage generator. The control loop is coupled to the power switches to control the power switches to perform voltage regulation. The voltage comparator compares the output voltage to the target voltage to generate a first control signal to control the control loop. The target voltage generator generates the target voltage for the voltage comparator based on the frequency difference between the target frequency and the critical-path-related frequency, wherein the critical-path-related frequency depends on the output voltage. The power efficiency and response time are improved.

A switching mode power supply preventing a first switch from being falsely triggered. The switching mode power supply detects a peak of an input signal and starts timing a period of time since the arrival of the peak of the input signal is detected. The first switch starts performing the on and off switching operations when the period of time expires.