Abstract: The present application discloses a reference voltage circuit with temperature compensation, in which a voltage with a positive temperature coefficient is provided by a current source and an impedance device, and in the meanwhile, a voltage with a negative temperature coefficient is provided by a voltage source. Hereby, the reference voltage circuit according to the invention provides a reference voltage with temperature compensation at an output terminal.

Abstract: The present invention is a switching circuit driving method for power converters and its driving module. Such driving method and driving module can avoid the occurrence of valley jumping by replacing the original blanking time with a front blanking time or a back blanking time when a valley jumping occurs in the system, and avoid the noise problem caused by valley jumping.

Abstract: A DC-DC buck converter includes a buck conversion circuit, a PWM control circuit and a light-load control circuit. A switching circuit in the buck conversion circuit includes multiple upper switching elements and lower switching elements. The PWM control circuit is coupled to the buck conversion circuit and output a control signal to control the upper and lower switching elements. The light-load control circuit, coupled to the PWM control circuit and the buck conversion circuit for receiving an output voltage, the control signal and a light-load threshold value. The light-load control circuit is provided to determine whether the DC-DC buck converter is in a light load state and turn off at least one of the upper switching elements and at least one of the lower switching elements in the light load state.

Abstract: A DC-DC buck converter includes a buck conversion circuit, a PWM control circuit and a light-load control circuit. A switching circuit in the buck conversion circuit includes multiple upper switching elements and lower switching elements. The PWM control circuit is coupled to the buck conversion circuit and output a control signal to control the upper and lower switching elements. The light-load control circuit, coupled to the PWM control circuit and the buck conversion circuit for receiving an output voltage, the control signal and a light-load threshold value. The light-load control circuit is provided to determine whether the DC-DC buck converter is in a light load state and turn off at least one of the upper switching elements and at least one of the lower switching elements in the light load state.