Abstract: The disclosure discloses an absorption circuit which is coupled to a switching power supply, wherein the absorption circuit comprises: a switching power supply voltage spike suppression circuit for changing a voltage spike of the switching power supply into a desired voltage spike, an energy storage circuit which is coupled to the switching power supply voltage spike suppression circuit and used for storing the spike voltage that is suppressed, and a release circuit which is coupled to the energy storage circuit and used for, when the voltage stored by the energy storage circuit is higher than the output voltage of the switching power supply, releasing the energy which is stored by the energy storage circuit and higher than the output voltage to the output terminal of the switching power supply. The disclosure further discloses a corresponding switching power supply and a liquid crystal display driving circuit.

Abstract: The present disclosure provides a soft-start power supply circuit, a method for controlling the same, and a display device. The soft-start power supply circuit includes: a soft-start circuitry configured to pull up a potential of a feedback voltage terminal to a potential of an input voltage terminal during a first phase of an operating cycle and to pull down the potential of the feedback voltage terminal to a potential of a ground terminal during a second phase of the operating cycle; a feedback operation circuitry configured to control a driving circuitry to be turned off during the first phase and control the driving circuitry to be turned on and off alternately during the second phase; a driving circuitry configured to, in an on state, output a signal of the input voltage terminal after rectifying and filtering by a rectifying and filtering circuitry to an output voltage terminal.

Abstract: The disclosure discloses an absorption circuit which is coupled to a switching power supply, wherein the absorption circuit comprises: a switching power supply voltage spike suppression circuit for changing a voltage spike of the switching power supply into a desired voltage spike, an energy storage circuit which is coupled to the switching power supply voltage spike suppression circuit and used for storing the spike voltage that is suppressed, and a release circuit which is coupled to the energy storage circuit and used for, when the voltage stored by the energy storage circuit is higher than the output voltage of the switching power supply, releasing the energy which is stored by the energy storage circuit and higher than the output voltage to the output terminal of the switching power supply. The disclosure further discloses a corresponding switching power supply and a liquid crystal display driving circuit.

Abstract: The present disclosure provides a soft-start power supply circuit, a method for controlling the same, and a display device. The soft-start power supply circuit includes: a soft-start circuitry configured to pull up a potential of a feedback voltage terminal to a potential of an input voltage terminal during a first phase of an operating cycle and to pull down the potential of the feedback voltage terminal to a potential of a ground terminal during a second phase of the operating cycle; a feedback operation circuitry configured to control a driving circuitry to be turned off during the first phase and control the driving circuitry to be turned on and off alternately during the second phase; a driving circuitry configured to, in an on state, output a signal of the input voltage terminal after rectifying and filtering by a rectifying and filtering circuitry to an output voltage terminal.