Rectifying and filtering circuit, electronic circuit, and electronic device

A rectifying and filtering circuit, configured to rectify and filter an alternating-current voltage, wherein the circuit comprises:

• a rectifying module, configured to:
• input the alternating-current voltage, rectify the alternating-current voltage, and output a first direct-current voltage from a first terminal of the rectifying module;
• an energy storage assembly, coupled between the first terminal and a second terminal of the rectifying module, wherein the energy storage assembly is configured to store energy under the action of the first direct-current voltage, and the second terminal of the rectifying module is grounded;
• a switching transistor, coupled between the energy storage assembly and the rectifying module, wherein the switching transistor is configured to control connection and isolation between the rectifying module and the energy storage assembly;
• a switch control module, coupled to a gate of the switching transistor, wherein the switch control module is configured to:
• compare a first direct-current signal with a first reference signal, and control on and off of the switching transistor based on a comparison result, wherein the first direct-current signal is positively correlated with a second direct-current voltage, the first direct-current voltage is positively correlated with the second direct-current voltage, and the first reference signal is positively correlated with an upper withstand voltage limit of the energy storage assembly;
• and
• a surge protection module, coupled between the switching transistor and the rectifying module, wherein the surge protection module is configured to restrict a current flowing through the switching transistor within a first threshold.