Resonant converter, control method of resonant converter, and related device

A power supply device, comprising:

• a rectifier and a resonant converter;
• the rectifier is configured to:
• convert an alternating current externally connected to the power supply device into a first direct current, and
• provide the first direct current to the resonant converter;
• and
• the resonant converter is configured to:
• convert the first direct current into a target direct current, and
• provide the target direct current to a load of the power supply device;
• the resonant converter comprises a control circuit, a drive circuit, and a switch circuit, and the control circuit is connected to the switch circuit through the drive circuit;
• the control circuit is configured to:
• generate a first pulse signal and a second pulse signal based on a target output electrical parameter of the resonant converter, wherein a frequency of the first pulse signal is greater than or equal to a frequency of the second pulse signal;
• obtain a first drive signal based on the first pulse signal and the second pulse signal, and send the first drive signal to the drive circuit;
• the drive circuit is configured to:
• convert the first drive signal into one or more second drive signals, and
• send the one or more second drive signals to the switch circuit;
• and
• the switch circuit is configured to turn on or off a switch component in the switch circuit based on the one or more second drive signals.