Phase tracking pulse generation circuit and power supply device

A power supply device, comprising a phase tracking pulse generation circuit, wherein the phase tracking pulse generation circuit comprises a constant current circuit, a peak voltage circuit, a pulse rising edge extraction circuit, a switch circuit, a charge and discharge circuit, and a comparison circuit;

• the pulse rising edge extraction circuit is configured to receive a drive pulse output by a first power supply, the comparison circuit is configured to output a phase tracking pulse to a second power supply, the constant current circuit is connected to the peak voltage circuit and the charge and discharge circuit respectively, the pulse rising edge extraction circuit is connected to the switch circuit, the switch circuit is connected to the charge and discharge circuit and the comparison circuit respectively, and the charge and discharge circuit is connected to the comparison circuit;
• wherein, the constant current circuit is configured to generate a constant current, and charge the charge and discharge circuit;
• the pulse rising edge extraction circuit is configured to extract the drive pulse of the first power supply, and control on and off of the switch circuit according to the drive pulse;
• the switch circuit is configured to control the charge and discharge circuit to discharge when the switch circuit is turned on;
• the charge and discharge circuit is configured to provide a first voltage to the comparison circuit during charge or discharge;
• the peak voltage circuit is configured to extract a peak voltage of the charge and discharge circuit, adjust the peak voltage to obtain a second voltage, and output the second voltage to the comparison circuit;
• and
• the comparison circuit is configured to compare the first voltage with the second voltage and output the phase tracking pulse,
• wherein the peak voltage circuit comprises a peak sampling unit and a voltage regulation unit;
• the peak sampling unit is connected to the constant current circuit, the charge and discharge circuit, and the voltage regulation unit respectively, and the voltage regulation unit is connected to the comparison circuit.