Driving circuit, converter and switching power supply

The invention is suitable for the field of switching power supplies, and provides a driving circuit, a converter and a switching power supply. A first logic module of the driving circuit receives a control signal and outputs a first logic signal. The first switch module outputs a first driving signal to a power tube in the converter according to the first logic signal, so that the power tube is in a conduction process or a turn-off process. The detection module receives the first signal and the first logic signal, detects whether the power tube ends the Miller platform according to the first signal, and outputs a first control signal according to the first signal and the first logic signal when the Miller platform ends. The second logic module outputs a second logic signal according to the first control signal. And the second switch module outputs a second driving signal to the power tube according to the second logic signal, so that the power tube is completely turned on or turned off. According to the drivi