Switch driving circuit, power converter and charger

The utility model provides a switch driving circuit, a power converter and a charger, and belongs to the technical field of power electronics. The switch driving circuit comprises a control signal input end, a driving output end, a current-limiting resistor and an acceleration unit, the current-limiting resistor and the acceleration unit are connected between the control signal input end and the driving output end in parallel, and the driving output end is connected with a grid electrode end of a power switch. The acceleration unit comprises an acceleration conduction resistor and an acceleration capacitor which are connected in series, and the resistance value of the acceleration conduction resistor is smaller than that of the current-limiting resistor. The switch driving circuit realizes rapid conduction based on the acceleration unit, so that the switching frequency of the power switch is improved, and the switching loss is reduced. When the switch driving circuit is applied to the power converter, the siz