Flyback quick start driving circuit and driving method

The present invention relates to a flyback quick start driving circuit and driving method. The circuit comprises a voltage input unit, a transformer provided with a primary winding, a secondary winding and an auxiliary winding, a driving unit controlling operation of the primary winding of the transformer, a voltage pull-up unit, and a feedback control unit. The voltage pull-up unit performs a charging process according to a direct current voltage provided by the voltage input unit. An output voltage is pulled up to a start voltage and provided to the driving unit, enabling the driving unit to start operating. A driving signal is outputted, and the primary winding of the transformer is driven to operate. The auxiliary winding of the transformer produces an auxiliary winding voltage as a result. The feedback control unit obtains the auxiliary winding voltage, and according to the size of the auxiliary winding voltage, determines whether to stop the charging operation of the voltage pull-up unit. When the charging operation of the voltage pull-up unit is stopped, the feedback control unit provides the auxiliary winding voltage to the driving unit, so as to maintain continued operation of the driving unit. The present invention can quick start a load while maintaining low power loss.