Synchronization regulation power supply convertor and synchronization regulation circuit

The present invention discloses a synchronous regulating power converter. A secondary side switching circuit is coupled with the output end of the power converter, used for generating pulse signal and synchronous signal according to the feedback signal. An isolating device is coupled with the secondary side circuit, used for transmitting the synchronous signal to the primary side of the power converter from the secondary side. The primary side switching circuit generates a plurality of switching signals according to the synchronous signal to switch the primary side winding of a transformer. A synchronous switch has a power switch block and a control circuit. The secondary side winding of the transformer is coupled to the output end of the power converter, and receives the pulse signal to turn on/off the power switch block according to the polarity of the pulse signal. The feedback signal is associated with the output end of the power converter, and the pulse signal is generated for correcting and regulating the power converter.