Control method for DC/DC converter and DC/DC converter

A DC/DC converter, comprising:

• a primary side circuit comprising a first primary side bridge arm consisting of a first switch and a second switch in series and a second primary side bridge arm consisting of a third switch and a fourth switch in series, and the first primary side bridge arm is parallel to the second primary side bridge arm;
• a secondary side circuit, electrically isolated with the primary side circuit, comprising a first secondary side bridge arm consisting of a fifth switch and a sixth switch in series and a second secondary side bridge arm consisting of a seventh switch and an eighth switch in series, and the first secondary side bridge arm is parallel to the second secondary side bridge arm;
• and
• a control apparatus comprising:
• a primary side control module, configured to provide a first primary side driving signal to drive the first switch and the fourth switch, and provide a second primary side driving signal to drive the second switch and the third switch;
• and
• a secondary side control module, configured to provide a fifth signal, a sixth signal, a seventh signal and an eighth signal to respectively drive the fifth switch, the sixth switch, the seventh switch and the eighth switch;
• wherein switches of the first secondary side bridge arm or the second secondary side bridge arm are turned on or turned off at a zero crossing point (ZCP) of a primary side current, and a driving signal of the second secondary side bridge arm has a phase shift angle with respect to that of the first secondary side bridge arm;
• and
• the first primary side driving signal is complementary to the second primary side driving signal, the fifth signal is complementary to the sixth signal, and the seventh signal is complementary to the eighth signal.