Dual-port power delivery systems enabling enhanced port power capacity

A Universal Serial Bus Power Delivery (USB-PD) dual-port power delivery system, comprising:

• an input source configured to provide an input current;
• a first secondary-side controlled flyback converter and a second secondary-side controlled flyback converter each operatively coupled to the input source, wherein the first secondary-side controlled flyback converter and the second secondary-side controlled flyback converter each comprise:
• a primary side comprising a direct current (DC) output component configured to convert the input current into a DC output, a power switch, and a primary-side controller operatively coupled to the power switch;
• a secondary side comprising a secondary-side controller, a current rectification component, and a load switch;
• a flyback transformer operatively coupled to the primary side and the secondary side;
• and
• a pulse transformer operatively coupled to the primary side and the secondary side;
• a first port operatively coupled to the first secondary-side controlled flyback converter;
• a second port operatively coupled to the second secondary-side controlled flyback converter;
• a power sharing component comprising a first power sharing transistor associated with the first port and a second power sharing transistor associated with the second port, wherein the first power sharing transistor is coupled to the load switch of the first secondary-side controlled flyback converter, and wherein the second power sharing transistor is coupled to the load switch of the second secondary-side controlled flyback converter;
• and
• at least one power delivery controller associated with the first port and the second port and configured to:
• determine that the first port is an idle port, and the second port is a non-idle port attached to an electronic device;
• and
• in response to determining that the first port is an idle port and the second port is a non-idle port, cause an enhanced port power capacity to be allocated to the second port by enabling power sharing via the power sharing component, wherein enabling the power sharing via the power sharing component comprises turning on the first power sharing switch and the second power sharing switch to short together a first bus voltage output of the first converter and a second bus voltage output of the second converter such that power from the first converter supplements power delivered by the second converter to the second port, and wherein the enhanced port power capacity is greater than 70 Watts.