Systems and methods for bridge mode transition and dynamic soft start for DC-DC converter and battery charger

A method for controlling a system including a direct current (DC)-DC converter including a transformer, a bridge driver connected to a primary side of the transformer, the bridge driver including one or more switches, and a bridge rectifier connected to a secondary side of the transformer, the method comprising performing, by a controller, operations including:

• controlling the one or more switches in the bridge driver to configure the bridge driver into each of a half-bridge driver configuration and a full-bridge driver configuration based on a sensed voltage of a battery connected to the DC-DC converter and a power demand for the DC-DC converter, and to transition between the half-bridge driver configuration and the full-bridge driver configuration while the DC-DC converter is outputting power,
• wherein the operations further include ramping a current loop compensator output frequency lower limit from a maximum to a minimum with a predetermined soft start rate, and
• wherein the operations further include maintaining a fixed duty cycle for the one or more switches with the predetermined soft start rate, and varying a switching frequency of the one or more switches with the predetermined soft start rate.

A non-transitory computer readable medium storing instructions that, when executed by one or more processors, perform operations including:

• controlling one or more switches in a bridge driver of a DC-DC converter to configure the bridge driver into each of a half-bridge driver configuration and a full-bridge driver configuration based on a sensed voltage of a battery connected to the DC-DC converter and a power demand for the DC-DC converter, and to transition between the half-bridge driver configuration and the full-bridge driver configuration while the DC-DC converter is outputting power,
• wherein the operations further include ramping a current loop compensator output frequency lower limit from a maximum to a minimum with a predetermined soft start rate, and
• wherein the operations further include maintaining a fixed duty cycle for the one or more switches with the predetermined soft start rate, and varying a switching frequency of the one or more switches with the predetermined soft start rate.