DC-to-DC converter and configurable output magnitude and polarity

A DC-to-DC converter, the converter comprising:

• an input configured to receive a DC input voltage from a DC voltage source;
• an output having a positive rail and a negative rail, wherein the negative rail is configured for connection to a negative terminal of the DC input voltage source;
• a bypass capacitor having first end connected to a first node and a second end connected to a second node;
• two coupled inductors, the two coupled inductors including a first inductor that has a first end connected to the input and a second end connected to the first end of the bypass capacitor at the first node, the two coupled inductors also including a second inductor that has a first end connected to the second end of the bypass capacitor at the second node and a second end connected to a third node;
• a first switch connected between the first node and the negative rail;
• a second switch connected between the second node and the positive rail;
• a third switch connected between the second node and the negative rail;
• a fourth switch connected between the third node and the negative rail;
• a fifth switch connected between the third node and the positive rail;
• and
• a controller that is configured to selectively operate the first, second, third, fourth and fifth switches based on a desired magnitude and polarity of a voltage at the output;
• wherein the controller is configured to operate in a non-inverting mode at a switching frequency having a period;
• wherein in the non-inverting mode, the third and fifth switches are open, the fourth switch is closed and the first and second switches operate in a complementary manner during the period.