Automatic buck/boost mode selection system for dc-dc converter

A DC-DC converter controller comprising:

• a switch module configured to receive an input voltage and one or more switch control signals and output of output voltage;
• at least one signal generator configured to generate one or more time varying signals;
• an error signal generator configured to compare the output voltage to a reference voltage and generate a control signal;
• a pulse generator configured processes the one or more time varying signals and the control voltage to generate a boost mode signal and a buck mode signal;
• and
• control logic configured to receive and processes the boost mode signal and a buck mode signal to generate switch control signals, the switch control signals being provided to the switch module to control a position of one or more switches in the switch module to establish the output voltage.

A DC-DC converter with controller comprising:

• a DC-DC converter with two or more switches, the DC-DC converter configured to convert an input voltage to an output voltage based on switch control signals;
• a pulse generator configured to process a time varying signal and an error signal to generate a boost mode signal and a buck mode signal, the error signal based on the output voltage;
• and
• control logic configured to process the boost mode signal, the buck mode signal, or both, to generate switch control signals, the switch control signal configured to establish buck mode or boost mode by establishing switch positions for the two or more switches in the controller.