According to energy transmission, DC/DC converters have two types: one-way transmission and two-way transmission. A DC/DC converter with bidirectional transmission function can transmit power from the power supply side to the load side, and can also transmit power from the load side to the power supply side.

DC/DC converters can also be divided into self-excited and separately controlled types. A converter that uses the positive feedback signal of the converter itself to realize self-sustaining periodic switching of the switch tube is called a self-excited converter. For example, the Loyer converter is a typical push-pull self-excited converter. The control signal of the switching device in the separately controlled DC/DC converter is generated by an external specialized control circuit.