Control device for a DC-DC converter, DC-DC converter, and method for controlling a DC-DC converter

A control device (100) for a DC-DC converter (110) comprising a plurality of DC-DC transducer modules (120_i), with different maximum output powers, connected in parallel on an output side, the control device (100) comprising:

• a first ascertaining unit (130) for ascertaining a total degree of utilization (G_tot) of the DC-DC converter (110) based on output currents (I_i) of the DC-DC transducer modules (120_i), output voltage (U_i) of the DC-DC transducer modules (120_i), and respective maximum powers (P_i) of each of the DC-DC transducer modules (120_i), wherein the respective maximum powers (P_i) of each of the DC-DC transducer modules (120_i) are a maximum output power the DC-DC transducer modules (120_i) are capable of outputting,
• a plurality of utilization ascertaining units (140_i), wherein each DC-DC transducer module (120_i) is assigned a utilization ascertaining unit (140_i), for ascertaining the degree of utilization (G_i) of the assigned DC-DC transducer module (120_i) based on the respective maximum power (P_i) of the assigned DC-DC transducer module (120_i) and at least one selected from a group consisting of the output current (I_i) of the assigned DC-DC transducer module (120_i) and the output voltage (U_i) of the assigned DC-DC transducer module (120_i),
• a plurality of utilization equalizing controllers (150_i), wherein each DC-DC transducer module (120_i) is assigned a utilization equalizing controller (150_i), and the utilization equalizing controllers (150_i) are each configured to generate a setpoint current value (Is_i) for the respectively assigned DC-DC transducer module (120_i) based on the ascertained total degree of utilization (G_tot) as setpoint value and the degree of utilization (G_i) as actual value.