Dc-dc converter using parallel point-of-load integrated circuits

A converter comprising:

• first and second input terminals;
• a first stage that is connected to the first and the second input terminals and that includes a first-stage integrated circuit (IC), the first-stage IC includes a feedback terminal;
• first and second half-bridge circuits that are connected in parallel and that receive an input voltage from the first stage, each of the first and the second half-bridge circuits includes a half-bridge IC that receives a clock signal from the first stage;
• a transformer that includes:
• a single magnetic core;
• a first primary winding that extends around the single magnetic core and that is connected to the first half-bridge circuit;
• a second primary winding that extends around the single magnetic core and that is connected to the second half-bridge circuit;
• and
• a secondary winding that extends around the single magnetic core;
• a rectifier connected to the secondary winding;
• first and second output terminals connected to the rectifier;
• and
• a feedback circuit connected between the first output terminal and the feedback terminal of the first-stage IC.