Power electronics device with improved isolation performance

A power electronics device comprising:

• an insulating substrate including a cavity, a first channel, and a second channel, the first channel and the second channel each being connected to the cavity;
• a single magnetic core located in the cavity;
• one or more electrical windings passing through the insulating substrate and wound around the magnetic core;
• primary side electrical components located on a first region of a principal surface of the insulating substrate;
• secondary side electrical components located on a second region of the principal surface of the insulating substrate;
• and
• an isolation region located on the principal surface of the insulating substrate between the first region and the second region that electrically isolates the first region from the second region, wherein a minimum isolation distance is provided between the first region and the second region;
• wherein
• the first channel extends from the cavity to a first channel opening at an outside edge of the insulating substrate, and, when viewed along a thickness direction of the insulating substrate, the isolation region completely overlaps the first channel;
• the second channel extends from the cavity to a second channel opening at the outside edge of the insulating substrate, and, when viewed along the thickness direction of the insulating substrate, the isolation region completely overlaps the second channel;
• the first channel extends from the cavity to the outside edge of the insulating substrate in a direction parallel or substantially parallel to an edge of the isolation region and perpendicular or substantially perpendicular to the outside edge of the insulating substrate;
• the second channel extends from the cavity to the second channel opening in a direction parallel or substantially parallel to a direction in which the first channel extends from the cavity to the first channel opening;
• the insulating substrate is rectangular or substantially rectangular with shorter sides located along a lengthwise direction of opposing edges of the insulating substrate and longer sides located along a widthwise direction between the first region of the principal surface of the insulating substrate and the second region of the principal surface of the insulating substrate, the widthwise direction being perpendicular or substantially perpendicular to the lengthwise direction;
• the first channel extends in a direction parallel or substantially parallel to the lengthwise direction, and the first channel opening is located at one of the longer sides of the insulating substrate;
• the second channel extends in the direction parallel or substantially parallel to the lengthwise direction, and the second channel opening is located at another of the longer sides of the insulating substrate;
• the minimum isolation distance is equal or substantially equal to the sum of:
• distance C defined as a shortest distance from the first region to the first channel opening;
• distance D defined as a distance along a first channel wall from the first channel opening to the magnetic core;
• distance E defined as a distance along a second channel wall from the magnetic core to the first channel opening;
• and
• distance F defined a shortest distance from the first channel opening to the second region;
• and
• distance C is greater than distance D, and distance F is greater than distance E.