Isolation transformer for use in isolated DC-to-DC switching power supply

摘要

An isolated DC-to-DC switching power supply includes an isolation transformer having a magnetic core, a first winding around the magnetic core, a first winding-shield around the magnetic core, a second winding-shield within the first winding-shield, and a second winding within the second winding-shield. There is no direct coupling between the first winding and the second winding since the second winding is enclosed within the second winding-shield and the second winding-shield is enclosed within the first winding-shield.

主权项

1. An isolated DC-to-DC switching power supply, comprising:
an isolation power transformer including:
a magnetic core;a first winding around the magnetic core;a first electrostatic winding-shield around the magnetic core;a second electrostatic winding-shield within the first electrostatic winding-shield; anda second winding within the second electrostatic winding-shield,such that the first winding electrostatically couples to the first electrostatic winding-shield and the second winding electrostatically couples to the second electrostatic winding-shield, such that there is no charge flow between the first electrostatic winding-shield and the second electrostatic winding-shield; and wherein each of the first winding, the first electrostatic winding-shield, the second electrostatic winding-shield and the second winding are affixed to a printed circuit board.