The low-power (milliwatt) flyback transformer used in a switched-mode power supply (SMPS) needs to be designed with a gap in the magnetic path for maximum power delivery over temperature.

6. In this transformer schematic (left) and equivalent circuit (right), the magnetizing current is flowing through an imaginary inductor, LM, in parallel with the primary.

Vishay Intertechnology Inc., has introduced a versatile new planar transformer designed for switchmode power supply (SMPS) applications, including flyback, forward, push-pull, and half-bridge ...