Switching Transformers

Purpose: Used in switch-mode power supplies (SMPS) to transfer energy at high frequencies (typically 20 kHz – 1 MHz).

Key Features:

• High-frequency operation enables smaller size and higher efficiency.
• Core materials: Ferrite (most common), powdered iron, or amorphous alloys.
• Designed for minimal core loss and leakage inductance.
• Isolation between primary and secondary windings for safety.

Applications: AC-DC adapters, DC-DC converters, LED drivers, telecom power systems.

Design Considerations:

• Turns ratio defines voltage transformation.
• Adequate insulation for required isolation voltage.
• Thermal management under full load.
• EMI reduction via shielding or interleaved windings.