Flyback Transformer Smps

Providing with quality and standard customer-made electronic and passive components flyback transformer smps and solution products, Fullstar Electronics is a leading flyback transformer smps manufacturer and supplier in China. welcome to wholesale electronics flyback transformer smps from our factory.

A flyback transformer is the core component of a flyback Switched Mode Power Supply (SMPS), commonly used for low-power, isolated applications (typically under 100W–150W). It acts as a coupled inductor, storing energy in its magnetic field during the switch's "on" phase and transferring it to the output during the "off" phase, providing high-efficiency AC-DC conversion.

• Functionality: Unlike standard transformers, flyback transformers (often called coupled inductors) do not transfer energy simultaneously from primary to secondary. They operate as energy storage devices, often used in AC-DC converters to step down high-voltage rectified mains to low-voltage DC (e.g., 12V, 24V).
• Design & Components: The circuit typically consists of a primary switch (MOSFET), the flyback transformer (with a high-frequency ferrite core), a secondary rectifier diode, and output capacitors.
• Applications: They are ideal for low-cost, small-footprint, and isolated power supplies, such as mobile phone chargers, stand-by power supplies for PCs, and other low-power electronic equipment.
• Operational Mechanism: A switching regulator (controller IC) drives the MOSFET at high frequencies (typically tens to hundreds of kHz) to regulate the output voltage, allowing for smaller passive components (like capacitors).
• Advantages:

○ Galvanic Isolation: Provides safe separation between high-voltage mains and low-voltage outputs.

○ Low Cost/Complexity: Simple topology compared to others like Forward or Full-Bridge converters.

○ Multiple Outputs: Capable of producing multiple, isolated output voltages with one transformer.

Components and Selection:

• Ferrite Core: Chosen for high-frequency operation to keep the transformer size small.
• MOSFET: Used as a high-frequency switch, requiring a high drain-to-source voltage rating to handle voltage spikes.
• Rectifier Diode: A fast-recovery diode is needed to handle high-frequency switching.

SHAANXI FULLSTAR ELECTRONICS CO.,LTD is specialized in electronics and magnetic components .
The main products are: High-frequency transformer, Low-frequency encapsulated transformer, RF transformer, Planar transformer,High-voltage ignition transformer, SMD transformer, etc.,

Our factory has 30 years' experience in electronics field and the annual volume is above 200,000,000 pieces. We are ISO9001 certified company.

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