What is a Flyback Transformer?
Flyback transformer or LoT (Line output transformer) is a coupled inductor with a gapped core where two coils are coupled by a common magnetic field with more core gap between the two coils. This transformer operates in the principle of flyback topology.
In flyback topology, when the transistor switch is ON, the current starts to flow through the primary winding, leading to energy storage in the core of the flyback transformer. At this time, the induced voltage across the secondary winding reverse biases the diode. Hence, the diode is in the OFF state, so there is no energy transferred to load during the ON state of the transistor switch. When the transistor switch is OFF, the magnetic field in the core will collapse resulting in secondary voltage polarity reverses, thus, forward biasing the diode. The forward-biased diode act as a rectifier to transfer energy from the secondary to load. The duty cycle of the switch decides the energy storage in the core, which decides the output voltage.
Key features of Flyback Transformers:
- Provides both galvanic isolation and voltage transformation
- Reduces ripple current
- Provides a cost-effective solution for isolated power supply design
- Flyback transformer offers low leakage inductance (perfect magnetic coupling of the windings)
Flyback transformers are ideal for use in isolated DC-DC power supplies, telecom, LED lighting, isolated AC-DC power supplies, power over Ethernet (PoE), capacitor charging, battery charging, solar microinverters, test and measurement equipment, and automotive applications.
Flyback Transformers from the leading manufacturers are listed on everything PE. Our parametric search tool will scan multiple manufacturer websites to identify Flyback Transformers that meet your requirement. You can then download datasheets, request quotations via everything PE. Your inquiry will be routed to the manufacturer or their representative who will give you more information on the product.
