Power Electronics
Fly-Buck Converter Transformers

Fly-Buck Converter Transformers

Premier Magnetics has introduced a line of transformers specifically designed to complement the Texas Instruments LM5017 family of Fly-Buck™ converters. The Premier Magnetics Fly-Buck transformers' topology and electrical characteristics are designed to provide fast and simple implementation of the Fly-Buck circuit for two or four isolated outputs. The devices feature 1500 Vrms isolation, and their low-leakage inductance and low inter-winding capacitance contribute to improved overall power conversion efficiency. For example, the TI LM5017 demo board utilizing a Premier Magnetics TSD-3425 transformer has a demonstrated efficiency of greater than 90%.

Expanding Premier's popular TSD Series, the models in the Fly-Buck series are offered to support three popular Fly-Buck circuit configurations. All handle 15-40 Vac inputs and frequencies up to 600 kHz. 

  • The Model TSD-3424, in an EP13 package, provides quad outputs (2x [email protected] mA / 2x [email protected] mA)
  • The dual output TSD-3425 ([email protected] mA / [email protected] mA) and TSD-3426 ([email protected] mA / [email protected] mA) are each in a smaller EP10 package.

The "Fly-Buck" circuit developed by TI offers design and board space advantages in power supply designs by utilizing a synchronous buck converter with coupled transformer windings to create isolated outputs. In contrast, traditional "flyback" converter circuitry requires optocouplers or auxiliary windings for feedback regulation and is bulky and complex to design. The Fly-Buck circuit is a cost-effective solution in a wide range of end use applications requiring ac/dc or dc/dc conversion, including process control, instrumentation, solar, telecom and military.

Price:             $0.48 - $0.52 in OEM quantities

Availability:   Samples in stock for immediate delivery

Delivery:        8 weeks, ARO for OEM quantities       

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