Vishay Intertechnology has launched a new resonant transformer for inductor-inductor-capacitor (LLC) applications that features the transformer and an integrated inductor in a single package.
Designed to save PCB space while simplifying layouts and reducing component mounting requirements, the 5.5 kW Vishay Custom Magnetics MRTI5R5EZ offers fully adjustable magnetization and leakage inductance with minimal parasitic variation.
The device launched today is the first transformer of its kind to utilize a second intermediate transformer leg to complete the resonant inductor portion of the circuit.
Other implementations require an additional magnetic core to provide the same performance. This unique construction not only saves space, but also simplifies designs by eliminating the need for interconnects or jumpers from the resonant inductor to the transformer winding.
The MRTI5R5EZ will be used in onboard chargers and in half-bridge and full-bridge resonant power supply transformers in industrial controls, solar inverters, and military, avionics, and construction equipment. In addition to providing a customizable turns ratio for these applications, transformer losses can be moved from the core to the coil as needed to provide the best performance and heat dissipation, while its minimal parasitic variation optimizes capacitor selection.
The device has operating frequencies of 100 to 350 kHz, with rated power of 4 to 6 kW with input voltage of 400 to 800 V and rated current of up to 28 A. The rated isolation voltage for the MRTI5R5EZ is 2500 V. Transformer includes a cold plate mounting bracket with raised lugs and flush mounting options available.
M4 ring terminals are standard for the transformer, with customizable cable lengths and terminal types available, and the device can be supplied with a thermal clearance pad on the mounting surface.
Samples and production quantities of the MRTI5R5EZ are available now with lead times of four weeks for samples and 16 to 20 weeks for production quantities.