The FSFR series from Fairchild is a complete integrated circuit with controller, high/low side drivers and two MOSFETs. It forms the main building block of a half-bridge LLC resonant converter.
LLC resonant converters are used in power supplies from 100 W to 1 kW and feature efficiencies above 90%. They work best with a narrow input voltage range, for example 195 V a.c. to 265 V a.c., or alternatively with a front end power factor correction (PFC) stage.
Standard series resonant converters have excellent full-load efficiency, but suffer from reduced efficiency at lighter loads as the switching frequency increases greatly. LLC resonant converters are a simple development of series resonant converters. Series resonant converters use one inductor (L) and one capacitor (C). LLC converters use a second, uncoupled inductor to greatly reduce the dependency of the switching frequency on the load. They are therefore highly efficient at a wide range of loads.
In the FSFR family, the method of switching is zero voltage switching (ZVS), which results in very low EMI and very high efficiency. The diodes in the MOSFETs have fast recovery times which allows small dead-bands in the switching cycles, further improving efficiency. In addition to the LLC resonant converter, the FSFR family can be applied to series resonant converters and parallel resonant converters.
The devices feature variable frequency control with 50% duty cycle for half-bridge resonant converter topologies, fast recovery times of the internal MOSFETs and a fixed dead time of 350 ns. They implement pulse skipping for frequency limit at light load conditions, offer remote ON/OFF control and integrate protection functions such as over-voltage, overload, over-current and thermal shutdown.
Typical applications include industrial power supplies, telecom power supplies, audio power, LCD and PDP television sets, industrial PCs and servers, and power adapters.
High-voltage IGBT Hi-Q Electronics
Power Electronics / Power Management
Diotec Semiconductor has launched the DIW030M060 IGBT, a 600 V, 30 A device with a built-in reverse diode.
Read more...DC converter for Hi-Rel applications Vepac Electronics
Power Electronics / Power Management
The MFK2812S from Crane Aerospace & Electronics is a DC-DC converter with an input voltage range of 16 to 50 V and an output of 12 V at up to 2,08 A.
Read more...Distributed Energy Resource Management Systems Schneider Electric South Africa
Power Electronics / Power Management
In addition to grid stability, DERMS also play a role in energy trading with some countries leveraging DERMS for real-time energy trading.
Read more...BYD introduces new energy storage solutions
Power Electronics / Power Management
BYD Energy Storage, a business division of BYD, has introduced the new BYD Battery-Box LV5.0+ at the recent Solar & Storage Live Africa in Johannesburg.
Read more...Micro energy harvesting
Power Electronics / Power Management
Panasonic Industry and Miromico partner to show effective micro energy harvesting for industrial applications.
Read more...Versatile 20 W PSU Brabek
Power Electronics / Power Management
The new RAC20NE-K/277/EPID series from RECOM have a wide 85 to 305 V AC input range and deliver a full 20 W output power without derating.
Read more...Battery monitoring and balancing IC EBV Electrolink
Power Electronics / Power Management
The TLE9009DQU from Infineon is a multi-channel battery monitoring and balancing IC crafted for Li-Ion battery packs.
Read more...New compact AC-DC PSU series Vepac Electronics
Power Electronics / Power Management
COSEL has announced the expansion of its medical power offering with the addition of the new UMA series, the first three models being the 30 W UMA30F, the 60 W UMA60F and the 120 W UMA120F.
Read more...KIOXIA pioneer new 3D Flash technology EBV Electrolink
DSP, Micros & Memory
KIOXIA Corporation and Sandisk Corporation have pioneered a state-of-the-art 3D flash memory technology, setting the industry benchmark with a 4,8 Gb/s NAND interface speed, superior power efficiency, and heightened density.
Read more...Super-fast H.264 encoder FPGA core EBV Electrolink
DSP, Micros & Memory
An ITAR-compliant H.264 core designed for AMD FPGAs provides baseline H.264 support and is currently the smallest and fastest FPGA core in the industry.
printer friendly version