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.
NVDC power-path control to 1– 6 cell battery systems iCorp Technologies
Power Electronics / Power Management
SG Micro’s SGM41581 is an I2C-controlled narrow voltage direct charging buck boost charge controller designed to simplify robust power delivery in systems that must seamlessly operate from an adapter input or a battery pack.
Read more...Highly integrated 24-channel mixed signal IC EBV Electrolink
DSP, Micros & Memory
Microchip Technology has announced the LX4580, a 24-channel mixed-signal IC designed to replace multiple discrete components with a single device that supports synchronised data acquisition, fault monitoring, and motor control.
Read more...Precise, adaptive battery health-monitoring RS South Africa
Power Electronics / Power Management
New fuel gauge solution from Nordic delivers State-of-Health reporting, adaptive battery modelling, and seamless fleet observability via nRF Cloud.
Read more...Touch-enabled 32-bit MCU EBV Electrolink
DSP, Micros & Memory
Microchip’s PIC32CM PL10 microcontroller family expands the company’s Arm Cortex-M0+ portfolio, delivering a compact, low-power 32-bit platform designed for cost-sensitive embedded applications.
Read more...Compact 6 A automotive buck converter Altron Arrow
Power Electronics / Power Management
Delivering up to 6 A of continuous output current, the DCP0606Y from STMicroelectronics enables efficient regulation of low-voltage rails commonly used in modern vehicle electronics and industrial systems.
Read more...The new role of UPS technology in high-precision automation Omron Electronics
Power Electronics / Power Management
OMRON’s BU_2SW and BU_2RWL series UPS systems are engineered to offer a robust, online type power architecture designed to safeguard sensitive AC powered systems across a wide range of industries.
Read more...Rugged railway-grade DC-DC power modules iCorp Technologies
Power Electronics / Power Management
iCorp Technologies has introduced the AIPUPOWER ZCD100 and ZCD150 Series, a family of rugged DC-DC converters designed to meet the demanding electrical and environmental requirements of railway and transportation systems.
Read more...Advanced pressure monitoring sensor EBV Electrolink
Test & Measurement
The Infineon KP497 is an advanced, highly integrated digital pressure sensor designed for demanding automotive and industrial applications, with a particular focus on battery management systems.
Read more...Four-quadrant regenerative grid simulator Conical Technologies
Power Electronics / Power Management
The IT7900EP series high-performance regenerative grid simulator from ITECH is a full four-quadrant AC grid simulator capable of both sourcing and sinking power.
Read more...90 W PSU with 150% boost capability Brabek
Power Electronics / Power Management
RECOM’s cost effective REFIN2U-S90/CL DIN rail AC/DC boasts a 90 W rating with a boost capability of 150% for 4,5 seconds to allow for surge loads.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version