Farnell stocks bridgeless PFC based on BARBI topology
Using ST Microelectronics’ BARBI technology, the EVL4986A-1KWBL demonstration board serves as a bridgeless PFC pre-regulator capable of delivering 1kW output power (400Vdc) and an input of 90 to 265V AC at 45 to 65Hz. The EVL4986A-1KWBL features the L4986 CCM PFC controller, STW69N65M5 power MOSFET, STPSC12065 SiC diode and PM8834 dual LS gate driver from ST Microelectronics. Würth Elektronik provides the 750319521 PFC boost inductor, WCAP-FTBE and WCAP-FTX2 film capacitors, and the WE-CMBNC common mode power line choke.
BARBI is a bridgeless power factor correction (PFC) topology that improves efficiency and power density. It allows developers to remove the conventional four-diode bridge rectifier with two MOSFETs working as synchronous rectifier to boost the efficiency. Despite the bridgeless approach, it can still be controlled with an analogue controller and does not require complex transistor driving circuit since the switches are driven with LS gate-drivers.
The double boost topology (BARBI) based EVL4986A-1KWBL demonstration board can serve as a front-end converter for up to 1kW. It is designed to meet the IEC61000-3-2 and JEITA-MITI standards. It also meets Class-A EMI compliance with EN55022 Class-B and safety compliance with EN62368.
Other key features to note include an output voltage / load of 400V / 2.5A and efficiency above 98 per cent at 230V AC (full load), above 95.5 per cent at 115V AC (full load) and above 94 per cent between 10 and 100 per cent of full load.
It has low no-load mains consumption of below 250mW at 230V AC.
The double-sided PCB is made of 70 micron FR-4 with a mixed through hole and surface mount design. Dimensions are 145 x 160mm with a height of 35mm
The board can be used in industrial and medical switch mode power supplies, high-power LED luminaries, consumer electronics and server power supplies. The L4986 controller provides a low-component count solution with high efficiency and low THD performance in all operating conditions, added Farnell.
The EVL4986-1KWBL demonstration board is available from stock at Farnell in EMEA, Newark in North America and element14 in APAC.
