Fairchild Semiconductor Minimizes Power Losses in Multi-Stage Power Supplies

CCM PFC Controller Eliminates 54 External Devices

SAN JOSE, Calif. — (BUSINESS WIRE) — March 9, 2010 — To meet ENERGY STAR® regulations and reduce their carbon footprint, power-electronic design teams continue to push efficiency towards the 100 percent rating, bringing higher system efficiency to PCs, servers, industrial power supplies and consumer electronics. Fairchild Semiconductor (NYSE: FCS) has leveraged its expertise in power to develop a CCM PFC controller for 300W to 2kW power supply designs that bring high system efficiency, high power factor and low THD. Through its high level of integration, this CCM PFC controller eliminates 54 external components.

Power Factor is an important measure of power quality and shows how efficiently energy is drawn from an AC source. With all PFC controllers striving to reach the ideal power factor (PF) of 1, Fairchild’s CCM PFC controller, the FAN6982, reaches near unity with 0.999 of PF at full load. With this, utility companies do not have to supply as much power to electronic applications. With power factor controllers like Fairchild's FAN6982, AC harmonic currents resulting from today's complex loads can be virtually eliminated, thereby allowing for a more efficient power distribution system.

Fairchild’s FAN6982 maintains high system efficiency at light load conditions to meet 20 percent load system efficiency requirements of ENERGY STAR® regulations and Climate Savers Computing Initiatives. It achieves this by reducing capacitive switching losses and by reducing the voltage conversion ratio, which results in less conduction losses in the boost switch.

This CCM PFC controller reduces external components and offers ease of design through its high level of integration. Features of the CCM PFC controller are: built-in brown-out protection, eliminating 12 components; adjustable PFC output, eliminating 17 components; RDY pin for power-on-sequence, eliminating 15 components; 30V operating voltage capability, eliminating 10 components; and PFC soft-start, eliminating 4 components – in total decreasing bill of materials (BOM) by 54 devices.

Since many AC-sourced electronic applications have a microphone, amplifier or loudspeaker, which need an accurate reproduction of sound, this controller offers exceptionally low Total Harmonic Distortion (4.6 percent at full load) which reduces these harmonics and meets class D requirements of IEC 1000-3-2. The FAN6982 does this through its switching-charge technology that senses input current and voltage directly, helping to improve PF and THD.

Fairchild Semiconductor provides the industry’s most comprehensive portfolio of products for AC-DC power supplies. From CCM PFC controllers to BCM PFC controllers, these solutions help electronics to achieve higher levels of efficiency, lower standby power and ease of design.

Price: US $0.69 in 1,000 quantity pieces

Availability: Samples available now

Delivery: 8 weeks ARO

Contact Information:

To contact Fairchild Semiconductor about this product, please go to: http://www.fairchildsemi.com/cf/sales_contacts/.

For information on other products, design tools and sales contacts, please visit: http://www.fairchildsemi.com.

Note to Editor: For a datasheet in PDF format, http://www.fairchildsemi.com/ds/FA/FAN6982.pdf

About Fairchild Semiconductor:

Fairchild Semiconductor (NYSE: FCS) – global presence, local support, smart ideas. Fairchild delivers energy-efficient, easy-to-use and value-added semiconductor solutions for power and mobile designs. We help our customers differentiate their products and solve difficult technical challenges with our expertise in power and signal path products. Please contact us on the web at www.fairchildsemi.com.

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