Fairchild Semiconductor's PFC/PWM Controller Provides Higher Efficiency in Dual-Switch Flyback Topologies

Highly Integrated Device Combines Functionality for Ease of Design, Reduced Component Count

SAN JOSE, Calif. – December 15, 2010 – Power engineers, especially those involved in All-In-One (AIO) PC power, Slim Pack PC adapters, LCD TV and LED lighting designs, require a dual switch flyback topology that provides the higher efficiency and increased energy savings required by government regulations – something that LLC or single flyback solutions cannot provide. Developed to answer this need, Fairchild Semiconductor’s (NYSE: FCS) FAN6920MR, an integrated critical mode PFC and quasi-resonant current mode PWM controller, meets regulatory requirements by providing >90 percent efficiency and <300mW at no load for increased power savings.

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The FAN6920MR combines a power factor correction (PFC) controller and a quasi-resonant PWM controller for a cost effective design that uses fewer external components. For PFC, the device uses a controlled on-time technique to provide a regulated DC output voltage and to perform natural power factor correction. With an innovative total harmonic distortion (THD) optimizer, the FAN6920MR can reduce input current distortion at zero-crossing duration to improve THD performance.

For PWM control, the FAN6920MR provides several functions to enhance the power system performance including extended valley detect up to the 12th valley cycle for reduced switching frequency, improved light load efficiency, green-mode operation, an internal 10ms soft start and high/low line over-power compensation.

Additionally, the device provides many protection functions including brownout, secondary-side open-loop and over-current with auto recovery, external auto-recovery protection triggering and internal over-temperature shutdown.

Available in a 16-pin small outline package (SOP), the FAN6920MR is ideal for AIO computers, AC/DC netbook adapters (Slim Pack), open-frame SMPS and battery chargers, as well as LCD TV and LED street lights.

Fairchild enables engineers to drive innovation in their designs by developing solutions like the FAN6920MR, which is part of a family of integrated critical mode PFC and quasi-resonant current mode PWM controllers. These devices integrate functionality, increase performance and provide full protection while lowering component counts, simplifying design and reducing bill of material costs.

Price: US $00.82 in 1,000 quantity pieces

Availability: Samples available now

Delivery: 8-10 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.

http://www.fairchildsemi.com/ds/FA/FAN6920MR.pdf

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Editorial Contacts:

Fairchild Semiconductor:
Paul R. Hughes
Product PR Manager
1-(800) 341-0392 X 3110
Email: paul.hughes@fairchildsemi.com

Agency:
Sarah Thomas
Topaz Partners
1-(781)-404-2427
Email: fairchild@topazpartners.com

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.