Fairchild Semiconductor’s Interleaved Boundary-Mode PFC Controller Delivers Over 96 Percent Efficiency in Green Power Supplies
February 17 2009 - 10:30AM
Business Wire
Fairchild Semiconductor (NYSE: FCS) brings power supply
designers a boundary-conduction mode (BCM) interleaving power
factor correction (PFC) controller that provides over 96 percent
power conversion efficiency for AC-DC power supplies. Applications
include power supplies for digital TVs, desktop and entry-level
server computers, front-end telecom systems and industrial power
systems rated from 100W to 1000W. Historically, the
higher-efficiency and lower-cost BCM PFC converters are limited to
about 300W of maximum power level. Interleaving extends the power
range of BCM control while ripple current cancellation minimizes
high peak currents. By interleaving and keeping two power stages
precisely at 180 degrees out of phase timing under all operating
conditions, the FAN9612 lowers conduction losses. These
energy-conservation benefits are integral in helping customers meet
the latest ENERGY STAR� and Climate Savers Computing Initiative
requirements.
By the interleaving of the power trains, the FAN9612 is also
able to reduce the input filter size and reduce board space by as
much as ten percent compared to alternate solutions. This smaller
system footprint reduces the overall cost of the solution and
simplifies design, without compromising on protection features.
The FAN9612 incorporates the industry�s most comprehensive set
of features including:
- Automatic phase disable to
operate with only one channel under light-load conditions,
minimizing power losses.
- A low start-up and operating
current.
- Valley switching technology,
minimizing losses at MOSFET turn-on.
- Over-current and power-limit
protection for each channel.
- Two-level output over-voltage
protection (OVP).
- Input brownout protection and
line OVP.
- Minimum restart timer frequency
to avoid audible noise.
- Maximum switching frequency
clamp.
- Programmable closed-loop
soft-start, which minimizes output voltage overshoot at
start-up.
- Input voltage feed-forward
function that minimizes output voltage variation versus line
voltage.
Fairchild�s Power Factor Correction (PFC) Controller
Portfolio:
The FAN9612 enhances Fairchild�s large portfolio of PFC
controllers, which includes single-channel boundary-conduction mode
controllers, stand-alone continuous conduction-mode controllers as
well as PFC+PWM combination (combo) controllers. With the industry
adoption of PFC as a means of reducing energy waste at the point of
distribution, the interleaved PFC is becoming a more sophisticated
way of maximizing energy savings in today�s energy-conscious
world.
Price (each, 1000 pcs.): FAN9612MX (16-Lead SOIC)
$1.30
Availability: Samples available upon request
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:
http://www.fairchildsemi.com/ds/FA/FAN9612.pdf
To listen to a PFC podcast:
http://fairchildsemi.com/online_media/audio/2009/PFC_Podcast.mp3
For additional information on this PFC controller or other
Fairchild PFC controllers, please go to:
http://www.fairchildsemi.com/whats_new/pfc.html
About Fairchild Semiconductor:
Fairchild Semiconductor (NYSE: FCS) is a global leader
delivering energy-efficient power analog and power discrete
solutions. Fairchild is The Power Franchise�, providing
leading-edge silicon and packaging technologies, manufacturing
strength and system expertise for consumer, communications,
industrial, portable, computing and automotive systems. An
application-driven, solution-based semiconductor supplier,
Fairchild provides online design tools and design centers worldwide
as part of its comprehensive Global Power ResourceSM. Please
contact us on the web at www.fairchildsemi.com
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