Fairchild Semiconductor’s LED Driver Compatible with Traditional TRIAC Dimming, Analog Dimming and Non-Dimming Lamp Designs
February 06 2012 - 11:29AM
Business Wire
LED lighting has evolved into a promising solution for replacing
conventional lighting sources, such as fluorescent and incandescent
lights. However, designers face several obstacles in residential
and commercial LED lighting applications up to 20W including bulb,
down lighting (GU10/E17, E26/27, PAR30/38) and Tube/Bar.
Implementing dimming capabilities in a conventional TRIAC dimmer
infrastructure is challenging because of dimmer compatibility.
Additionally, small space requirements remain a consideration.
FL7730 (Dimmable) and FL7732
(Non-Dimmable) (Graphic: Business Wire)
To help designers address these challenges, Fairchild
Semiconductor (NYSE:FCS) developed the FL7730 single-stage primary
side regulation (PSR) controller with power factor correction
(PFC), TRIAC and analog dimming compatibility, as well as the
FL7732 for non-dimming applications.
The FL7730 is an active PFC controller for single-stage flyback
topology application. The device supports both TRIAC and analog
dimming. Implemented with Fairchild’s unique analog sensing
technology, the device can achieve TRIAC dimming control without
flicker over the full range of 0 to 100% light output.
The FL7730 and FL7732 combine primary-side regulation and a
single-stage PFC topology to minimize total bill-of-material (BOM)
count, such as an input electrolytic capacitor and feedback
circuitry, therefore allowing for a more compact, longer life, and
lower system cost design.
To improve power factor and THD, both devices feature constant
on-time control with an internal error amplifier and low bandwidth
compensator. Precise Constant Current accuracy/control (± 5
percent) regulates accurate output current, independent of input
and output voltage, allowing designers to achieve high and improved
lighting quality. Operating frequency is proportionally adjusted by
output voltage in both devices to guarantee DCM operation with
optimized PF/THD and simpler design.
Excellent PF (≥0.9), low total harmonic distortion (THD) (Class
C) and power efficiency of up to 85 percent for the FL7730 –
greater than 85 percent for the FL7732 in non-dimming applications
– allows these devices to meet worldwide energy saving
regulations.
Fairchild offers a total solution portfolio for low- (50W) LED
driver applications. Our highly integrated PWM and PFC controller
solutions reduce component BOM counts to enable smaller lamp sizes
and eliminate design complexities, while improving overall lighting
efficiency. Fairchild’s extensive product portfolio ranges from
discrete devices to integrated solutions that contain PFC
controllers, high voltage gate drivers and MOSFETs. With a
commitment to energy savings and meeting the most stringent
regulations, Fairchild has developed innovative products that
maximize performance while reducing board space, design complexity
and system costs. In addition, Fairchild’s Global Power ResourceSM
Center comprised of online tools, FAEs and regional centers staffed
by power engineers, is the industry standard for customer design
support.
Fairchild Semiconductor: Solutions for Your Success™
Price: US $ in 1,000 quantity pieces
FL7730: $1.27
FL7732: $1.15
Availability: Samples available upon request.
Delivery: 8-12 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, please go
to:
http://www.fairchildsemi.com/ds/FL/FL7730.pdf
http://www.fairchildsemi.com/ds/FL/FL7732.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
http://www.fairchildsemi.com.
Follow us on Twitter @ http://twitter.com/FairchildSemi
View product and company videos, listen to podcasts and comment
on our blog @
http://www.fairchildsemi.com/engineeringconnections
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