Fairchild Semiconductor Offers Designers a Total Solution Portfolio for
Low-, Mid- and High-Power LED Lighting Applications
Broad Portfolio Simplifies Supply Chain Complexity; Value-Added Solutions
Achieve High-Efficiency System Performance
SAN JOSE, Calif. - July 11, 2011 - With the increasing popularity of LED
lighting applications, designers face challenges ranging from design
complexity and the need for high system efficiency to limited PCB space and
the management of multiple vendors to meet all of their design requirements.
To address these challenges, Fairchild Semiconductor offers a
broad portfolio of LED lighting solutions for low-, mid- and high-power
Fairchild's solutions feature integrated components in a single IC, using
highly efficient and effective technologies for power ranges that are 1W and
above. Fairchild offers multiple topologies, which provide energy efficient
solutions for low-, mid- and high-power lighting applications. These
topologies provide high power factor and low total harmonic distortion,
enabling extended system life and reduced lifetime cost while meeting global
The high degree of integration provided by these LED lighting solutions meet
designers' critical board-space requirements, simplify design and reduce the
overall bill of material (BOM).
Designers work with lighting applications in areas such as down lights,
L-lights, flat light, street lights, industrial lighting, stage lighting,
wall washing and signage; the broad portfolio of products offered by
Fairchild supports all lighting applications. This offering allows designers
to simplify supply chain complexity by reducing the number of vendors
Leveraging core expertise in lighting and power management, Fairchild's
multiple topologies for LED lighting applications include Primary Side
Regulating (PSR) flyback, single-stage Power Factor Correction (PFC)
flyback, PFC + Quasi-Resonant (QR) flyback and LLC half-bridge solutions.
PSR flyback solutions target LED lighting applications that are <20W: In
these designs, small lamp size is critical and cost pressure is high. To
address this, Fairchild's PSR technology provides TRUECURRENTT technology
and distinct IP for leading-edge CV/CC performance in a multi-chip package
option (7SOP/DIP) with the MOSFET included (1A/700V VDMOS ). A PSR
controller using an external MOSFET is also available. By using PSR flyback
solutions for LED lamps from ~5W to ~20W, designers can achieve high power
efficiency (over 80 percent improvement from current methodologies) and
eliminate the need for secondary feedback circuits, lowering bill of
material costs, simplifying the design and saving PCB space.
Fairchild's single-stage PFC flyback for 20~50W applications: These lighting
applications require high power factor in a limited space, plus higher
efficiency and reliability than traditional solutions provide.
Fairchild provides a CRM PFC PWM controller for single-stage flyback, ideal
for 10~50W LED down lights and 20~50W LED L-lights, that provide high
efficiency by offering high power factor and low THD performance without
adding components thus lowering the BOM count. Additionally, no bulk
capacitor is needed, which further extends the system lifetime.
PFC + QR Flyback Technology for <100W applications: Designers are faced with
standard solutions that result in high BOM counts, high cost and low system
efficiency. To address this, Fairchild provides a QR flyback solution that
provides high system efficiency and high reliability, and with the CRM PFC
front-end resulting in high power factor and low THD. Through integration,
this technology reduces BOM count, provides cost and space savings, thus
allowing designers to achieve a small size application design. The PFC + QR
flyback technology is well suited for applications such as flat lights, LED
street lights, industrial lighting, stage lights, wall washing and signage.
In order to simplify LED luminary design, Fairchild LED solutions reduce
extra parts to save space and provide high reliability, enhance efficiency,
and reduce lifetime cost for end use. Additionally, Fairchild provides the
system expertise and design tools needed to help designers get their LED
IC-based products to market faster.
LLC half-bridge solutions for <400W: These applications routinely have high
BOM counts, high cost and low system efficiency and reliability, as well as
design complexity. To address these application challenges, Fairchild's LLC
half-bridge solution is an integrated solution with three chips in one
package. The solution features internal MOSFETs with fast recovery body
diode (trr=120ns), with the high side gate driver included. The solution
offers up to 300kHz operating frequency and pulse skipping for frequency
limiting under light load conditions. The LLC half-bridge solution provides
high system efficiency, high reliability as well as reducing BOM cost and
simplified design. It is ideal for LED street lighting, industrial lighting,
stage lights, wall washing and signage.