Fairchild Semiconductor’s Linear LED Drivers Conserve Space in Portable Backlighting Applications
August 04 2010 - 11:01AM
Business Wire
Space-constrained applications, such as handsets, glucometers
and other portable devices that require illumination of LCD
displays and keypads, now have a linear LED driver option that can
save up to 60 percent board space compared to alternate solutions.
The design of Fairchild Semiconductor’s (NYSE: FCS) FAN5622/24/26
reduces overall component count by eliminating additional passive
components used in charge pumps and series boost LED drivers.
Fairchild’s linear LED drivers simplify design with an easy-to-use
control interface and a minimal amount of components.
The FAN5622/24/26 are two-, four-, and six-channel current-sink
linear LED drivers, ideal for backlighting the main LCD displays or
keypads in mobile electronics.
With a very low dropout voltage of 50mV, the FAN5622/24/26
facilitates driving LEDs without an inductor or flyback capacitors.
The brightness levels of the LED outputs are programmed through a
single-wire control interface. The user can program 32 linear
dimming steps and turn on and off the LEDs through this interface
by applying digital pulses. This allows for greater dimming
resolution using a simple methodology to control this
functionality. These LED drivers also have a high peak efficiency
(92 percent) thus extending battery life in portable
applications.
For design and component engineers, Fairchild’s LED drivers are
cost-effective and offer a simplistic-design, minimizing the
overall solution space compared to a charge pump solution or an
inductive boost solution. The FAN5622/24/26 reduces the overall
bill of materials (BOM) and accelerates time-to-market for portable
designs that do not require a complex lighting solution.
Additional features include a wide input voltage range (2.7 to
5.5V), short-circuit, under-voltage and thermal protection and less
than 1µA shut-down current. The FAN5624, available in micro-MLP
packaging (1.4 x 1.8mm), is nearly 60 percent smaller than
competing solutions, while the FAN5626, packaged in the 1.6 x 2.1mm
MicroPAK™ MLP, is nearly 20 percent smaller.
The FAN5622/24/26 are part of Fairchild’s industry-leading,
comprehensive portfolio of LED drivers that improve efficiency to
meet stringent energy efficiency standards, reduce component count
and simplify designs in today’s portable electronic device.
Price (each, 1k pcs.):
FAN5622 = $0.47 FAN5624 = $0.55 FAN5626 = $0.63
Availability: Samples available now
Delivery: 6-8 weeks
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/FA/FAN5622.pdf
http://www.fairchildsemi.com/ds/FA/FAN5624.pdf
http://www.fairchildsemi.com/ds/FA/FAN5626.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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