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most common source of failures in
SMPS-based products.
To sum up the FL77944 value
proposition: It is the simplest,
most cost effective lighting solution
currently on the market. It provides
best-in-class light quality that meets
high PF and low THD require-ments,
along with various dimming principles.
It is suited for indoor and outdoor
applications, including down light,
tube light, high bay, flood light and
street light systems.
Evaluation Board Now
Available
At the recent PCIM Europe trade fair
(10 - 12 May 2016 in Nuremberg,
Germany) Fairchild also demonstrated
the FEBFL77944 evaluation board for
systems designers. Visit Fairchild’s LED
Direct AC Drive blog, lighting solutions
guide and Direct AC Drive website
for detailed product information,
datasheets and evaluation boards.
Author
John Wiggenhorn is General Manager,
Offline Power Business Unit, at
Fairchild Semiconductor.
Figure 4. LED Board based on the LF77944.
Figure 5. Minimum component count (excluding LEDs) 23 vs 62…one board vs two and the SMPS’ second board
is two-sided board
compact lighting designs.
•
Tunable Flicker reduction.
With the addition of external energy
storage capacitors, the flicker index
can be tuned to application acceptable
levels while meeting PF > 0.9 and
THD < 20%.
•
Improved reliability and
lifetime. LED products based on the
FL77944 should be more reliable
and last significantly longer than
SMPS-based products as there are
fewer points of failure. Eliminating
electrolytic capacitors removes the
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