Adaptive LED Current Ripple Suppressor from Diodes Incorporated Enables High Power Factor & Flicker-Free Professional LED Lig...
June 18 2019 - 10:00AM
Business Wire
Diodes Incorporated (Nasdaq: DIOD) today announced the
availability of the AL5822 LED current ripple suppressor, which
provides high levels of ripple suppression while maintaining high
power factor for commercial and industrial lighting
applications.
It is now mandatory to meet regulatory requirements to suppress
low frequency ripple (100Hz to 120Hz) in LED lighting applications
in many markets, enforced through standards such as the California
Energy Commission Title 24. The AL5822 delivers a high level of
ripple current suppression in single-stage, high power LED
installations, even when triac or PWM dimming techniques are being
used to vary the light level. This ensures there is no sign of
flicker or strobing across the entire dimming range, while still
maintaining a high power factor.
The AL5822 has been designed and tested to comply with the Title
24 building code requirement of less than 30% flicker. The results
show that the AL5822 suppresses over 97% of ripple while still
achieving a power factor of greater than 0.9.
By monitoring the current flowing through the LEDs, the AL5822
compensates for ripple by adjusting the drive voltage for the
external MOSFET. This control loop keeps the MOSFET operating in
the saturation region to deliver a constant current.
With support for various pre-stage circuits, the AL5822 can work
with a number of drivers, such as the AL1665 single stage PFC
flyback buck/boost controller, also from Diodes Incorporated. The
integrated features of the AL5822 remove the need for magnetic
discrete components, minimizing the overall bill of materials.
The AL5822 operates over an input voltage range of 24VAC to
305VAC. Safety features include LED short-circuit,
over-temperature, and over-current protection.
The AL5822 is available in the SOT26 package. Further
information is available at www.diodes.com.
About Diodes Incorporated
Diodes Incorporated (Nasdaq: DIOD), a Standard and Poor’s
SmallCap 600 and Russell 3000 Index company, is a leading global
manufacturer and supplier of high-quality application specific
standard products within the broad discrete, logic, analog and
mixed-signal semiconductor markets. Diodes serves the consumer
electronics, computing, communications, industrial, and automotive
markets. Diodes’ products include diodes, rectifiers, transistors,
MOSFETs, protection devices, function-specific arrays, single gate
logic, amplifiers and comparators, Hall-effect and temperature
sensors, power management devices, including LED drivers, AC-DC
converters and controllers, DC-DC switching and linear voltage
regulators, and voltage references along with special function
devices, such as USB power switches, load switches, voltage
supervisors, and motor controllers. Diodes also has timing,
connectivity, switching, and signal integrity solutions for
high-speed signals. Diodes’ corporate headquarters and Americas’
sales office are located in Plano, Texas and Milpitas, California.
Design, marketing, and engineering centers are located in Plano;
Milpitas; Taipei, Taiwan; Taoyuan City, Taiwan; Zhubei City,
Taiwan; Manchester, England; and Neuhaus, Germany. Diodes’ wafer
fabrication facilities are located in Manchester and Greenock, UK,
and Shanghai, China. Diodes has assembly and test facilities
located in Shanghai, Jinan, Chengdu, and Yangzhou, China, as well
as in Hong Kong, Neuhaus and Taipei. Additional engineering, sales,
warehouse, and logistics offices are located in Taipei; Hong Kong;
Manchester; Shanghai; Shenzhen, China; Seongnam-si, South Korea;
and Munich, Germany, with support offices throughout the world.
Recent news releases, annual reports and SEC filings are
available at the Company’s website: http://www.diodes.com. Written
requests may be sent directly to the Company, or they may be
e-mailed to: diodes-fin@diodes.com.
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version on businesswire.com: https://www.businesswire.com/news/home/20190618005053/en/
Company Contact:Diodes IncorporatedEmily YangVP,
Worldwide Sales and MarketingP: 972-987-3900E:
pressinquiries@diodes.com
Investor Relations Contact:Shelton GroupLeanne K.
SieversEVP, Investor RelationsP: 949-224-3874E:
lsievers@sheltongroup.com
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