DGAP-News: DIALOG SEMICONDUCTOR FLICKERLESS(TM) 45W SSL LED DRIVER DELIVERS HIGH
(firmenpresse) - DGAP-News: Dialog Semiconductor Plc. / Key word(s): Product Launch
DIALOG SEMICONDUCTOR FLICKERLESS(TM) 45W SSL LED DRIVER DELIVERS HIGH
12.08.2013 / 07:49
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iW3623 reduces the number of discrete ICs required in an LED driver and
provides near-zero 100-120Hz output ripple to eliminate flicker. Built-in
over-temperature derating ensures predictable operating life
Kirchheim/Teck, Germany, 12 August 2013 - Dialog Semiconductor plc (FWB:
DLG), a provider of highly integrated power management, audio, AC/DC and
short-range wireless technologies, today announced a new solid state
lighting (SSL) LED driver that integrates boost and flyback converters into
a single IC to reduce the bill of material (BOM) costs and simplify the
design, compared to conventional two-stage driver approaches, while
delivering exceptional performance. The new iW3623 was developed by
Dialog's Power Conversion Business Group, formerly iWatt Inc., acquired in
July 2013 and delivering on Dialog's product portfolio diversification
strategy to expand into the digital power management market space.
The iW3623 offers a universal 100VAC to 277VAC input range and output power
up to 45W. It integrates a boost controller for power factor correction
(PFC) and a flyback converter for LED current regulation, while enabling
high PF>0.95 and low total harmonic distortion (THD) of<10%. Dialog's
patented Flickerless(TM) design achieves a near-zero 100 to 120Hz output
ripple and the built-in over-temperature protection (OTP) and derating
enables lighting designers to deliver a predictable, reliable bulb
operating life.
The rich combination of integrated features makes the iW3623 an ideal
solution for a wide range of non-dimmable, commercial SSL downlight, PAR,
T8 and flat panel ceiling lamp applications.
The iW3623 provides additional BOM savings by using Dialog's patented
PrimAccurate(TM) primary-side control technology that eliminates the need
for a secondary-side regulator and optical feedback isolator. It also
allows FETs to be replaced with lower cost bipolar junction transistors
(BJTs). While using BJT switches lowers the total solution cost, achieving
high conversion efficiency can be a challenge. The iW3623 solves this by
using quasi-resonant mode switching for both the boost and flyback stages
and dynamic base current to optimise conversion efficiency and minimise
EMI. Additionally, Dialog's EZ-EMI(R) technology simplifies EMI filtering
to further minimise the external component count.
Most power ICs are designed with a thermal shutdown feature, which simply
shuts the IC down in high temperature environments. This protects the IC,
but not the LED driver circuit. The iW3623 includes a robust, built-in
over-temperature protection and derating function that actually monitors
the temperature inside the sealed SSL bulb. The OTP feature is configured
via an NTC resistor. When thermal conditions in the bulb reach the set
temperature, the iW3623 automatically and incrementally reduces the current
drive to the LEDs. This lowers the power dissipation, results in cooler
operation, and ensures the temperature rating of the electrolytic
capacitors in the system is not exceeded. Derating allows the capacitors to
operate within the maximum lifetime of the SSL bulb and results in a
predictable bulb operating life. The derating of the current drive results
in negligible light reduction, so users will likely not experience any
visible changes in light output. In extreme temperature situations, the
iW3623 will shut down the current drive to the LEDs to prevent safety and
fire risks.
Additional, iW3623 safety features include LED open/short circuit, single
fault, over-current, current sense resistor short-circuit, input
over-voltage, brown-out and AC line over-voltage/frequency protections.
During output over-voltage conditions, the iW3623 goes into an extended
discharge mode, while maintaining a quick recovery, allowing support for
hot-plug LED modules without causing dangerously high output voltages.
iW3623 Key Features
- Output power: 3W to 45W
- Universal input range: 100-277VAC
- High power factor (PF)>0.95
- Low total harmonic distortion (THD)<10%
- Flickerless technology eliminates LED flicker with<5% 100-120Hz
output
current ripple
- Integrated boost and flyback converters, PrimAccurate primary-side
control: reduce solution size, lower BOM cost, increase reliability
- NTC-based LED over-temperature protection (OTP) and derating
- Meets global standards, including European Union IEC61000-3-2(1)
requirement
- Compatible with Zhaga(2) hot-plug LED module for LED light
interchangeability
Packaging, Pricing, Availability
The iW3623 is available now in production quantities. It comes in a
standard, 14-lead SOIC package and is priced at US $0.93 each in 1000-piece
quantities. Product brief is available: iW3623 Product Brief.?ENDS?PrimAccurate, Flickerless and EZ-EMI are registered trademarks of iWatt
Inc., an affiliated company of Dialog Semiconductor plc. All other
trademarks and registered trademarks are the property of their respective
owners.
(1) European Power Supply Manufacturers Association standard - IEC
61000-3-2: http://www.epsma.org/
(2) The Zhaga Consortium: http://www.zhagastandard.org/
Note to Editors:
Downloadable product photos:
High Resolution:
http://iwatt.com/wp-content/uploads/2013/08/3623-iWatt-300dpi.jpg
Low Resolution:
http://iwatt.com/wp-content/uploads/2013/08/3623-iWatt-130dpi.jpg
Company Contacts:
Helen McInnes
Dialog Semiconductor
Corporate Communications
Tel: +44(0)1793 756 960
Mobile: +44 (0)7554 419 180
E-mail: helen.mcinnes(at)diasemi.com
Twitter: (at)DialogSemi
Web: www.dialog-semiconductor.com
Sherry Hill
Dialog Semiconductor
Power Conversion Business Group
+1 (408) 628-6521
sherry.hill(at)diasemi.com
Media Contacts:
Racepoint Group
DiaSemi(at)racepointgroup.com
Moody&Associates
+1 (214) 363-3460
michelle(at)moodypr.com
About Dialog Semiconductor
Dialog Semiconductor creates highly integrated, mixed-signal integrated
circuits (ICs), optimised for personal portable, low energy short-range
wireless, LED solid state lighting and automotive applications. The company
provides flexible and dynamic support, world-class innovation and the
assurance of dealing with an established business partner.
With its focus and expertise in energy-efficient system power management
and a technology portfolio that also includes audio, short-range wireless,
AC/DC power conversion and multi-touch, Dialog brings decades of experience
to the rapid development of ICs for personal portable and digital consumers
applications, including smartphones, tablets, Ultrabooks(TM) and digital
cordless phones.
Dialog's power management processor companion chips increase the
performance of portable devices by extending battery lifetime, enabling
faster charging and enhancing the consumer's multimedia experience. With
world-class manufacturing partners, Dialog operates a fabless business
model.
Dialog Semiconductor plc is headquartered near Stuttgart with a global
sales, R&D and marketing organisation. In 2012, it had $774 million in
revenue and was one of the fastest growing European public semiconductor
companies. It currently has approximately 1,000 employees worldwide. The
company is listed on the Frankfurt (FWB: DLG) stock exchange (Regulated
Market, Prime Standard, ISIN GB0059822006) and is a member of the German
TecDax index. It also has convertible bonds listed on the Euro MTF Market
on the Luxemburg Stock Exchange (ISIN XS0757015606).
End of Corporate News
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Language: English
Company: Dialog Semiconductor Plc.
Tower Bridge House, St. Katharine's Way
E1W 1AA London
United Kingdom
Phone: +49 7021 805-412
Fax: +49 7021 805-200
E-mail: jose.cano(at)diasemi.com
Internet: www.diasemi.com
ISIN: GB0059822006, XS0757015606
WKN: 927200
Indices: TecDAX
Listed: Regulierter Markt in Frankfurt (Prime Standard);
Freiverkehr in Berlin, Düsseldorf, Hamburg, München,
Stuttgart
End of News DGAP News-Service
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