DGAP-News: Dialog Semiconductor Plc.: DIALOG SEMICONDUCTOR EXPANDS AC/DC PRODUCT PORTFOLIO TO INCLUDE SYNCHRONOUS RECTIFIERS (news with additional features)


DGAP-News: Dialog Semiconductor Plc. / Key word(s):
Miscellaneous/Miscellaneous
Dialog Semiconductor Plc.: DIALOG SEMICONDUCTOR EXPANDS AC/DC PRODUCT
PORTFOLIO TO INCLUDE SYNCHRONOUS RECTIFIERS (news with additional
features)

23.09.2014 / 08:00

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iW671 synchronous rectifier - replacing Schottky diodes, enabling higher
power, smaller form factor smartphone and tablet power adapters

London UK, 23 September 2014 - Dialog Semiconductor plc (FWB: DLG), a
provider of highly integrated power management, AC/DC, solid state lighting
and Bluetooth(R) Smart wireless technology, today launched its iW671
synchronous rectifier designed to enable small, higher power adapters for
mobile devices. The iW671 replaces the secondary-side Schottky diode used
in conventional power supplies with a more efficient MOSFET and works with
Dialog's iW1786 or iW1787 primary-side controllers to deliver efficiency
greater than 88%. This enables the higher power density needed for more
powerful, small form-factor adapters without exceeding thermal limits.

Conventional power supplies use Schottky diodes to rectify the output
voltage (change the AC voltage to a DC voltage). When replacing the
Schottky diode with a synchronous rectifier, the voltage dropped across the
switching MOSFET is less than the forward voltage of the Schottky diode,
thereby reducing power loss. However, conventional synchronous rectifiers
still require a Schottky diode to be used in parallel as they need to turn
off when approaching the zero crossing to eliminate the risk of
shoot-through, which can overheat and potentially destroy the power supply.
The iW671 uses Dialog's proprietary digital control technology to eliminate
the need for the parallel Schottky diode. Synchronous rectification also
leads to an efficiency improvement of approximately 4% at 5V, resulting in
the high >88% full-load efficiency for higher power operation in a small
form-factor without overheating the power supply.

The iW671 is designed to work for 15W or 50W output power, ultra-low
no-load standby power consumption of < 15mW (iW1786) and < 30mW (iW1787)
and
high efficiency, enabling chargers and adapters to meet stringent global
energy standards including the final 2014 U.S. DOE(1) and European CoC
version 5, tier 2(2) regulations.

Power supplies for electronic products continue to consume power when
plugged in but not in use. To achieve low standby power, these power
supplies typically enter a low standby operating mode. However, when a load
is applied, they need to "wake up" quickly to keep the output voltage from
dropping too low. Dynamic load response (DLR) is determined by the speed at
which the system wakes up and responds to changes in the power load.
Typical adapter and charger design approaches achieve low standby power and
high efficiency at the expense of slow wake up (i.e. slow DLR performance).
The iW671 enables ultra-fast DLR for quicker recovery from low-power
standby mode by integrating an adaptive voltage position monitor that
detects the flyback converter output voltage undershoot.

"With global energy regulations for power consumption becoming more and
more stringent, power supplies are being pushed to their cost, performance
and size limits," said Davin Lee, Senior Vice President and General Manager
of the Power Conversion Business Group at Dialog Semiconductor. "Dialog's
innovative iW671 synchronous rectifier and controller solutions will now
provide designers with the ultimate combination of higher efficiency,
faster standby recovery performance and a reduced BOM for a new generation
of low cost adapters and chargers."

Key Features

  - iW1786+iW671: up to 15W output power, < 15mW no-load standby power
    consumption

  - iW1787+iW671: up to 50W output power, < 30mW no-load standby power
    consumption

  - Eliminates parallel Schottky diode 

  - Higher efficiency >88% (full load)

  - Fast dynamic load response

  - Complies with US DOE(1) and EU CoC V5, Tier 2(2) requirements for
    external power supply efficiency

Product summaries are available: iW671 Product Summary, iW1786 Product
Summary, iW1787 Product Summary

‒ ENDS ‒

(1) US Department of Energy (DOE), Energy Conservation Program: Energy
Conservation Standards for External Power Supplies, Final Rule, 10 CFR Part
430, ID: EERE-2008-BT-STD-0005-0219, February 10, 2014,

(2) European Commission, Directorate-General Joint Research Centre,
Institute for Energy and Transport, Renewable Energy Unit, "External Power
Supplies Code of Conduct - Version 5," October 29, 2013,

Company Contact:
Lauren Ofstedahl
Dialog Semiconductor
Phone:  +1 (408) 845-8518
lauren.ofstedahl@diasemi.com
Web: www.dialog-semiconductor.com
Twitter: @DialogSemi

Sherry Hill
Dialog Semiconductor 
Power Conversion Business Group
Phone: +1 (408) 628-6521
sherry.hill@diasemi.com                       

Media Contact:
Sophie Waterfield
Racepoint Global
Phone: +44 (0)208 811 2125
sophie.waterfield@racepointglobal.com 

About Dialog Semiconductor
Dialog Semiconductor creates highly integrated, mixed-signal integrated
circuits (ICs), optimised for personal portable, short-range wireless
connectivity, 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 consumer
applications, including smartphones, tablets, Ultrabooks(TM) and emerging
wearable type devices.
Dialog's power management ICs increase the performance of portable devices
by extending battery lifetime, enabling faster charging and enhancing the
consumer's experience. With world-class manufacturing partners, Dialog
operates a fabless business model.

Dialog Semiconductor plc is headquartered in London with a global sales,
R&D and marketing organisation. In 2013, it had approximately $910 million
in revenue and was one of the fastest growing European public semiconductor
companies. It currently has approximately 1,100 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).



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Additional features:

Picture:
http://newsfeed2.equitystory.com/dialog-semiconductor/288115.html
Subtitle: iW671 SYNCHRONOUS RECTIFIER

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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@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                                             
 
 
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