DGAP-News: Dialog Semiconductor Plc.: DIALOG SEMICONDUCTOR 16-CHANNEL LED BACKLIGHT DRIVER ENHANCES TV PICTURE QUALITY WITH PATENTED ANYMODE DIMMING
(firmenpresse) - DGAP-News: Dialog Semiconductor Plc. / Key word(s): Product Launch
Dialog Semiconductor Plc.: DIALOG SEMICONDUCTOR 16-CHANNEL LED
BACKLIGHT DRIVER ENHANCES TV PICTURE QUALITY WITH PATENTED ANYMODE
DIMMING
15.10.2013 / 17:00
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DIALOG SEMICONDUCTOR 16-CHANNEL LED BACKLIGHT DRIVER ENHANCES TV PICTURE
QUALITY WITH PATENTED ANYMODE DIMMING
iW7025 AnyMode dimming enhances contrast ratio, reduces motion blur,
offering industry's most comprehensive short protection
Kirchheim/Teck, Germany, 15 October 2013 - Dialog Semiconductor plc (FWB:
DLG), a provider of highly integrated power management, audio, AC/DC and
short-range wireless technologies, today debuted the iW7025, a 16-channel
LED backlight driver that delivers enhanced picture quality, robust,
patented short protection and lower cost for next-generation 2D and 3D LCD
TVs. Dialog's patented AnyMode(TM) dimming gives TV OEMs the industry's
most comprehensive dimming options to improve picture quality and the most
extensive set of short protection features to prevent circuit failures and
safety issues.
The iW7025 was developed by Dialog's Power Conversion Business Group
(formerly iWatt Inc.) and extends Dialog's addressable market into the LCD
TV backlighting power management space.
A key challenge for LED TV designers is how to easily reduce motion blur
and deliver a high contrast ratio. With conventional LED drivers this
requires complex calculations and algorithms to configure the LED current
phases to optimally synchronize the LCD panel backlight to the video frame
refresh rate. The iW7025's AnyMode dimming solves this issue by providing
comprehensive, simple and flexible dimming options that improve LED TV
picture quality and reduce design complexity. These dimming modes include
high frequency pulse width modulation (PWM) up to 4kHz, scanning-mode PWM,
configurable phase-shift, 8-bit analog, 13-bit local and hybrid dimming.
AnyMode dimming enables continuous PWM signals or burst PWM signals that
are fully synchronized to the video frame at the same or higher frequency.
The PWM duty cycle can be updated in each video frame and with
user-configurable tail or head delays. This gives designers more options to
reduce motion blur and improve the contrast ratio. A built-in phase-locked
loop (PLL) further ensures jitter-free operation even with a noisy VSYNC
signal.
The iW7025 also helps TV OEMs address safety and reliability issues by
incorporating the most robust short detection and protection features.
These include individual LED short, channel-to-channel short, current sink
MOSFET drain-to-source short, bipolar junction transistor (BJT)
collector-to-emitter short, current sense resistor short, and chip-to-chip
string short protection across multiple LED drivers. LED open-fault
detection and over-temperature protection are also included.
The rich features of the iW7025 make it an ideal choice for edge-lit and
direct-lit LED LCD TV designs. The iW7025 uses external LED current sinks
and up to two external DC converters (boost, buck, LLC, etc.) for the LED
driver to enable easy current and voltage scaling (600mA or more per
channel and Vout to 85V maximum). This allows designers to source one part
type to meet requirements spanning medium- to large-size LCD TVs and
monitors.
The iW7025 reduces the bill of materials (BOM) cost in a number of ways.
The digital control engine generates the PWM wave form and manages all
fault conditions, eliminating the need for expensive microcontrollers. In
addition to external MOSFETs, the iW7025 supports lower cost BJTs for
further BOM cost savings. The 85V drain sensing capability removes the need
for external diodes usually required for LED short-circuit fault
management, as well as cascodes or zener clamps typically required for
protection. A wide, 10V to 28V input supply voltage range makes the iW7025
compatible with existing TV power systems, eliminating the need for a
separate voltage rail.
The PWM dimming range of the iW7025 is 0% to 100%, with 13-bit resolution.
Precise control of the PWM output position and the PWM duty cycle offer the
flexibility to support both patterned retarder (PR) and shutter glass (SG)
3D technologies, while hybrid dimming lets users mix PWM and analog dimming
modes to maximize system efficiency. Phase-shift dimming allows the use of
smaller output capacitors, eliminating audible noise, improving
electromagnetic interference (EMI), and lowering cost.
The iW7025 provides high,±2% channel-to-channel matching accuracy and±0.5% absolute current accuracy to deliver uniform brightness across the
entire display. It comes in two package options: a 64-pin, 10mm x 10mm,
thin QFP with 0.5mm pitch and a 64-pin, 14mm x 14mm, thin QFP with 0.8mm
pitch, both with pin-outs optimised for single-layer PCB layout.
iW7025 Key Features
- 16-channel LED driver controller, 85V (max) LED voltage per channel
- AnyMode comprehensive dimming control for higher picture quality
- Robust short protection: individual LED short, channel-to-channel
short, current sink MOSFET drain-to-source short, BJT
collector-to-emitter short, current sense resistor short, chip-to-chip
string short
- External LED current sink MOSFETs/BJTs for maximum flexibility and
lower BOM cost
- Wide input voltage: 10V to 28V
- Scalable LED current
- Supports both 2D and 3D LCD TV modes
- Digitally controlled scanning mode
- PWM dimming range: 0% to 100%
- SPI daisy-chain interface simplifies design when supporting more than
16 LED strings
Pricing, Availability
The iW7025 is available now in production quantities and is priced at US
$1.54 each in 1000-piece quantities, for either the 64-pin 10mm x 10mm TQFP
or 64-pin 14mm x 14mm TQFP package. Product brief is available: iW7025
Product Brief.?ENDS?AnyMode dimming is a trademark of iWatt Inc., an affiliated company of
Dialog Semiconductor plc. All other trademarks and registered trademarks
are the property of their respective owners.
Note to Editors:
Downloadable product photos:
High Resolution:
http://iwatt.com/wp-content/uploads/2013/10/7025-iWatt-300dpi.jpg
Low Resolution:
http://iwatt.com/wp-content/uploads/2013/10/7025-iWatt-130dpi.jpg
Company Contacts:
Lauren Ofstedahl
Dialog Semiconductor
Phone: +1 (408) 845-8518
lauren.ofstedahl(at)diasemi.com
Twitter: (at)DialogSemi
Sherry Hill
Dialog Semiconductor
Power Conversion Business Group
Phone: +1 (408) 628-6521
sherry.hill(at)diasemi.com
Media Contact:
Racepoint Group
Lauren Ginsberg
Phone: +1 (617) 624-3254
lginsberg(at)racepointgroup.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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234028 15.10.2013
Themen in dieser Pressemitteilung:
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channel-led-backlight-driver-enhances-tv-picture-quality-with-patented-anymode-dimming
Unternehmensinformation / Kurzprofil:
Datum: 15.10.2013 - 17:00 Uhr
Sprache: Deutsch
News-ID 305930
Anzahl Zeichen: 8330
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