Functionality in 40-Inch-and-Larger Displays
Microsemi Corporation (Nasdaq:MSCC), a leading manufacturer of high performance analog/mixed signal integrated circuits and high reliability semiconductors, today released two cold cathode fluorescent lamp (CCFL) inverter controller products that significantly improve display quality and performance, both for 26 to 37-inch LCD TVs and the latest generation TVs in 40-inch-and-larger display sizes which utilize High Voltage LCD Integrated Power Supply (HV-LIPS) topologies.
Microsemi's new CCFL inverter controllers include the LX6523, which is the first to embed high-performance features including soft start, fault indication and flexible configuration support for push-pull, full bridge, or half-bridge drive in an ultra-low-cost 14-pin package for 26- to 37-inch displays. The LX6503 with SYNC functionality is targeted at 40-inch-and-larger HV-LIPS TVs that integrate both the power supply and backlight inverter.
The LX6503 and LX6523 provide the key functions needed for LCD TV / Monitor displays in a simplified controller while providing reliable lamp striking, comprehensive brightness control modes and support for 24V inverter topologies in existing backlight applications. The SYNC capability significantly improves display quality by synchronizing both the frequency and phase of the lamp current between inverters or to external signals from a wide variety of sources including DVD and Blu-Ray devices. Both the LX6503 and LX6523 controllers also feature tighter lamp current accuracy as compared to competitive solutions.
"Microsemi continues to innovate in the CCFL controller space while delivering high-end features and capabilities down to lower price points, across all market tiers," said Tom Kapucija, director of marketing with Microsemi's Analog Mixed Signal Group. "The LX6503 and LX6523 each set a new price/performance standard both in small LCD TVs as well as the latest HV-LIPS models. They are the first of many key products we will be launching during 2009, spanning a broad array of backlighting, sensor and color management system solutions that drive both conventional and emerging high-efficiency LED backlight solutions in a wide variety of TV, notebook computer, automotive and other display platforms and applications."
Key LX6503 and LX6523 Features:
- Flexible and easy to use
- Supports Push-Pull, Half-Bridge or Full-Bridge inverter
- Inverter SYNC functionality (LX6503)
- PWM or analog based burst dimming
- Offers a wide range of supply operation from 6V to 27V
- Features a 600mA source/sink drive and on-chip regulator with
UVLO protection
- Configurable and robust operation
- Reliable operation is supported via programmable Strike Time,
- User Settable Burst Dimming Frequency and Fault Time
- Multiple fault detection capabilities including open lamp,
- -40 degrees C to +85 degrees C operating temperature range
Pricing and Availability
The LX6503 is production released and is priced at less than $0.60 in OEM quantities. The LX6523 is sampling now and is priced at less than $0.40 in OEM quantities. The LX6503 is offered in a 16 lead, wide body SOIC, while the LX6523 is available in a 14 lead, narrow body SOIC. Data sheets are available on the Microsemi website: http://www.microsemi.com. Application notes and evaluation kit information are available from local Microsemi sales representatives: http://www.microsemi.com/contact/contactfind.asp.
Attachments:
Figure 1: LX6503_LX6523 device image
http://www.microsemi.com/PRImages/LX6503_23_Photo.jpg
Figure 2: LX6503 typical application circuit
http://www.microsemi.com/PRImages/LX6503_Block_Diagram.pdf
Figure 3: LX6523 typical application circuit
http://www.microsemi.com/PRImages/LX6523_Block_Diagram.pdf
About Microsemi
Microsemi Corporation, with corporate headquarters in Irvine, California, is a leading designer, manufacturer and marketer of high performance analog and mixed-signal integrated circuits and high reliability semiconductors. The company's semiconductors manage and control or regulate power, protect against transient voltage spikes and transmit, receive and amplify signals.
Microsemi's products include individual components as well as integrated circuit solutions that enhance customer designs by improving performance and reliability, battery optimization, reducing size or protecting circuits. The principal markets the company serves include implanted medical, defense/aerospace and satellite, notebook computers, monitors and LCD TVs, automotive and mobile connectivity applications. More information may be obtained by contacting the company directly or by visiting its website at http://www.microsemi.com.
The Microsemi Corporation logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=1233
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