CCFL Controller IC increases LCD backlighting control.

Press Release Summary:

Supplied in 28-lead, plastic SOIC, LX6502(TM) brings PureBLACK(TM) mega-contrast dimming to 24 V CCFL inverter applications in small- to large-sized LCDs. IC offers mega-contrast dimming and fully integrated on-chip 12 V gate drivers to support full-bridge, high- and low-side N-channel power MOSFET configurations with input voltages to 35 V. In addition to protection functions, product integrates voltage regulator and offers user-configurable feature set.

Original Press Release:

Microsemi Expands Backlight Controller Family Featuring Third-Generation PureBLACK(TM) Mega-Contrast Dimming Technology Now Available for 24-Volt CCFL Inverter Solutions in LCD Panel Designs

Now Available for 24-Volt CCFL Inverter Solutions in LCD Panel Designs

IRVINE, Calif. -- Microsemi Corporation (Nasdaq:MSCC), a leading manufacturer of high performance analog/mixed signal integrated circuits and high reliability semiconductors, today introduced a new CCFL controller featuring mega-contrast dimming for 24-volt cold cathode fluorescent light (CCFL) inverter applications in small- to large-sized LCD displays.

A leader in large-screen LCD TV innovations for more than a decade, Microsemi has expanded its CCFL portfolio to include the LX6502(TM) full-bridge controller with integrated 12V gate drivers and patented third-generation PureBLACKTM technology. The backlight controller's PureBLACK technology sets new standards for black levels, dynamic contrast, image uniformity, reliability and protection, and reduces overall bill of material (BOM) costs.

"Microsemi now offers a full suite of PureBLACKdevices for any display application, whether HV-LIPS or traditional 24V inverter architectures," said Tom Kapucija, director of marketing with Microsemi's Analog Mixed Signal Group. "Following the successful adoption of our LX6503A(TM) and LX6523A(TM) PureBLACK devices in HV-LIPS solutions by top TV manufacturers, we are now excited to add this new device to our CCFL inverter controller family. The LX6502 gives LCD panel manufacturers and other OEMs yet another option for using our mega-contrast dimming technology to deliver high-end image quality with superior black levels and increased dynamic contrast."

Microsemi's LX6502 inverter brings advanced mega-contrast dimming to large-screen displays with fully integrated on-chip 12V gate drivers to support full-bridge, high- and low-side N-channel power MOSFET configurations with input voltages to 35V. An integrated on-chip voltage regulator with under-voltage lockout protection further minimizes the overall system BOM costs. Additional BOM cost reductions are enabled by a fully integrated suite of protection functions that include soft-start, direct duty cycle control with maximum duty limiting, and over-current and over-voltage protection.

The LX6502 enables quick design turns with its flexible and user-configurable feature set. Programmable lamp-frequency operation is further enhanced with high-accuracy, user-programmable burst-dimming and strike-frequency control, as well as programmable strike and open-lamp protection. Also included is a synchronization (SYNC) function with selectable frequency ratio, frequency limit, auto detect, and synchronization. This helps to improve image quality by eliminating inverter interference effects on the video signals.

The LX6502 controller integrates all necessary functionality for LCD TV or monitor displays in a single controller that also provides reliable lamp striking, comprehensive brightness control modes (including analog and pulse-width modulation burst dimming) and support for 24V inverter topologies in existing backlight applications. The LX6502 controller features tighter lamp current accuracy as compared to competitive solutions.

Key LX6502 Features:
-- Superior black level and dynamic contrast performance with built-in protection

-- Integrated PureBLACK mega-contrast dimming technology

-- Support for over-voltage, over-current and open-lamp protection

-- Flexible and easy to use

-- Support for full-bridge inverter configurations driving high- and low-side N-channel power MOSFETS

-- Integrated 12V full bridge gate drivers with 800mA source/ 1000mA sink drive

-- Power-on-reset and on-chip regulator with under-voltage lockout protection

-- Inverter SYNC functionality

-- PWM or analog-based burst dimming

-- Wide range of supply operation from 10V to 35V

-- Configurable and robust operation

-- Reliable operation supported via programmable strike time and strike frequency

-- User-configurable burst dimming frequency and fault time

-- -40°C to +85°C operating temperature range

Pricing and Availability
LX6502 production samples are available now, and volume production is scheduled to begin in April 2010. Pricing is less than $0.64 each in OEM quantities. The LX6502 is offered in a 28-lead, wide-body small outline (SOIC) plastic package. Data sheets are available on the Microsemi website: Application notes and evaluation kit information are available from Microsemi sales representatives:

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, high reliability semiconductors and RF subsystems. 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

The Microsemi Corporation logo is available at

CONTACT: Microsemi Corporation
John Hohener, Vice President and CFO
(949) 221-7100
(949) 221-7100

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