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CCFL controllers ensure increased dynamic contrast

Posted: 10 Mar 2010 ?? ?Print Version ?Bookmark and Share

Keywords:backlight controller? CCFL? LCD? inverter?

LX6502 controller

Microsemi Corp. is offering a new cathode fluorescent light (CCFL) controller featuring mega-contrast dimming for 24V CCFL inverter applications in small- to large-sized LCD displays.

The LX6502 full-bridge controller integrates 12V gate drivers with 800mA source/1000mA sink drive. It employs its patented third-generation PureBLACK mega-contrast dimming technology, which provides high image quality with improved black levels and increased dynamic contrast.

Microsemi's LX6502 inverter supports 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.

Additional features include inverter SYNC functionality; PWM- or analog-based burst dimming; a wide range of supply operation from 10V to 35V; and a -40C to +85C operating temperature range. The LX6502 is offered in a 28-lead, wide-body SOIC plastic package.

Pricing for the LX6502 is less than $0.64 each in OEM quantities. Production samples are available now; volume production is scheduled to begin in April.

- Ismini Scouras

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