Microsemi Corporation (Microsemi), a US-based manufacturer of high performance analog/mixed signal ICs and high reliability semiconductors, has introduced a new cold cathode fluorescent lamp (CCFL) IC, LX1699. The new device simplifies system integration and decreases the bill of material (BOM) and offers the company's high CCFL driver efficiency performance and increases battery life.
Microsemi is committed to delivering complete backlight management system solutions to support its customers in overcoming the specific challenges of today’s notebook market, stated Irene Signorino, marketing director at Microsemi. With a 20 percent BOM reduction targeting our cost-conscious notebook ODMs, the LX1699 is another example of Microsemi’s long history of innovation and leadership in backlighting applications.
Key features:
Ultra low sleep current (typically 1uA at 20V and 5uA at 26.5V) improves inverter efficiency and extends battery life;
Wide 6.5V to 26.5V input voltage range supports common inverter requirements;
Programmable digital and analog dimming with DC voltage or PWM;
Integrated and programmable feed forward line voltage compensation manages fast and accurate responses to changes in input voltage;
Supports the company’s PN full bridge configuration and direct drive configurations;
The new LX1699 also offers the same, robust feature set of the company’s most popular notebook CCFL ICs, including:
User-programmable lamp operating frequency, burst frequency and minimum dimming to meet common inverter platforms;
Supports critical and necessary Intel display power saving technology (DPST) for system PWM input to adjust brightness as a function of video content;
User-programmable Open Lamp and Load Fault time-outs;
Ability to detects and shut down in response to all common lamp faults to ensure safe operation.
The new LX1699 builds on the company’s fifteen years of backlighting innovations, spanning a patent history that includes many fundamental inventions such as US patents 5,615,093; 5,923,129; 593,121; 6,198,234; 6,307,765; 7,242,147; 7,294,971; and 7,250,731, and also other patents pending. Additionally to improving the company CCFL IC offerings, the new controller can be paired with the company’s high-performance visible light sensors for automatic panel brightness controls that match the human eye spectral response (Best Eye technology). This technology will enable optimal end user experience while enlarging lamp life and battery life of demanding portable notebook applications.