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CCFL inverter family delivers cost saving benefits for dual lamp LCD panels

Microsemi Corporation has introduced its cost optimized family of high performance CCFL backlight inverters for dual lamp LCD panels.

The new inverter family is designed to migrate Microsemi's proven, IP-differentiated backlighting technology developed to meet demanding automotive, LCD TV and notebook applications into a broad range of mid-sized panel designs, by delivering cost-to-feature benefits of outstanding reliability, efficiency and service. The new inverters will enable Microsemi's leading backlighting technology to be used in many 7- to 19-inch panel applications including medical, POS, kiosk, ATM, and lottery terminals. Inverters identified by product numbers LXMG1627 offer Microsemi's patented RangeMax digital dimming technology, while those numbered LXMG1628 provide analog dimming.

In addition to CCFL backlight solutions, Microsemi supports LED backlit panels through its family of LED driver ICs. Both CCFL and LED IC drivers are further enhanced by the company's complementary line of light sensors and color management blocks.

Key features:

  • PanelMatch provides custom lamp current settings and simplifies supply chain management when multiple panels are used (perfect for distributors and integrators)
  • RangeMax digital dimming (LXMG1627) and analog dimming (LXMG1628) versions enhance user experience and extend lamp and battery life
  • Extended operating temperature range from -30 degrees C to +80 degrees C
  • Compact direct drive design
  • Reliable and robust designs with calculated MTBF of 100 years or more
  • RoHS, UL certified components, UL60950 E175910
  • 5V (digital dimming only) and 12V input supply voltage, 4W and 6W maximum power outputs
  • Available with JST BHR-03VS-1, BHSR-02VS-1 output connectors or Equivalent

Benefits:

  • PanelMatch increases the customer supply chain effectiveness since the same Microsemi inverter can be used to drive panels with different lamp current (up to 1 mA step, 3 mA maximum difference).
  • RangeMax digital dimming technology provides smooth, jitter free, wide-range brightness and advanced power management capability and reduces cost of ownership for the end system. This technology is proven to extend the lamp life as measured by light output at the end of the time period compared to the more standard amplitude adjustment method. The life extension depends on the dimming ratio used by the customer. A 100:1 digital dimming ratio can provide an 80 to 90 percent increased light output after 20k hours. Since the lamp is usually the first component needing replacement in a panel, this translates into direct ownership and warranty cost savings.
  • The direct drive design allows for a more compact, smaller and efficient solution compared to other topologies
  • The new dual lamp inverters, designed according to stringent Microsemi design rules and qualification requirements, have a calculated MTBF of approximately 100 years. All are UL certified components per UL60950 file E175910.

The new CCFL inverter modules are supported by Microsemi's eight-week lead time availability for its most popular inverters.

Availability and Pricing

Several inverters in the new family are currently in production. The entire family will be in full production by Q3 2009. Products are priced in quantity between $16 and $22 depending on the version. Datasheets with application notes are available.

Related links:

www.microsemi.com

An LCD panel to Microsemi inverter match table

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