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National Semiconductor Introduces Magnetic Boost Regulator with Programmable Oscillator Frequency

Aug 3, 2005

August 3, 2005 - National Semiconductor Corporation (NYSE:NSM) today introduced an inductive-boost series white LED driver that features programmable oscillator frequency.  With a 2.3V to 7V input voltage range, the LM2707 is ideal for display backlighting and other general-purpose lighting applications that use single-cell Lithium-Ion batteries.

When stacking the LEDs in series between the output and the low-voltage feedback pin, the LM2707 provides tightly regulated LED currents, exceptional LED brightness uniformity and very high LED-drive power efficiency of greater than 80 percent.

Key features for the LM2707 include:

  • Excellent LED Drive Capability: 3 LEDs @ 30 mA; 4 LEDs @ 20 mA; 6 LEDs (2 strings of 3) @ 15 mA  
  • Very High LED Drive Efficiency: > 80%  
  • High-Speed PWM Brightness Control Capability  
  • Over-Voltage Protection (18V min, 19V typ, 20V max)  
  • Inrush and Inductor Current Limiting  
  • 2.3V - 7V Input Voltage Range  
  • No External Compensation Needed  
  • Programmable Oscillator Frequency

For more information on the LM2707 or to order samples, visit http://www.national.com/pf/LM/LM2707.html.

Packaging, Pricing and Availability
National’s LM2707 is available now in a SOT23-8 package and costs 76 cents in quantities of 1,000.  For more information on National’s white LED driver products, visit power.national.com.

About National Semiconductor
National Semiconductor, the industry's premier analog company, creates high-value analog devices and subsystems.  National's leading-edge products include power management circuits, display drivers, audio and operational amplifiers, communication interface products and data conversion solutions. National's key analog markets include wireless handsets, displays and a variety of broad electronics markets, including medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, California, National reported sales of $1.91 billion for fiscal 2005, which ended May 29, 2005.  Additional company and product information is available at www.national.com