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- #LED DRIVER WITH BRIGHTNESS CONTROL DRIVERS#
- #LED DRIVER WITH BRIGHTNESS CONTROL PORTABLE#
- #LED DRIVER WITH BRIGHTNESS CONTROL SERIES#
#LED DRIVER WITH BRIGHTNESS CONTROL SERIES#
By driving the LEDs in series this device ensures that all the LEDs used in applications such as mobile handsets, digital still cameras, GPS devices, MP3 players and other applications using small LCD displays have equal brightness.
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#LED DRIVER WITH BRIGHTNESS CONTROL PORTABLE#
Headquartered in Santa Clara, Calif., National reported sales of $1.42 billion for fiscal 2010.Fairchild Semiconductor introduced the FAN5341 an LED driver solution that is said to improve brightness and resolution in portable designs, while offering 32 linear dimming steps and driving up to five white LEDs in series. Known for its easy-to-use analogue integrated circuits and world-class supply chain, National’s high-performance analogue products enable its customers’ systems to be more energy efficient. National Semiconductor is a leader in power management technology. Note to editors: To view a high-resolution downloadable photo of this product, visit About National Semiconductor The LM3466 LED driver is offered in an 8-pin ePSOP package and priced at $1.30 each in quantities of 1,000. Samples are available now with production quantities in July. System output power is maintained even for any number of open strings. The LM3466 operates with minimal overhead voltage to maximize electrical efficiency.
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Communication between the LM3466 and constant current power supply is not required, nor is LED voltage binning. Each LM3466 conducts a current up to 1.5A. Linear circuitry wards against any EMI and ensures compliance to the EN 55015 EMC standard or other regional EMC regulatory requirements. The LM3466 includes a fault status output, input under voltage lockout, current limit and thermal shutdown protection. LED strings with maximum stack voltages exceeding 70V may be driven with minor changes to the external components. National’s LM3466 linear LED driver integrates a 70V, 1.5A N-Channel MOSFET and features a wide input range of 6V to 70V.
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Technical Features of National’s LM3466 LED Driver During an open (inactive) string state, each LM3466 automatically equalizes current throughout remaining strings to maintain relatively constant output power. A complete fixture can be constructed by repeating the strings in parallel.Ī unique dynamic current equalizing control scheme enables communication between each LM3466 LED driver to divide current equally or ratiometrically amongst multiple active LED strings. The high level of integration enables a basic design of just one LM3466 along with one resistor and one capacitor to drive a string of LEDs. National’s LM3466 solves these problems by integrating a MOSFET and utilizing a unique control scheme. In addition, maintaining equal currents among LED strings results in a complex design.
#LED DRIVER WITH BRIGHTNESS CONTROL DRIVERS#
LED drivers today often require multiple components to accurately drive a string of LEDs. The LM3466, with just a few passive components, provides a complete system that drives each LED string from any off-the-shelf AC/DC constant-current power supply. (NYSE:NSM) today introduced the LM3466, a highly integrated linear LED driver that simplifies the design of high power, wide area lighting fixtures such as streetlights. Fürstenfeldbruck – National Semiconductor Corp.