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Controller drives high-brightness LEDs in series

Posted: 09 Apr 2008 ?? ?Print Version ?Bookmark and Share

Keywords:non-synchronous boost controller? high-power LEDs?


Texas Instruments Inc. has introduced a 4.5-52V wide-input voltage, non-synchronous boost controller, intended for applications where the output is a regulated current instead of a regulated voltage. The TPS40211, demonstrated at the Light+Building Frankfurt show (running from April 6 to 11) at the "LED Light for you (LLFY)powered by Osrambooth, allows designers to efficiently manage LED lighting, industrial control and battery-powered systems.

The TPS40211 efficiently drives high-power LEDs when the input voltage is less than the voltage to turn on the LEDs. The LED driver is designed to power multiple 1-5W high-brightness LEDs in a series, and features a programmable closed soft start, overcurrent protection with automatic retry and a programmable oscillator frequency. The device's fixed frequency current mode control provides improved transient response and simplified loop compensation. Designers have the flexibility to use the TPS40211 for boost, flyback, SEPIC and various LED driver topologies.

The TPS40211 is available today in volume. The device is offered in a 10-pin PowerPADTM and a 10-pin SON package. Suggested resale price is $1.40 in 100-unit quantities.

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