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Optoelectronics/Displays??

Sipex LED driver drives multiple LEDs from 16V input voltage rail

Posted: 02 Sep 2005 ?? ?Print Version ?Bookmark and Share

Keywords:sipex? sp7615? led driver?

Sipex's new LED driverSipex Corp. unveiled a linear constant current LED driver that is designed to drive multiple LEDs in series from a high input voltage rail (16V max).

Complimenting the company's existing LED drivers, the SP7615 is designed for mid size LCD module backlighting, LCD TV LED backlighting, landscape lighting and any high power LED lighting application.

The new LED driver employs a simple design that enables a cost-effective solution for driving LEDs from a wide range of input voltages. It is capable of powering up to four LED strings of up to 125mA per string for a total of 500mA. LED current can be adjusted with only one external resistor, thus offering a simple and easy to use solution to accurately match the current between multiple LEDs. The device also promises very low drop out voltage for high efficiency.

Sipex added that the product's internal circuitry maintains the preset constant current output for a wide voltage range at the 4 LED outputs. Brightness can be adjusted by employing a PWM dimming scheme, and outputs can be connected in parallel to increase driving capability. In addition, the SP7615 features built-in thermal protection which automatically adjusts LED current to prevent overheating.

Offered in a 2-by-3mm 8-pin DFN package, the SP7615 is qualified over the -40C to 85C temperature range. Samples are already available to help assist in the evaluation of the products. Pricing for these devices start at 92 cents in 1,000-piece quantities.




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