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LED drivers comply with lighting brightness demands

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

Keywords:LED driver? step-down converter? lighting?

Diodes Inc. has extended its Zetex LED driver products with the release of its three compact LED drivers that improve accuracy and thermal capacity.

Along with TSOT23-5 and thermally enhanced DFN6, the upgraded ZXLD-1352, ZXLD-1356 and ZXLD-1366 provide adjustable output currents of 350mA, 550mA and 1A, respectively, and only need the support of three discrete external components to fit a wide range of automotive, architectural and industrial lighting applications.

The ZXLD drivers are continuous mode, inductive step-down converters, which are developed to drive single or multiple high brightness LEDs, and help in easing configuration and operation. Nominal output current managed by a resistor can be easily adjusted by using a PWM or DC voltage control signal, and allows precise matching for brightness requirements. A low-level control signal puts the output in off mode and puts the driver into standby.

The ZXLD1356 and ZXLD1366 have an output current accuracy more than 1 percent, giving users with highly precise current that is suitable for operating voltages until 60V. Capable of producing output powers of 30W and 48W respectively, the TSOT23-5/DFN63, 3mm x 3mm packaged drivers support up to 15 LEDs, and many other applications that need minimum footprint and maximum efficiency.

The ZXLD1352 operates from 7V to 30V supply and has output current of up to 350mA. The TSOT23-5, 2.8mm x 2.9mm packaged driver gives up to 8W of power for driving chains reaching 10 LEDs. With a large PWM dimming ratio of 1000:1, the driver provides highly flexible brightness control and accurate color mixing.

- Ismini Scouras

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