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Semtech unveils HB LED driver platform

Posted: 18 Dec 2012 ?? ?Print Version ?Bookmark and Share

Keywords:HB LED driver? ultrabook? HDTV?

Semtech Corp. has unveiled the SC5014 and SC5014A as an addition to its high-brightness LED (HB LED) driver platform. Respectively, the devices are 4-channel and 2-channel HB LED drivers that according to the company are geared to dramatically reduce display thickness in mid-size consumer and industrial displays.

The SC5014 and SC5014A make use of ultra-thin, 2.2�H inductors and claim to offer competitive efficiency. Advanced control architecture the drivers also allows designers to further enhance the efficiency by four percent through the use of a standard inductor, noted Semtech.

Both devices provide extensive control and protection features such as pulse-width modulation (PWM) and I2C-controlled dimming, open/shorted LED, adjustable over-voltage (OVP), over-temperature and under-voltage lock-out (UVLO). In addition, the devices feature wide VIN range from 4.5-27V, high VOUT range up to 50V, detailed the company.

The SC5014 has up to 56 LEDs at 120mA/ch, phase-shifted dimming while the SC5014A has up to 28 LEDs at 240mA/ch, non-phase-shifted dimming. The company said the devices tout high efficiency up to 92 percent with wide dimming range up to 5000:1 at 200kHz PWM input. The drivers, moreover, feature ?1 percent channel current matching for uniform display brightness and boast reduced BOM, thanks to the use of only one inductor, one external FET and no external compensation components.

According to the company, the SC5014 and SC5014A can be used in ultrabook PCs and all-in-one PCs, monitors and small HDTVs, and industrial and automotive displays.

The HB LED drivers are RoHS and WEEE compliant, and are packaged in 20-pin QFN (4 x 4 x1mm). The SC5014 (ordering code SC5014MLTRT) and the SC5014A (ordering code SC5014AMLTRT) are both priced at $1.69 each in 3,000 piece lots. The SC5014 and SC5014A are available immediately in production quantities.





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