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Optoelectronics/Displays??

Microsemi IC drives >100 RGB LEDs

Posted: 13 Feb 2003 ?? ?Print Version ?Bookmark and Share

Keywords:microsemi corporation? lx1991? led sink driver? led driver? led brightness control?

The LX1991 six-channel LED sink driver from Microsemi Corp. is capable of controlling the brightness of >100 standard green, red, or yellow LEDs from a MLPQ package that measures 4mm2.

Designed for use in automotive displays, the device exhibits high accuracy and features dual-mode dimming, as well as controlled current switching time to allow consistent color hue at brightness ratios of up to 1,000:1.

"Among its many applications, the LX1991 driver has a 43V breakdown capability and a wide compliance voltage range that makes it ideal for automotive in-dash displays," said Kelly Jones, VP and GM of Microsemi Integrated Products.

Dual mode dimming allows either analog (current amplitude) or digital (duty cycle) control. A single external capacitor allows symmetrical slope control of the output current when pulse dimming. The six-channel design features independent sink currents - channels can be left floating or multiple channels can be connected together to sink more current in a single load.





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