Raleigh, NC—Austriamicrosystems bills its AS3691 chip as the world's first high-current with high-precision LED driver. "The IC's absolute current accuracy of 0.5 percent allows for highly accurate brightness settings and is thus ideal for supporting sophisticated color management applications like LCD monitors with RGB backlighting," said Ronald Tingl, marketing manager for Power Management.
The AS3691 includes four independent high precision current sources each capable of handling 400 mA (for four strings of RGB or single-color LEDs, or a single LED string for up to 1.6 amps). Users set operating current for each channel with an external resistor. Four independent pulse-width-modulated inputs control LED brightness.
"With four independent current sinks, the AS3691 offers great flexibility in combining various color LED settings such as RGGB or RGBA (color combination) strings," said Tingl. "The current sources have a wide voltage compliance range of 15 volts and special internal circuitry allows for very high LED supply voltages that are limited only by the maximum power dissipation allowed for the entire application."
The AS3691's product brief can be secured by clicking here. The IC, available in a 4-by-4 mm QFN, is priced at $1.60 each in 1k pieces.
austriamicrosystems, 1-919-676-5292, www.austriamicrosystems.com