Atmel launches power efficient multi-string LED drivers
They are claimed to be features that are ideal for rapidly growing LED applications in direct and edge-lit LCD TVs, PC monitors, industrial, military and avionics displays, as well as general illumination in the commercial, residential, industrial and infrastructure market segments.
Atmel’s patent-pending efficiency optimizer technology is said to minimise power consumption to the lowest practical level, allowing designers to use any DC-to-DC or AC-to-DC converter topology with isolated or non-isolated implementation, while dynamically maintaining the highest system power efficiency by minimizing excess voltage across LED strings.
The company claims the drivers enable LCD TVs to achieve an ultra-high 10M:1 dynamic contrast and the lowest motion-blur. The new drivers also provide over 10000:1 pulse-width modulation (PWM) dimming range for PC monitors and industrial displays.
In solid state lighting applications, the new LED driver ICs and Atmel microcontrollers allow dynamic white-point setting, color-mixing and networked lighting with Zigbee, DALI and other standards. Other features include comprehensive fault management, LED aging and thermal control, and programmability with the on-chip EEPROM and scalability to any number of LED strings with minimal DC-to-DC converters.
The multi-string Atmel LED driver ICs are available in three categories including external MOSFET current sinks for high-power LED lighting and edge backlighting applications; internal MOSFET current sinks for direct backlighting and low-power LED lighting; and with integrated power controller for PC monitors and industrial, medical, military displays.
For more information, visit www.atmel.com/atmel-led-driver
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