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Television Edge-lit

The Atmel® family of LED drivers offers the highest integration, reducing the overall system cost and size for flat-panel televisions. Their patented Efficiency Optimizer delivers significant power savings using simple and inexpensive power connector topologies. All drivers incorporate an internal pulse-width modulation ( PWM) engine with video sync capability that eliminates motion blur and offers the industry’s widest dimming range (up to 12 bits), precision string control and tight string-to-string-matching. Comprehensive system monitoring adjusts for LED aging, faults and thermal effects.

For edge-lit configurations, external power supplies and NFETs are used to drive larger number of LEDs (up to 72 LEDs) per string. Atmel LED drivers can drive up to 16 parallel strings of LEDs and offer fault detection and management of open-circuit and short-circuit LEDs. These devices address edge-lit and high-brightness LED applications that require higher power while enabling dimming via external PWM signals or analog current control with an internal 8-bit DAC.

Key Features

  • Up to 12-bit PWM string dimming
  • Fast SPI or I²C serial interfaces that support up to 16 devices per bus
  • Adaptive Power Control, which maximizes efficiency of up to three string power supplies
  • Ability to drive 16 parallel LED strings
  • Support for adaptive, real-time area dimming for highest dynamic range LCD TVs and monitors
  • Programmable string phase, which reduces motion blur
  • Single resistor that sets peak current for all LED strings
  • Video frame (VSYNC) and line (HSYNC) sync inputs
  • EEPROM, which allows customized power-on defaults

 
Device
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