austriamicrosystems has developed a 16-channel LED controller IC optimised for LCD TV backlighting applications. The AS3693B is designed to allow synchronisation of the LCD picture and the LED backlight unit in order to realise so-called ‘block dimming control’ for outstanding picture quality. The device’s high precision LED controller IC manages 16 LED cannels, each with a current accuracy of 0,5%. The high level of accuracy enables exact colour and brightness control of the LCD backlight. In addition, new features like ‘reverse PWM’ enable designers to control different LED segments of the backlighting unit. The AS3693B is available in an ePTQFP64 10 x 10 mm package.
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