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Low power 16-channel LED driver ICs enable brightest and clearest TV pictures

September 22, 2010 | Paul Buckley | 222901501
Low power 16-channel LED driver ICs enable brightest and clearest TV pictures austriamicrosystems has unveiled two new LED driver ICs that claim to ensure the brightest and most brilliant video images.
austriamicrosystems is extending its portfolio of LED BLU (backlight unit) drivers and controllers for the latest generation of LCD TVs with the AS3695A - a 16-channel white LED driver for direct lighting - and the AS3695C - a 16-channel white LED controller for edge lighting.

Both ICs feature power management and boast the best available accuracy. Outstanding driver accuracy of +/-0.5% guarantees exact brightness and color matching and channel-to-channel current matching is +/-0.2%, resulting in high lighting contrast ratios for the best possible picture quality and 3D effects.  In addition, the high precision AS3695A and AS3695C include novel power feedback regulation for controlling external power supplies for the highest system efficiency and reduced power in LED backlit LCD TVs.  

The devices are programmable via a SPI (serial peripheral interface) port and provide built-in safety features, including thermal shutdown and open and short LED detection. Other features include linear current setting using a 10-bit DAC, output slew rate programmability, H-Sync and V-Sync inputs to synchronize with a TV, direct PWM mode, undervoltage auto-turnoff, overvoltage auto-turnoff, temperature shutdown and fault interrupt output.

Availability and Pricing

Samples are available now. The 1,000 piece price for the AS3695A QFN is 2.10 US Dollars. The AS3695C QFN and AS3695C LQFP are 2.20 US Dollars and 2.70 US Dollars, respectively.

A demo board is available to help evaluate the AS3695A / AS3695C.

More information about the new AS3695A / AS3695C 16-channel white LED drivers at www.austriamicrosystems.com/LED-Driver/AS3695    

Visit austriamicrosystems at www.austriamicrosystems.com









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