AnalogicTech launches direct and edge LED backlighting driver line

Advanced Analogic Technologies Inc. (AnalogicTech) has entered the LED backlit LCD television market with seven chipsets designed to enhance energy efficiency and user-experience for LED backlit LCD televisions, according to a recent article in EETimes.

The AAT2400/01 and AAT2402M/S chipsets produce a 16-channel high current LED driver capable of driving up to 10 LEDs in a single string. Each master and slave contains 8 high-voltage current sinks capable of sinking up to 100mA/channel. Using a SPI interface, up to 16 chipsets (or 256 channels) can be sequentially addressed and controlled. Each channel features 8-bit DOT correction, 12-bit grayscale, 12-bit delay time and on/off control. Protection against over-voltage, short or open circuit LEDs, over-temperature and over-current is included, with the information reported via the SPI bus and a fault flag. To provide the power for the LED strings, the AAT2400 and AAT2402M includes a boost converter with an integrated lateral Trench DMOS output device, which uses the current sink information from each channel to ensure that the output voltage can correctly bias all LED strings regardless of LED forward voltage.