AnalogicTech aiming Tablet PC launch LCD backlight with automatic phase shift white LED driver

For consumption, analog semiconductor company industrial and communications market to provide power for innovative solutions analogictech Blx Ic Design Corp (Advanced Analogic Technologies, AnalogicTech), before the date for the rapid growth of the emerging tablet computer and a portable electronic device and liquid crystal computer mature market for display (LCD) the backlight application launched a high white LED driver, AAT1451.

AnalogicTech Marketing Manager Ray Chan company said: "in terms of power, due to changes in the size of the display and the application of the aiming system designers consider different factors. AAT1451 the LED driver provides a very comprehensive market, so it can further extend the battery life, which is critical to the fast-growing tablet market. At present LED drive of our company to support from the mobile phone to LCD across the board size display of large size TV, and all of these products have a lot of help features and options to enhance the end user experience. "

AnalogicTech AAT1451 LED drive new with a number of innovative features, terminal manufacturers to provide to meet the requirements of consumer products comprehensive function. For example, AAT1451 has the following characteristics:

Can drive up to 4 LEDs on (LED) series, efficiency up to 93%, and the use of automatic phase shift technology, can achieve the efficiency at low LED brightness level, which can further extend battery life.

Using 32 kHz pulse width modulation (PWM) working frequency, to ensure quiet work.

The high switching frequency (600kHz - 1MHz), the original equipment manufacturer (OEM) can be used in small passive devices, so as to realize the terminal products lighter minikin.

The DC input voltage range is wide, so the device can be powered by a lighter adapter and a lithium ion battery.

Safety functional integration, which can send out alarm signal to the controller, and take corresponding measures, disable short circuit and open circuit LED string, to prevent heat failure.

AAT1451 uses PWM proprietary dimming technology, the peak current can be reduced by 75%; the 256 level LED brightness, can support the Android operating system platform and content adaptive brightness control (CABC), so as to further extend battery life.

In order to ensure the accuracy of the color temperature and the brightness uniformity of the whole display screen, the AAT1451 adopts 4 accurate current traps, which can be programmed to the highest 30mA of each string, and the accuracy is between 1.5% and. It can drive up to 48 white LED, the total output current is 120mA.

Each 1- 000 batch at AAT1451 for $0.82. To understand the other batch ordering price, please contact the distributor or AnalogicTech. AAT1451 has been shipped.

Main characteristics:

Input voltage range: 2.7 26V to

Integrated 50V boost converter

PWM frequency: 32 kHz

The switching frequency can be adjusted to: 600kHz 1MHz

The maximum IOUT:120mA

Integrated fault protection function:

Overvoltage

Overheating

Soft start

Thin TDFN34-16 package

Temperature range: -40 to C + 85oC