AAT3114 SHEETHigh Efficiency 1.5X Fractional Charge Pumps for White LED Applications

The AAT3114 is a charge-pump based, current-source white LED driver capable of driving one to four LEDs up to 30mA, each. It automatically switches between 1x mode and 2x mode to maintain the highest efficiency and optimal LED current matching. The AAT3114 charge pump’s 1x mode (bypass mode) has very low resistance, allowing LED current regulation to be maintained with input supply voltage approaching the LED forward voltage. LED brightness is controlled using a universal PWM interface. The AAT3114 is available in a Pb-free, 2x2mm 10-lead SC70JW-10 package

技术特性

AAT3114: Four Outputs
AAT3114/14A: Six Outputs
20mA Full-Scale Current
Simple Serial Control (S2Cwire) Interface
32-Position Logarithmic Scale with Digital Control
Low Noise Constant Frequency Operation
33% Less Input Current Than Doubler Charge Pump
High Accuracy Brightness Matching
Small Application Circuit
Regulated Output Current
Automatic Soft Start
VIN Range: 2.7V to 5.5V
No Inductors
600kHz Switching Frequency
IQ <1μA in Shutdown
Temperature Range: -40°C to 85°C
12-Pin TSOPJW Package (AAT3114)
16-Pin QFN Package (AAT3114/14A)

应用领域 APPLICATION

Programmable Current Source
White LED Backlighting

订购信息 Ordering Information

AAT3114

AAT3114 典型应用

应用技术支持与电子电路设计开发资源下载	版本信息	大小
AAT3114 数据资料DataSheet下载:pdf	Rev.V2	2 页