器件名称: AAT3114ISN-20-T1
功能描述: High Efficiency 1.5X Fractional Charge Pumps For White LED Applications
文件大小: 232.59KB 共14页
简 介:High Efficiency 1.5X Fractional Charge Pumps For White LED Applications General Description
The AAT3113/4 are low noise, constant frequency charge pump DC/DC converters that use fractional (1.5X) conversion to increase efficiency in White LED applications. The devices can be used to produce current levels up to 20mA for each output from a 2.7V to 5.5V input. Low external parts counts (two 1F flying capacitors and two small bypass capacitors at VIN, and OUT) make the AAT3113/4 ideally suited for small battery-power applications. AnalogicTech’s Simple Serial Control (S2Cwire) interface is used to enable, disable and set the LED drive current for a 32 level logarithmic scale LED brightness control. The AAT3113/4 have a thermal management system to protect the device in the event of a short circuit condition on any of the output pins. Built-in softstart circuitry prevents excessive inrush current during start-up. High switching frequency enables the use of small external capacitors. A low current shutdown feature disconnects the load from VIN and reduces quiescent current to less than 1A. The AAT3113 provides 4 LED current source outputs, and the AAT3114 provides 6. The AAT3113/4 are available in 16-pin quad QFN packages, and the AAT3113 is also available in the 12-pin TSOPJW package.
AAT3113/4
Features
ChargePump
White LED Backlighting AAT3113 - 4 Outputs AAT3114 - 6 Outputs 20mA Full Scale Current 32 Position Logarithmic Scale with Digital Control Simple S……
