器件名称: AAT3159ITO-T1
功能描述: High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
文件大小: 347.54KB 共15页
简 介:PRODUCT DATASHEET
AAT3159
ChargePumpTM High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Features
Input Supply Voltage Range: 2.7V to 5.5V Tri-Mode (1X/1.5X/2X) Charge Pump Maximizes Efficiency 1MHz Constant Switching Frequency No Inductors, Low Noise Operation Drives Four Channels of LEDs up to 40mA/ Channel User-Programmable LED Current Excellent LED Channel-to-Channel Current Matching Digitally Programmable LED Current with Single-Wire S2Cwire Interface 16 Current Levels From 40mA to 50μA Low IQ (50μA) for Low Current Mode Operation True Load Disconnect in Shutdown; IQ < 1μA Built-In Thermal Protection Built-In Auto-Disable for Open LED Circuit Automatic Soft-Start Minimizes Inrush Startup Current 2.85x3x1mm TSOPJW-14 Package
General Description
The AAT3159 is a low noise, constant frequency charge pump DC/DC converter that uses a tri-mode load switch (1X), fractional (1.5X), and doubling (2X) conversion to maximize efficiency for white LED applications. The device is capable of driving up to four channels of LEDs at up to 40mA per channel from a 2.7V to 5.5V input supply voltage. The current sinks may be operated individually or in parallel for driving higher-current LEDs. A low external parts count (two 1μF flying capacitors [C1 and C2] and two small 1μF capacitors [CIN and COUT]) makes this part ideally suited for small battery-powered applications. AnalogicTech’s patented single-wire Simple Serial Control (S2Cwire) serial digital inter……
